Publications

2022

Northam, M., Fouliard, Q., Rossmann, L., Park, J., Kenesei, P., Almer, J., Viswanathan, V., Harder, B. and Raghavan, S. (September 23, 2022). "Thermally Grown Oxide Stress in PS-PVD and EB-PVD Thermal Barrier Coatings Observed at Various Lifetimes Via Synchrotron X-Ray Diffraction." ASME. J. Eng. Mater. Technol. January 2023; 145(1): 011004.

Peter Warren, Nandhini Raju, Hossein Ebrahimi, Milos Krsmanovic, Seetha Raghavan, Jayanta Kapat, Ranajay Ghosh. "Effect of Sintering Temperature on Microstructure and Mechanical Properties of Molded Martian and Lunar Regolith." Ceramics International. 2022; ISSN 0272-8842.

Quentin Fouliard, Hossein Ebrahimi, Johnathan Hernandez, Khanh Vo, Frank Accornero, Mary McCay, Jun-Sang Park, Jonathan Almer, Ranajay Ghosh, Seetha Raghavan. "Stresses Within Rare-Earth Doped Yttria-Stabilized Zirconia Thermal Barrier Coatings From In-Situ Synchrotron X-Ray Diffraction at High Temperatures." Surface Coatings & Technology. Volume 444. 2022; 128647; ISSN 0257-8972.

Johnathan Hernandez, Quentin Fouliard, Khanh Vo, Seetha Raghavan. "Detection of Corrosion Under Insulation on Aerospace Structures via Pulsed Eddy Current Thermography." Aerospace Science and Technology. Volume 121. 2022; 107317; ISSN 1270-9638.

Ali, H., Stein, Z., Fouliard, Q., Ebrahimi, H., Warren, P., Raghavan, S. and Ghosh, R. (2022). "Computational Model of Mechano-Electrochemical Effect of Aluminum Alloys Corrosion." Journal of Engineering for Gas Turbines and Power. 144(4); 041004.

2021

Agathe Demay, Johnathan Hernandez, Perla Latorre, Remelisa Esteves, Seetha Raghavan. “Functional Coatings for Damage Detection in Aerospace Structures." Technology & Innovation. Volume 22, Number 1; June 2021; pp. 95-103(9).

Chance Barrett, Zachary Stein, Johnathan Hernandez, Ravisankar Naraparaju, Uwe Schulz, Laurene Tetard and Seetha Raghavan. "Detrimental Effects of Sand Ingression in Jet Engine Ceramic Coatings Captured With Raman-Based 3D Rendering." Journal of the European Ceramic Society. 41(2); 1664-1671; 2021.

2020

Zachary Stein, Peter Kenesei, Jun-Sang Park, Jonathan Almer, Ravisankar Naraparaju, Uwe Schulz and Seetha Raghavan, "High-Energy X-Ray Phase Analysis of CMAS-Infiltrated 7YSZ Thermal Barrier Coatings: Effect of Time and Temperature." Journal of Materials Research. 35(17); 2300-2310; 2020.

Quentin Fouliard, Ranajay Ghosh, Seetha Raghavan. “Quantifying Thermal Barrier Coating Delamination Through Luminescence Modeling." Surface and Coatings Technology. 126153; 2020.

Lin Rossmann, Brooke Sarley, Johnathan Hernandez, Peter Kenesei, Alain Köster, Janine Wischek, Jonathan Almer, Vincent Maurel, Marion Bartsch and Seetha Raghavan. "Method for Conducting In Situ High-Temperature Digital Image Correlation With Simultaneous Synchrotron Measurements Under Thermomechanical Conditions." Review of Scientific Instruments. 91(3); 033705; 2020.

Quentin Fouliard, Johnathan Hernandez, Bauke Heeg, Ranajay Ghosh, Seetha Raghavan. “Phosphor Thermometry Instrumentation for Synchronized Acquisition of Luminescence Lifetime Decay on Thermal Barrier Coatings.” Measurement Science and Technology. 2020.

2019

Lin Rossmann, Matthew Northam, Brooke Sarley, Liudmila Chernova, Vaishak Viswanathan, Bryan Harder and Seetha Raghavan. "Investigation of TGO Stress in Thermally Cycled Plasma-Spray Physical Vapor Deposition and Electron-Beam Physical Vapor Deposition Thermal Barrier Coatings via Photoluminescence Spectroscopy." Surface and Coatings Technology. 125047; 2019.

Remelisa Esteves, Johnathan Hernandez, Khanh Vo, Ryan Hoover, Gregory Freihofer and Seetha Raghavan. "Measurements for Stress Sensing of Composites Using Tailored Piezospectroscopic Coatings." AIP Advances. 9(5); 055201; 2019.

Quentin Fouliard, Sandip Haldar, Ranajay Ghosh, Seetha Raghavan. "Modeling Luminescence Behavior for Phosphor Thermometry Applied to Doped Thermal Barrier Coating Configurations." Applied Optics. 58(13); D68-D75; 2019.

2018

Albert Manero II, Kevin Knipe, Janine Wischek, Carla Meid, John Okasinski, Jonathan Almer, Anette M. Karlsson, Marion Bartsch and Seetha Raghavan. "Capturing the Competing Influence of Thermal and Mechanical Loads on the Strain of Turbine Blade Coatings via High Energy X-Rays," Coatings. 320; Vol. 8; Issue 9; 2018.

Alex Selimov, Sanjida Akter Jahan, Eric Barker, Peter Dackus, Declan Carolan, Ambrose Taylor and Seetha Raghavan. "Silane Functionalization Effects on Dispersion of Alumina Nanoparticles in Hybrid Carbon Fiber Composites." Appl. Opt. 57; 6671-6678; 2018.

2016

Albert Manero II, Alex Selimov, Quentin Foullard, Kevin Knipe, Janine Wischek, Carla Meid, Anette M, Karlsson, Marion Bartsch, Seetha Raghavan. “Piezospectroscopic Evaluation and Damage Identification for Thermal Barrier Coatings Subjected to Simulated Engine Environments." Surface and Coatings Technology. 323; 30-38; 2016.

Imad Hanhan, Alex Selimov, Declan Carolan, Ambrose Taylor, Seetha Raghavan. “Quantifying Alumina Nanoparticle Dispersion in Hybrid Carbon Fiber Composites Using Photoluminescent Spectroscopy." Applied Spectroscopy. 71; 258-266; January 1, 2016.

2015

Kevin Knipe, Albert Manero II, Sanna F. Siddiqui, Carla Meid, Janine Wischek, John Okasinski, Johnathan Almer, Anette M. Karlsson, Marion Bartsch, Seetha Raghavan. "Inside the Engine Environment — Synchrotrons Reveal Secrets of High-Temperature Ceramic Coatings." (Cover Story) American Ceramic Society Bulletin. 94(1); 22-27; 2015.

Gregory Freihofer, Axel Schülzgen, Seetha Raghavan. "Damage Mapping With a Degrading Elastic Modulus Using Piezospectroscopic Coatings." NDT & E International. Vol. 75; 65-71; October 2015.

Albert Manero II, Jason Gibson, Gregory Freihofer, Jihua Gou, Seetha Raghavan. "Evaluating the Effect of Nano-Particle Additives in Kevlar® 29 Impact-Resistant Composites." Composites Science and Technology. 116; 41-49; 2015.

Albert C. Manero II, Stephen Sofronsky, Kevin Knipe, John Okasinski, Jonathan Almer, Janine Wischek, Carla Meid, Anette Karlsson, Seetha Raghavan, Marion Bartsch. "Monitoring Local Strain in a Thermal Barrier Coating System Under Thermal Mechanical Gas Turbine Operating Conditions." The Journal of the Minerals, Metals & Materials Society (TMS). 1-12; 2015.

Gregory Freihofer, Joshua Dustin, Hong Tat, Axel Schülzgen and Seetha Raghavan. "Stress and Structural Damage Sensing Piezospectroscopic Coatings Validated With Digital Image Correlation." AIP Advances. 5; 037139; 2015.

Kevin Knipe, Albert C. Manero, II, Stephen Sofronsky, John Okasinski, Jonathan Almer, Janine Wischek, Carla Meid, Anette Karlsson, Marion Bartsch, Seetha Raghavan. "Synchrotron X-Ray Diffraction Measurements Mapping Internal Strains of Thermal Barrier Coatings During Thermal Gradient Mechanical Fatigue Loading." Journal of Engineering for Gas Turbines and Power. 137(8); 082506; 2015.

2014

Kevin Knipe, Alberto Manero II, Stephen Sofronsky, John Okasinski, Jonathan Almer, Janine Wischek, Carla Meid, Anette Karlsson, Marion Bartsch, Seetha Raghavan. "Synchrotron XRD Measurements Mapping Internal Strains of Thermal Barrier Coatings During Thermal Gradient Mechanical Fatigue Loading." ASME Turbo Expo: Power for Land, Sea and Air, Volume 6: Ceramics; Controls, Diagnostics and Instrumentation; Education; Manufacturing Materials and Metallurgy, 2014.

Imad Hanhan, Erik Durnberg, Gregory Freihofer, Paul Akin, Seetha Raghavan. "Portable Piezospectroscopy System: Non-Contact In-Situ Stress Sensing Through High Resolution Photo-Luminescent Mapping." Journal of Instrumentation. 9; P11005; 2014.

Gregory Freihofer, Axel Schülzgen, Seetha Raghavan. "Multiscale Mechanics to Determine Nanocomposite Elastic Properties With Piezospectroscopy." Acta Materialia. 81; 211-218; 2014.

Kevin Knipe, Albert Manero, Sanna F. Siddiqui, Carla Meid, Janine Wischek, John Okasinski, Jonathan Almer, Anette M. Karlsson, Marion Bartsch and Seetha Raghavan. "Strain Response of Thermal Barrier Coatings Captured Under Extreme Engine Environments Through Synchrotron X-Ray Diffraction." Nature Communications, 5; July 31, 2014.

Gregory Freihofer, Daniela Fugon-Dessources, Emrecan Ergin, Amy Van Newkirk, Ankur Gupta, Sudipta Seal, Axel Schülzgen, Seetha Raghavan. “Piezospectroscopic Measurements Capturing the Evolution of Plasma Spray-Coating Stresses With Substrate Loads." ACS Applied Materials & Interfaces. 6 (3); pp. 1366–1369; 2014.

Jason Gibson, James McKee, Gregory Freihofer, Seetha Raghavan and Jihua Gou. “Enhancement in Ballistic Performance of Composite Hard Armor Through Carbon Nanotubes.” International Journal of Smart and Nano Materials. Vol. 4, Issue 4; pp. 212-228; 2014.

2013

Sanna F. Siddiqui, Kevin Knipe, Albert Manero, Carla Meid, Janine Wischek, John Okasinski, Jonathan Almer, Anette Karlsson, Marion Bartsch and Seetha Raghavan. “Synchrotron X-Ray Measurement Techniques for Thermal Barrier Coated Cylindrical Samples Under Thermal Gradients.” Review of Scientific Instruments. 84; 083904; 2013.

Gregory Freihofer, Seetha Raghavan, David Gosztola. “Investigation of Temperature-Dependent Multi-Walled Nanotube G and D Doublet Using Pseudo-Voigt Functions.” Applied Spectroscopy. Vol. 67 (3); pp. 321-328; 2013.

2012

Rene Diaz, Melan Jansz, Mitra Mossaddad, Seetha Raghavan, John Okasinski, Jonathan Almer, Hugo Palaez-Perez, Peter Imbrie. “Role of Mechanical Loads in Inducing In-Cycle Tensile Stress in Thermally Grown Oxide." Applied Physics Letters. Vol. 100; 111906; 2012.

Gregory Freihofer, Fei Liang, Bharathi Mohan, Jihua Gou, Seetha Raghavan. “Ex-Situ Raman Spectroscopy to Optimize the Manufacturing Process for a Structural MWNT Nanocomposite.” International Journal of Smart and Nano Materials. Available online Jan. 24, 2012.

2011

Yibo Gao, Fei Liang, Gregory Freihofer, Benxin Wu, Bharathi Mohan, Seetha Raghavan, Jihua Gou, Shuyou Li, Brian Albee and Sandra Whaley Bishnoi. “Laser Sintering of Carbon Nanotube Reinforced Ceramic Composites.” International Journal of Smart and Nano Materials. Vol 2; Issue 4; 219-229 2011.

Amanda Stevenson, Ashley Jones and Seetha Raghavan. “Characterization of Particle Dispersion and Volume Fraction in Alumina-Filled Epoxy Nanocomposites Using Photostimulated Luminescence Spectroscopy.” Polymer Journal. 43; 923-929; 2011.

Amanda Stevenson, Ashley Jones and Seetha Raghavan. “Stress Sensing Nanomaterial Calibrated With Photo-Stimulated Luminescence Emission.” Nano Lett. 11 (8); pp. 3274-3278; 2011.

Seetha Raghavan and Peter Imbrie. "High-Resolution Stress Mapping of Polycrystalline Alumina Compression Using Synchrotron X-Ray Diffraction.” Journal of Synchrotron Radiation. Vol. 18; Issue 3; 497-505; 2011.

2010

Gregory Freihofer, Laura Poliah, Kalippe Walker, Andre Medina and Seetha Raghavan, “Optical Stress Probe: In Situ Stress Mapping With Raman and Photo-Stimulated Luminescence Spectroscopy.” Journal of Instrumentation. Vol. 5; P12003; 2010.

2009

Seetha Raghavan, Peter K. Imbrie. “Ex-Situ Stress Measurements in Polycrystalline Ceramics Using Photo-Stimulated Luminescence Spectroscopy and High Energy X-Rays.” Journal of the American Ceramic Society. Vol. 92; 1567-1573; June 2009.

2008

Seetha Raghavan, Peter K. Imbrie, William A. Crossley. “Spectral Analysis of R Lines and Vbronic Sidebands in the Emission Spectrum of Ruby Using Genetic Algorithms." Applied Spectroscopy. Vol. 62; 759-765; July 2008.

2022

Quentin P. Fouliard, Ranajay Ghosh and Seetha Raghavan. "Thermal Barrier Coating Delamination Monitoring Through Thermally Grown Oxide Spectral Characterization." AIAA SCITECH 2022 Forum. 2022.

2021

Prapoojith Arcot & Seetha Raghavan. “Development of a Stress Corrosion Cracking Test Approach for Multi-Mode Measurements.” AIAA 2021 Regional Student Conference. April 2021.

Vanessa D’Esposito & Seetha Raghavan. “Comparison of 3D Confocal Raman and High-Energy X-Ray Diffraction for the Measurement of Molten Sand Infiltration in Turbine Blade Coatings.” AIAA 2021 Regional Student Conference. April 2021 (Second Place Winner, Undergraduate Category).

Perla Latorre-Suraez, Rohan Madathil, Nya Segura-Watson, Felix Morales, Vanessa D’Esposito, Seetha Raghavan. “3D Printed Stress Sensors for Non-Destructive Evaluation of Space Structures.” AIAA 2021 Regional Student Conference. April 2021.

Quentin Fouliard, Johnathan Hernandez, Hossein Ebrahimi, Khanh Vo, Frank Accornero, Mary McCay, Jun-Sang Park, Jonathan Almer, Ranajay Ghosh, Seetha Raghavan. "Synchrotron X-Ray Diffraction To Quantify In-Situ Strain on Rare-Earth Doped Yttria-Stabilized Zirconia Thermal Barrier Coatings.” ASME Turbo Expo 2021: Turbomachinery Technical Conference & Exposition. American Society of Mechanical Engineers. 2021. (Accepted)

Quentin P. Fouliard, Ranajay Ghosh and Seetha Raghavan. "Delamination of Electron-Beam Physical-Vapor Deposition Thermal Barrier Coatings Using Luminescent Layers." AIAA Scitech Forum. January 12, 2021.

Johnathan Hernandez, Quentin P. Fouliard, Khanh Vo, Seetha Raghavan. "Characterization of Corrosive Defects Through Pulsed Eddy Current Thermography for Aircraft Panels." AIAA Scitech Forum. January 12, 2021.

2020

Johnathan Hernandez, Quentin Fouliard, Caroline Anderson, Matthew Northam, Khanh Vo, Jared Clabaugh, Douglas Wolfe et al. "In-Situ XRD Characterization of Interface Strains in Multilayered Ceramic Composite Systems for Hypersonics Applications." In 23rd AIAA International Space Planes and Hypersonic Systems and Technologies Conference. 2020.

Matthew Northam, Lin Rossmann, Brooke Sarley, Maxwell Smith, Peter Kenesei, Jun-Sang Park, Jonathan Almer, Bryan Harder, Vaishak Viswanathan, Seetha Raghavan. "Comparison of Thermally Cycled PS-PVD and EB-PVD Thermal Barrier Coatings' Depth-Resolved Monoclinic Phase Evolution via Synchrotron X-Ray Diffraction." AIAA Scitech Forum. January 6-10, 2020. Orlando, Florida.

Zachary Stein, Ravisankar Naraparaju, Uwe Schulz, Peter Kenesei, Jun-Sang Park, Jonathan Almer, Seetha Raghavan. "Synchrotron X-Ray Diffraction Study of Phase Transformation in CMAS Ingressed EB-PVD Thermal Barrier Coatings." AIAA Scitech Forum. January 6-10, 2020. Orlando, Florida.

Johnathan Hernandez, Quentin Fouliard, Khanh Vo, Seetha Raghavan. "Simulation and Experimentation of Pulsed Eddy Current Thermography for Corrosion Detection Under Insulation." AIAA Scitech Forum. January 6-10, 2020. Orlando, Florida.

Quentin Fouliard, Ranajay Ghosh and Seetha Raghavan. “Doped 8% Yttria Stabilized Zirconia for Temperature Measurements on Thermal Barrier Coatings Using Phosphor Thermometry." AIAA Scitech Forum. January 6-10, 2020. Orlando, Florida.

2019

Quentin Fouliard, Bauke Heeg, Ranajay Ghosh, Seetha Raghavan. “Luminescence Characterization of Temperature Sensitive Phosphor Doped Thermal Barrier Coatings.” Surface Protection for Enhanced Materials Performance: Science, Technology and Application, MS&T19. October 2, 2019. Portland, Oregon.

Sandip Haldar, Peter Warren, Quentin Fouliard, David Moreno, Mary McCay, Jun-Sang Park, Peter Kenesei, Jonathan Almer, Ranajay Ghosh, Seetha Raghavan. “Synchrotron X-Ray Diffraction Measurements of Thermal Barrier Coating Configurations with Rare Earth Elements for Phosphor Thermometry.” ASME Turbomachinery Technical Conference and Exposition. June 17-21, 2019. Phoenix, AZ.

Matthew Northam, Lin Rossmann, Brooke Sarley, Bryan Harder, Jun-Sang Park, Peter Kenesei, Jonathan Almer, Vaishak Viswanathan, Seetha Raghavan. “Comparison of Electron-Beam Physical Vapor Deposition and Plasma-Spray Physical Vapor Deposition Thermal Barrier Coating Properties Using Synchrotron X-Ray Diffraction." ASME Turbomachinery Technical Conference and Exposition. June 17-21, 2019. Phoenix, AZ.

Lin Rossmann, Matthew Northam, Brooke Sarley, Liudmila Chernova, Vaishak Viswanathan, Bryan Harder, Seetha Raghavan. “Investigation of TGO Stress in Thermally Cycled Plasma-Spray Physical Vapor Deposition and Electron-Beam Physical Vapor Deposition Thermal Barrier Coatings via Photoluminescence Spectroscopy." International Conference on Metallurgical Coatings and Thin Films. May 19-24, 2019. San Diego, California.

Remelisa Esteves, Ryan Hoover, Khanh Vo, Sanjida A. Jahan, Sandip Haldar, Seetha Raghavan. "Application of Stress Sensing Coatings on Metal Substrates With a Sub-Surface Notch." 2019 AIAA SciTech Forum. January 7-11, 2019. San Diego, California.

2018

Quentin Fouliard, Sanjida A. Jahan, Lin Rossmann, Peter Warren, Ranajay Ghosh, Seetha Raghavan. "Configurations for Temperature Sensing of Thermal Barrier Coatings." International Conference on Phosphor Thermometry. July 25-27, 2018. Glasgow, UK.

Remelisa Esteves, Ryan Hoover, Khanh Vo, Seetha Raghavan. "Piezospectroscopic Coatings: Effects of Alumina Nanoparticle Volume Fraction on Stress-Sensing." Society for the Advancement of Material and Process Engineering (SAMPE). May 21-25, 2018. Long Beach, California.

Debraliz Isaac Aragones, Lin Rossmann, Estefania Bohorquez, Brooke Sarley, Owen Pryor, Seetha Raghavan. “U.S.-Germany Collaboration in Materials for Extreme Environments: Developing an International Research Pathway Towards Creating Global Engineers for the Future.” ASEE-SE Educating the Engineer of the Future. March 6-8, 2018. Embry-Riddle Aeronautical University, Daytona Beach, Florida.

Lin Rossmann, Brooke Sarley, Johnathan Hernandez, Peter Kenesei, Jonathan Almer, Janine Wischek, Marion Bartsch, Alain Köster, Vincent Maurel, Seetha Raghavan. "Method for Conducting In-Situ High-Temperature DIC With Simultaneous Synchrotron Measurements Under Thermomechanical Load." AIAA Science and Technology Forum and Exposition. January 8-12, 2018. Orlando, Florida.

Sanjida A. Jahan, Mohamed Abdelgader, Eric Barker, Johnathan Hernandez, Ryan Hoover, Hao Pan, Yuanli Bai, Declan Carolan, Ambrose Taylor, Seetha Raghavan. "Effect of Functionalization on Mechanical Properties of Hybrid Carbon Fiber Reinforced Polymer (HCFRP) Composites Using Piezopectroscopy." 2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. January 8-12, 2018. Kissimmee, Florida.

Estefania Bohorquez, Brooke Sarley, Johnathan Hernandez, Ryan Hoover, Laurene Tetard, Ravisankar Naraparaju, Uwe Schulz, Seetha Raghavan. "Investigation of the Effects of CMAS-infiltration in EB-PVD 7% Yttria-Stabilized Zirconia via Raman Spectroscopy." 2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. January 8-12, 2018. Kissimmee, Florida.

2017

Alex Selimov, Ryan Hoover, Quentin Fouliard, Albert Manero II, Peter Dackus, Declan Carolan, Ambrose Taylor, Seetha Raghavan. "Characterization of Hybrid Carbon Fiber Composites Using Photoluminescence Spectroscopy." 58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. January 9-13, 2017. Grapevine, Texas.

Brooke Sarley, Albert C. Manero, Jose Cotelo, Janine Wischek, John Okasinski, Peter Kenesei, Johnathan Almer, Marion Bartsch, Seetha Raghavan. "Real-Time Phase Evolution of Selective Laser Melted (SLM) Inconel 718 With Temperature Through Synchrotron X-Rays." 58th AIAA/ASCE/AHS/ASC Structural Dynamics and Materials Conference, AIAA SciTech Forum. January 9-13, 2017. Grapevine, Texas.

2016

Albert Manero II, Stephen Sofronsky, Katia Artzt, Stefan Hackemann, Janine Wischek, John Okasinski, Peter Kenesei, Jonathan Almer, Marion Bartsch, Seetha Raghavan*. “Interpreting High Temperature Deformation Behavior of a Ceramic Matrix Composite via High Energy X-rays and Numerical Simulation.” SciTech 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. January 4-8, 2016. San Diego, California.

Imad Hanhan, Alex P. Selimov, Declan Carolan, Ambrose Taylor, Seetha Raghavan. “Characterizing Mechanical Properties of Hybrid Alumina Carbon Fiber Composites With Piezospectroscopy.” 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. January 4-8, 2016. San Diego, California.

2015

Albert C. Manero, Kevin Knipe, Carla Meid, Janine Wischek, Claudine Lacdao, Matthew Smith, John Okasinski, Jonathan Almer, Marion Bartsch, Anette Karlsson, Seetha Raghavan. "Comparison of Thermal Barrier Coating Stresses via High Energy X-Rays and Piezospectroscopy." SciTech 53rd AIAA Aerospace Sciences Meeting. January, 5-9, 2015. Kissimmee, Florida.

Gregory Freihofer & Seetha Raghavan. "Damage Mapping of Composites With Piezospectroscopic Coatings." SciTech 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. January 5-9, 2015. Kissimmee, Florida.

2014

Gregory Freihofer & Seetha Raghavan. “Material State Measurements with Nanocomposite Piezospectroscopic Coatings.” SAMPE: The Composites and Advanced Materials Expo. October 14-16, 2014. Orlando, Florida. Student paper competition 2nd Place Award.

G. Freihofer, A. Bullock, F. Vaughn, H. Tat, J. Dustin, A. Schülzgen, S. Raghavan. “Stress and Damage Sensing of Composite Coupons With Piezospectroscopic Coatings.” Proceedings of the Society for the Advancement of Material and Process Engineering 2014 Conference. June 2-5, 2014. Seattle, Washington.

E. Durnberg, I. Hanhan, G. Freihofer, D. Lui, J. Gou, S. Raghavan. “Experimental Piezospectroscopic Measurements to Study Load Transfer in a Single Alumina Particle Embedded Within an Epoxy Matrix.” Proceedings of the Society for the Advancement of Material and Process Engineering 2014 Conference. June 2-5 2014. Seattle, Washington.

A. Jones, J.J. Rosas, S. Raghavan. “Variable Strain Rate In-Situ Piezospectroscopic Studies of Alumina Nanocomposites.” Proceedings of the Society for the Advancement of Material and Process Engineering 2014 Conference. June 2-5 2014. Seattle, Washington.

K. Knipe, A. Manero II, S. Sofronsky, J. Okasinski, J. Almer, J. Wischek, C. Meid, A. Karlsson, M. Bartsch, S. Raghavan. “Synchrotron XRD Measurements Mapping Internal Strains of Thermal Barrier Coatings During Thermal Gradient Mechanical Fatigue Loading.” ASME Turbo Expo: Power for Land, Sea and Air, Volume 6: Ceramics; Controls, Diagnostics and Instrumentation; Education; Manufacturing Materials and Metallurgy, 2014.

Gregory Freihofer, Ankur Gupta, Amy Van Newkirk, Sudipta Seal, Seetha Raghavan. "Optical Stress Sensing Alumina Nanocomposite Coatings for Aerospace Structures.” AIAA SciTech 55th AIAA/ASME/ASCE/AHS/SC Structures, Structural Dynamics and Materials Conference. January 13-17, 2014. National Harbor, Maryland.

Erik Durnberg, Ashley Jones, Joseangel Rosas, George Sunny, Seetha Raghavan. “Monitoring Strain Rate Effects on Nanocomposites Using Piezospectroscopy.” AIAA SciTech 55th AIAA/ASME/ASCE/AHS/SC Structures, Structural Dynamics and Materials Conference. January 13-17, 2014. National Harbor, Maryland.

Kevin Knipe, Albert Manero, Sanna F. Siddiqui, Stephen Sofronsky, Pascal Fouquet, Carla Meid, Janine Wischek, Marion Bartsch, John Okasinski, Jonathan Almer, Anette Karlsson, Seetha Raghavan. “Synchrotron XRD Measurements of Thermal Barrier Coatings Subjected to Loads Representing Operational Conditions of Rotating Gas Turbine Blades.” AIAA SciTech 52nd Aerospace Sciences Meeting. January 13-17, 2014. National Harbor, Maryland.

2013

Gregory Freihofer, Daniela Fugon, Ashley Jones, Emrecan Ergin, Axel Schülzgen and Seetha Raghavan. “Prediction of Piezospectroscopic Properties With Nanoparticle Load Transfer Theories.” Proceedings of the Society for the Advancement of Material and Process Engineering 2013 Conference. May 6-9, 2013. Long Beach, California.

Ashley Jones, Greg Freihofer, Daniela Fugon, Marc Lowen, Seetha Raghavan. “Low Strain Rate In-Situ Piezospectroscopic Studies of Alumina Nanocomposites.” Proceedings of the Society for the Advancement of Material and Process Engineering 2013 Conference. May 6-9, 2013. Long Beach, California.

Kevin Knipe, David Siljee, John Okasinski, Jonathan Almer, S. Raghavan, Sendil Rangaswamy. “Simulations Mapping Stress Evolution in High Temperature Ceramic Coatings Under Thermal-Mechanical Conditions.” AIAA Structures, Structural Dynamics and Materials Conference. Boston, Massachusetts, 2013.

2012

Ashley S. Jones, Gregory Freihofer, Emrecan Ergin, Kevin Lautenslager, Will Gysi, Axel Schülzgen, Seetha Raghavan and Hong Tat. “Embedded Alumina Nanoparticles as Diagnostic Coatings for Structures.” Proceedings of the Society for the Advancement of Material and Process Engineering 2012 Conference. May 21-24, 2012. Baltimore, Maryland. (Best paper award, 3rd place)

Gregory Freihofer, Spencer Frank, Emrecan Ergin, Ashley Jones, Amanda Stevenson, Axel Schülzgen and Seetha Raghavan and Hong Tat. “Measurement of Load Transfer Within Alumina Nanoparticle Epoxy Composites Using Piezospectroscopy.” Proceedings of the Society for the Advancement of Material and Process Engineering 2012 Conference. May 21-24, 2012. Baltimore, Maryland.

Field T., Jones A., Jansz M., Raghavan S., Okasinski J., Almer J. “Synchrotron X-Rays Monitoring Nano-Aluminum Grain Growth of a Metal Matrix Composite Under Thermo-Mechanical Conditions.” Proceedings of the 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. April 23-26, 2012. Honolulu, Hawaii.

2011

G. Freihofer, Brian Wirth and S. Raghavan. “Ex-Situ Raman Spectroscopy of Manufacturing Process for a MWNT Nanocomposite.” Proceedings of the Society for the Advancement of Material and Process Engineering 2011 Conference. May 23-26, 2011. Long Beach, California.

B. Mohan, G. Freihofer and S. Raghavan. “An In-Situ Raman Stress Measurement Method for Tensile Testing of Carbon Nanofiber/Nanotube Composites." Proceedings of the Society for the Advancement of Material and Process Engineering 2011 Conference. May 26-23, 2011. Long Beach, California.

Amanda L. Stevenson, Ashley Jones and Seetha Raghavan. “Real-Time Monitoring of an Adhesive Lap Shear Test Using Piezospectroscopy.” Proceedings of the 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. April 4-7, 2011. Denver, Colorado.

Bharathi Mohan, Gregory Freihofer and Seetha Raghavan. “Measuring Tensile Stresses in CNF/Polymer Composites Using Raman Spectroscopy.” Proceedings of the 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. April 4-7, 2011. Denver, Colorado.

Rene Diaz, Mitra Mossaddad, Anil Bozan, Seetha Raghavan, Jonathan Almer, John Okasinski, Hugo Palaez-Perez, Peter Imbrie. “In-Situ Strain Measurements of EB-PVD Thermal Barrier Coatings Using Synchrotron X-Ray Diffraction Under Thermo-Mechanical Loading.” Proceedings of the 49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition. January 7, 2011. Orlando, Florida.

2010

Amanda L. Wright & S. Raghavan. “Effects of Stress on Alumina Nanocomposites Using Piezospectroscopy.” Proceedings of the Society for the Advancement of Material and Process Engineering 2010 Conference. May 17-20, 2010. Seattle, Washington.

Gregory Freihofer, Adonay Jimenez and Seetha Raghavan. “Optical Spectra of Carbon Nanotubes for Stress Measurements of Advanced Aerospace Structures." Proceedings of the 51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. April 12-15, 2010. Orlando, Florida.

Amanda Wright, Christopher Gonzalez, Ashley Jones, Seetha Raghavan. “Piezospectroscopic Measurements on Alumina Epoxy Composites.” Proceedings of the 51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. April 12-15, 2010. Orlando, Florida.

Sendil Rangaswamy, Seetha Raghavan, Mohammad Z. Ahmad, Thomas Clarke, Chris Ellis, Sergio Tafur, Ravi Palaniappan. “High-Performance Computing Benchmark Tool for Parallel Processing of Large Models.” AIAA Infotech@Aerospace 2010. April 20-22, 2010. Atlanta, Georgia.

G. Freihofer, B. Mohan & S. Raghavan. “In-Situ Techniques in Optical Spectroscopy for the Analysis of Carbon Nanotubes.” Nanotech 2010, Chapter 1: Nanoscale Materials Characterization; pp 99-102, Anaheim, California.

2007

S. Raghavan & P.K. Imbrie. “The Development of Photo-Stimulated Luminescence Spectroscopy for 3D Stress Measurements in the Thermally Grown Oxide Layer of Thermal Barrier Coatings." Proceedings of the Materials Science and Technology 2007 Conference. September 16-20 2007. Detroit, Michigan.

S. Raghavan & P.K. Imbrie. “A 3D Stress Measurement Model for Chromium-Doped Alumina Using the Photo-Stimulated Luminescence Spectroscopy Technique." Proceedings of the 44th Annual Technical Meeting of the Society of Engineering Science. October 21-24 2007. College Station, Texas.

2005

P.K. Imbrie & S. Raghavan. “Work in Progress: A Remote E-Laboratory for Student Investigation, Manipulation and Learning." Proceedings of the 35th ASEE/IEEE Frontiers in Education Conference. Oct 19-22 2005. Indianapolis, Indiana.

2020

Johnathan Hernandez. "Experimentation and Simulation of Pulsed Eddy Current Thermography of Subsurface Aircraft Corrosive Defects." Masters Thesis, University of Central Florida, 2020 STARS (2020-56).

Remelisa Esteves. "Piezospectroscopic Sensing Systems: Multi-Scale and In-Situ Sensing Technology for Structural Integrity." Masters Thesis, University of Central Florida, 2020, STARS (2020-42).

Zachary Stein. "Degradation From CMAS Infiltration in 7YSZ EB-PVD Thermal Barrier Coatings." Undergraduate Thesis, University of Central Florida, 2020 (2020-762).

2019

Quentin Fouliard. "Characterization of Rare-Earth Doped Thermal Barrier Coatings for Phosphor Thermometry." Doctoral Dissertation, University of Central Florida, 2019, STARS.

Matthew Northam. "Investigation of PS-PVD and EB-PVD Thermal Barrier Coatings Over Lifetime Using Synchrotron X-ray Diffraction." Masters Thesis, University of Central Florida, 2019, STARS (CFE0007844).

Linda Rossmann. "Analysis of Residual Stress and Damage Mechanisms of Thermal Barrier Coatings Deposited via PS-PVD and EB-PVD." Masters Thesis, University of Central Florida, 2019, STARS (CFE0007717).

2017

Sanjida Akter Jahan. "Characterization of Mechanical Properties in Nanoparticle Reinforced Hybrid Carbon Fiber Composites Using Photoluminescence Piezospectroscopy." Masters Thesis, University of Central Florida, 2017, STARS (CFE0006886).

2016

Albert Manero II. "High-Temperature Mechanics of Aerospace Ceramic Composites via Synchrotron Radiation." Doctoral Dissertation, University of Central Florida, 2016, STARS (CFE0006836).

Alex Selimov. "Characterization of Dispersion and Residual Stress in Nanoparticle Reinforced Hybrid Carbon Fiber Composites." Undergraduate Thesis, University of Central Florida, 2016, STARS (233).

2015

Imad Hanhan. "Hybrid Carbon Fiber Alumina Nanocomposite for Non-Contact Stress Sensing Via Piezospectroscopy." Honors Thesis, University of Central Florida, 2015, STARS (CFH0004750).

2014

Sanna Siddiqui. "Synchrotron X-Ray Diffraction and Piezospectroscopy Used for the Investigation of Individual Mechanical Effects From Environmental Contaminants and Oxide Layer Undulations in Thermal Barrier Coatings." Masters Thesis, University of Central Florida, 2014, STARS (CFE0005712).

Albert Manero. "Nondestructive Analysis of Advanced Aerospace Materials via Spectroscopy and Synchrotron Radiation." Masters Thesis, University of Central Florida, 2014, STARS (CFE0005657).

Kevin Knipe. "In-Situ Synchrotron Studies of Turbine Blade Thermal Barrier Coatings Under Extreme Environments." Doctoral Dissertation, University of Central Florida, 2014, STARS (CFE0005640).

Gregory Freihofer. "Nanocomposite Coating Mechanics via Piezospectroscopy." Doctoral Dissertation, University of Central Florida, 2014, STARS (CFE0005614).

Erik Durnberg. "Load Transfer in an Isolated Particle Embedded Within an Epoxy Matrix." Masters Thesis, University of Central Florida, 2014, STARS (CFE0005326).

Daniela Fugon-Dessources. "Piezospectroscopic Calibration of Alumina-Nanocomposites for the Development of Stress-Sensing Structures." Masters Thesis, University of Central Florida, 2014, STARS (CFE0005168).

2013

Ashley Jones. "Low Strain Rate Studies of Alumina Epoxy Composites Using Piezospectroscopy." Masters Thesis, University of Central Florida, 2013, STARS (CFE0005099).

2011

Gregory J. Freihofer. "Enhancing Cnt-Composites With Raman Spectroscopy." Masters Thesis, University of Central Florida, 2011, STARS (CFE0004110).

Melan N. Jansz. “Effects of Thermo-Mechanical Loading From In-Situ Studies of EB-PVD Thermal Barrier Coatings.” Masters Thesis, University of Central Florida, 2011, STARS (CFE0004004).

Amanda L. Stevenson. "Calibration of Alumina-Epoxy Nanocomposites Using Piezospectroscopy for the Development of Stress-Sensing Adhesives." Masters Thesis, University of Central Florida, 2011, STARS (CFE0003744).

2008

Seetha Raghavan. "The Development of Photo-Stimulated Luminescence Spectroscopy for Three-Dimensional Stress Measurements." Doctoral Dissertation, Purdue University, 2008, ProQuest (3334068).

2016

Gregory Freihofer & Seetha Raghavan*. "Characterization and Performance of Stress and Damage Sensing Smart Coatings." In Majid Hosseini, ASH Maklouf (Eds), "Industrial Applications for Intelligent Polymers and Coatings," Volume 1. Springer, Germany. In Press, 2016.

2022

Perla Latorre Suarez, Quentin Fouliard and Seetha Raghavan. “Manufacturing Sensors Using Celestial Body Regolith.” U.S. Patent Application 63/394,908, filed 08/03/2022.

Quentin Fouliard, Ranajay Ghosh and Seetha Raghavan. "Rare-Earth Doped Thermal Barrier Coating Bond Coat for Thermally Grown Oxide Luminescence Sensing." U.S. Patent 11,346,006, granted 05/31/2022.

Quentin Fouliard, Ranajay Ghosh, and Seetha Raghavan. "Method for Forming a Temperature Sensing Layer Within a Thermal Barrier Coating." U.S. Patent Application 17/649,929, filed 05/19/2022.

2020

Quentin Fouliard, Ranajay Ghosh and Seetha Raghavan. “System and Method to Reveal Temperature Gradients Across Thermal Barrier Coatings Using Phosphor Thermometry.” U.S. Patent Application 17/034,156, filed 09/28/2020.

Quentin Fouliard, Ranajay Ghosh and Seetha Raghavan. “Phosphor Thermometry System for Synchronized Luminescence Lifetime Decay Measurements.” U.S. Patent Application 17/034,098, filed 09/28/2020.

2019

Ravisankar Naraparaju, Uwe Schulz, Seetha Raghavan, Estefania Bohorquez. “Non-Destructive CMAS-Infiltration Characterization of Thermal Barrier Coatings.”US Patent Pub. No. US20190293567A1, granted 09/26/2019.

2013

Seetha Raghavan, Amanda Stevenson and Ashley Jones. “Stress-Sensitive Material and Methods for Using Same.” US Patent Pub. No. 20130082191A1, granted 04/04/2013.

2006

Seetha Raghavan, Ser Yong Lim and Stephen Wong Brian. “An Apparatus for Ultrasonic Inspection of Flawed Materials.” Patent Assignee: Singapore Technologies Aerospace Ltd. (Singapore Patent Application Number 200107295-8, Publication Number: 118100), granted 02/28/2006.