About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Powder and Ceramic Materials Science
|
Presentation Title |
Energy Dispersive X-ray Diffraction with Synchrotron Radiation for Measurement of Residual Elastic Mismatch Strain in Composites and Coating Systems for Extreme Environments |
Author(s) |
John Ferguson, J.Y. Peter Ko, Kelly Nygren, Michael Sangid |
On-Site Speaker (Planned) |
John Ferguson |
Abstract Scope |
Energy dispersive X-ray diffraction (EDD) conducted at a high-energy synchrotron source is a powerful tool to determine bulk elastic strain in engineering materials. Residual elastic strain, resulting from the joining of multiple materials with thermal expansion mismatch, can be prevalent and detrimental to component performance. This work leverages the benefits of EDD for characterization of residual elastic mismatch strain resulting from processing and thermal exposure in two different composites for extreme environments. First, a WC-Cu ceramic-metal composite with high thermal conductivity and strength is analyzed for the relaxation of processing-induced residual tensile stress in the copper phase by subsequent thermal cycling. Next, the depth resolved residual elastic strain in two rare-earth oxide stabilized zirconia (12 mol % yttria and 6 mol % samaria) coatings, applied to a carbon-carbon composite substrate, is determined and compared between as-plasma sprayed and post-ablation torch exposed specimens. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, Surface Modification and Coatings, Other |