通过组合方法探索金属合金原子间结合和耐腐蚀性之间的相关性
Liwei Hu1,2, Fucheng Li1, Weijie Xie1
1Institute of physics, Chinese Academy of Science, Beijing, 100190, China.
概括
发现耐腐蚀合金至关重要. 这项研究表明,金属-金属和金属-氧结合强度指导合金的选择,使得更高耐久性的优质材料的开发速度更快.
科学领域:
- 材料科学 材料科学 材料科学
- 腐蚀工程 腐蚀工程
- 计算材料设计设计 计算材料设计
背景情况:
- 金属合金对基础设施至关重要,但腐蚀限制了它们的使用寿命并增加了维护成本.
- 评估合金耐腐蚀性是复杂和耗时的,阻碍了新材料的发现.
- 了解影响腐蚀的因素是开发更耐用的合金的关键.
研究的目的:
- 建立一种更快,更有效的方法来发现具有出色耐腐蚀性的金属合金.
- 确定与耐腐蚀性相关的关键材料特性.
- 为选择合金元素提供预测模型,以提高合金的耐用性.
主要方法:
- 在8个合金系统中制备和表征1874种合金,使用组合方法.
- 分析合金成分与耐腐蚀性之间的相关性.
- 研究原子间相互作用,特别是金属-金属 (εM-M) 和金属-氧 (εM-O) 键强度.
主要成果:
- 耐腐蚀性与金属-金属键强度 (εM-M) 和金属-氧键强度 (εM-O) 密切相关.
- 具有高 εM-M 和 εM-O 的合金元素增强了耐腐蚀性.
- 添加具有高结合强度的元素可以降低基本合金系统中耐腐蚀性所需的临界重量平均结合强度.
结论:
- 金属与金属和金属与氧的结合强度是预测和提高合金耐腐蚀性的关键指标.
- 合金元件的εM-M和εM-O引导选择是一种适用于不同合金系统的多功能方法.
- 这些发现有助于快速发现具有卓越性能和延长使用寿命的新型金属合金.
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