在高合金中,通过化学组成和微观结构调节诱导的氧化物被动化的系统研究
Jianqiao Yu1, Panhua Shi1, Yiying Yang1
1Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai 200433, China. yxwang@fudan.edu.cn.
Physical chemistry chemical physics : PCCP
|August 14, 2025
概括
高合金 (HEAs) 显示复杂的氧化行为. 含有Cu的高温中化学短程顺序受d轨道的影响,以及粒度边界等微观结构特征显著影响氧化阻力.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 物理化学 物理化学
背景情况:
- 由于其独特的特性,高合金 (HEAs) 越来越多地被研究用于极端环境中的应用.
- 了解高氧气体的氧化行为对于其实际实施至关重要,但复杂的多元组件效应带来了挑战.
- 现有的数据科学方法在充分解释合金元素对氧化的复杂影响方面存在局限性.
研究的目的:
- 从理论角度系统地分析HEAs元素组成,局部化学环境,微观结构和热氧化行为之间的关系.
- 阐明控制高温电池氧化阻力的基本机制.
- 为优化HEA设计中的氧化电阻提供见解.
主要方法:
- 对元素组成和当地的化学环境进行理论分析.
- 对氧化途径的微观结构效应的研究.
- 热氧化行为与材料特性的相关性.
主要成果:
- 发现含有Cu的HEAs中的化学短程顺序 (CSRO) 阻碍了氧气的占用,超过了的亲和力和特定的间位点,归因于d轨道相互作用.
- 微观结构特征,特别是粒度边界 (GBs),作为氧气的加速扩散路径,影响当地化学成分.
- 被动层质量的关键因素包括微结构设计,元素组成调节以及元素化学亲和力和扩散率的变化.
结论:
- 该研究提供了对CSRO和微结构设计如何影响HEA氧化的基本理解.
- 对元素相互作用和扩散的洞察力对于开发增强高氧气体氧化抵抗的策略至关重要.
- 这项工作为优化HEA组合和微观结构以满足苛刻应用的需求提供了理论基础.
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