As a potential substitute material for metal and concrete in producing nuclear waste storage canisters, silicon carbide (SiC) can be subjected to various mechanical and thermal influences during its lifetime. To investigate the reliability of SiC in situ, especially in unusual cases involving impact load and high temperature, dynamic mechanical tests are performed on heated SiC utilizing the Split Hopkinson Pressure Bar (SHPB) system. Before the mechanical tests, thermal shock (TS) treatments are applied on the SiC specimens before the mechanical tests, where the heated specimens are cooled in air and water to provide different cooling rates. The test results indicate no discernable variation of dynamic compressive strength after heating at 100 °C. Evident drop of strength value is observed at heating levels higher than 200 °C. It is also found that with approximately the same incident energy, the energy absorbed by the specimen decreases with ascending cooling rate. The scanning electron microscopy (SEM) technique is also utilized to provide explanations for the corresponding test results whereby the damage mechanisms of thermal shock on SiC are analyzed.

作为生产核废料储存罐的金属和混凝土的潜在替代材料，碳化硅（SiC）在其使用寿命期间会受到各种机械和热影响。为了研究SiC的现场可靠性，特别是在涉及冲击载荷和高温的异常情况下，利用分流式霍普金森压力棒（SHPB）系统对加热的SiC进行了动态力学测试。在机械测试之前，在机械测试之前对SiC样品进行热冲击（TS）处理，其中加热的样品在空气和水中冷却以提供不同的冷却速率。测试结果表明，在100°C加热后，动态抗压强度没有明显变化。在高于200°C的加热水平下观察到强度值明显下降。还发现，在近似相同的入射能量下，样品吸收的能量随着冷却速率的增加而降低。扫描电子显微镜（SEM）技术也可用于解释相应的测试结果，从而分析热冲击对SiC的破坏机理。