晶体结构异构对金属在液体中的腐蚀特征的影响:一个分子动力学模拟研究
Na Liang1, Bin Long1, Zhangshun Ruan1
1Reactor Engineering Technology Research Institute, China Institute of Atomic Energy, Beijing 102413, China.
Materials (Basel, Switzerland)
|December 11, 2025
概括
这项研究揭示了水晶平面的方向如何使用分子动力学影响铁 (bcc) 和 (fcc) 中的腐蚀. 最密集的飞机通过调节原子分布,提供最好的耐腐蚀性.
科学领域:
- 材料科学 材料科学 材料科学
- 物理化学 物理化学
- 计算材料科学科学 计算材料科学
背景情况:
- 了解金属腐蚀对于材料的耐用性至关重要.
- 晶体结构显著影响表面特性和反应性.
- 在各种工业应用中,与金属的相互作用至关重要.
研究的目的:
- 研究身体中心立方 (bcc) 铁和面中心立方 (fcc) 与不同晶体平面的兼容性.
- 阐明这些系统中腐蚀异构性背后的机制.
- 为了建立耐腐蚀的结构-属性关系.
主要方法:
- 用分子动力学 (MD) 模拟来建模与金属的相互作用.
- 分析了Fe (bcc) 和Ni (fcc) 的不同晶体平面 ((111), (001), (110).
- 分析的重点是液体原子与晶体表面的空间分布和相互作用.
主要成果:
- 腐蚀异构性由晶体平面如何调节液体分布来决定.
- 密集的平面呈现出更高的原子密度和更宽的平面间距,最大限度地减少了原子相互作用.
- 这导致了层状的分布,防止了表面原子的溶解,增强了耐腐蚀性.
结论:
- 对于bcc Fe,耐腐蚀性如下 (110) > (001) > (111). 对于bcc Fe,耐腐蚀性如下 (110) > (001) > (111).
- 对于fcc Ni,耐腐蚀性如下 (111) > (001) > (110).
- 水晶平面结构是决定腐蚀行为和耐腐蚀性的关键因素.
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