About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Interrelated Extremes in Materials Degradation for Fission and Fusion Environments
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| Presentation Title |
Investigating the effect of high-temperature ion irradiation on the microstructures and mechanical properties of (Cr,Hf,Ta,Ti,Zr)C and (Hf,Ta,Ti,W,Zr)C compositionally complex carbides |
| Author(s) |
Caleb Schenck, Fu-Yun Tsai, Zhihan Hu, Benjamin Mejia Diaz, Ming Liu, Elizabeth Pritchett, Lin Shao, William G Fahrenholtz, Bharat Gwalani |
| On-Site Speaker (Planned) |
Caleb Schenck |
| Abstract Scope |
Compositionally complex carbides (CCCs), aka ‘high entropy carbides’, extend from studying transition metal carbides and are analogous to high entropy alloys in metals. CCCs are being considered for use in Generation-IV nuclear reactor systems, due to their high melting temperatures, good chemical stability, and resistance to irradiation degradation. While the irradiation effects on ZrC and TiC have been well reported, much less literature on the microstructural changes induced by ion-irradiation in CCCs exists, and no reports above 700°C or doses above 20 displacements per atom (dpa) were found. In this study, (Cr,Hf,Ta,Ti,Zr)C and (Hf,Ta,Ti,W,Zr)C were irradiated with C-ions at 30°C, 500°C, and 850°C at a maximum fluence of 5.7 x 1017 ions/cm2, or a SRIM predicted peak dose of 100 dpa. Positron annihilation spectroscopy, transmission electron microscopy, x-ray diffraction, and micromechanical testing were used to determine the impact of ion-irradiation on the microstructure and properties of these materials. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Nuclear Materials, Characterization |