Micromechanical properties of TRISO coatings by in-situ high temperature nanoindentation and microcantilever fracture
Micromechanical properties of TRISO coatings by in-situ high temperature nanoindentation and microcantilever fracture
复制标题
通过原位高温纳米压痕和微悬臂梁断裂研究 TRISO 涂层的微观机械性能
DOI:
10.1016/j.jeurceramsoc.2023.12.056
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发表时间:
2024
影响因子:
5.7
通讯作者:
Leide A
中科院分区:
文献类型:
--
作者:
Leide A
Coated nuclear fuel particles, most commonly tri-structural isotropic (TRISO), are intended for use in advanced high temperature reactors. It is vital to understand the mechanical properties of each coating layer to accurately predict the performance of these fuel particles and how these might change at each stage of their lifecycle. This paper reports results of in-situ nanoindentation, with an emphasis on the structural SiC layer, along with microcantilever testing of the critical SiC-IPyC interface. At 1000 °C the hardness of the SiC layer is ∼75% lower than at room temperature implying significantly more plasticity at the reactor operating temperature. The elastic modulus was slightly lower at 1000 °C than at room temperature. Microcantilever fracture at the SiC-IPyC interface shows that failure occurs within the pyrolytic carbon layer rather than an interfacial “debonding” with a strength similar to that of bulk pyrolytic carbon.
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