辐射驱动的纳米晶体ThO2和Th1-x薄膜的重组
Noah Cabanas1, Khachatur V Manukyan2, Daniel Robertson2
1Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States.
ACS applied materials & interfaces
|February 9, 2026
概括
合成了二氧化 (ThO2) 和氧化 (Th1-xUxO2) 薄膜,并对其进行辐射,以评估辐射损伤. Th0.85U0.15O2薄膜表现出卓越的稳定性,这对于核燃料应用至关重要.
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.
- 固态物理 固态物理
背景情况:
- 动氨酸氧化物材料对于核燃料应用至关重要.
- 了解辐射引起的结构变化对于材料开发和安全至关重要.
研究的目的:
- 为了合成ThO2和Th1-xU_xO2 (x = 0.15,0.50) 薄膜.
- 为了研究这些薄膜对离子辐射的反应,模拟反应堆条件.
- 为了将含量与辐射损伤易感性和结构完整性相关联.
主要方法:
- 电子喷雾辅助溶液燃烧合成用于薄膜制造.
- 克里普顿离子辐射高达1 x 10^16离子/厘米2.2.
- 高分辨率扫描传输电子显微镜 (STEM),能量分散式X射线光谱 (EDS) 和电子能量损失光谱 (EELS) 用于分析.
主要成果:
- 二氧化薄膜显示出显著的损伤,包括空洞形成和分层.
- Th0.85U0.15O2薄膜表现出高稳定性,颗粒生长适度,没有空隙.
- Th0.5U0.5O2薄膜经历了广泛的损伤,氧气的位移作为主要降解驱动器.
- 在所有组合物中观察到最小的活性化物损失,表明机械强度.
结论:
- 在Th1-xU_xO2系统中,辐射引起的损伤严重依赖于含量.
- Th0.85U0.15O2 是稳定的核燃料材料的有希望的候选物.
- 这些发现为先进的核燃料和目标开发的辐射损害机制提供了关键的见解.
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