使用ZrC-SiC复合矩阵的分散涂层颗粒替代燃料颗粒的压缩爬行性能
Qisen Ren1,2, Yang Liu2, Runjie Fang2
1Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.
Materials (Basel, Switzerland)
|June 13, 2025
概括
这项研究调查了由ZrC-SiC复合材料和TRISO颗粒制成的核燃料颗粒的高温爬行性能. 这些发现提供了一个爬行模型,对于预测堆内行为和确保燃料元件安全至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 核工程 核工程是指核工程.
- 陶复合材料 陶复合材料
背景情况:
- 核燃料元件在运行过程中经历长时间的压力,需要研究它们的高温爬行性能.
- 了解爬行行为对于准确的堆内性能预测和核燃料安全评估至关重要.
研究的目的:
- 为了研究ZrC-SiC复合基质分散涂层颗粒燃料颗粒的压力爬行性能.
- 为了确定TRISO包装分数对爬行行为,应力指数和激活能量的影响.
- 为陶矩阵分散涂层颗粒燃料建立一个高温爬行模型.
主要方法:
- 通过粉末混合和蒸发来制备ZrC-SiC复合材料.
- 使用火花等离子烧结 (SPS) 用不同的TRISO包装分数制造分散涂层颗粒燃料颗粒.
- 压缩爬行测试在13732073 K的温度范围和5250 MPa的应力范围.
主要成果:
- 替代燃料颗粒的爬行应力指数在0.89到2.12之间.
- 对于不同的温度和应力状态来确定激活能量:457.81623.77 kJ/mol (高T,低应力) 和135.14161.59 kJ/mol (低T,高应力).
- 该研究阐明了爬行机制及其对TRISO包装分量的依赖.
结论:
- 对陶矩阵分散涂层颗粒燃料成功建立了一个全面的高温爬行模型.
- 已建立的模型为研究和应用先进的核燃料设计提供了有价值的见解.
- 实验数据为预测核燃料元素的长期性能和安全提供了关键的参考.
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