通过第一原则计算,揭示CoCrFeNi高透合金/合金复合物的接口特性和粘合能力
Yunzi Liu1, Yong Gao2, Jian Chen1
1School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an 710021, China.
Materials (Basel, Switzerland)
|October 28, 2023
概括
(Al) 原子强烈地与CoCrFeNi高合金 (HEA) 水晶结构结合. 这项研究揭示了从2D吸附到3D散装结合的Al沉积过渡,形成复合材料设计的稳定接口.
科学领域:
- 材料科学 材料科学 材料科学
- 计算材料科学科学 计算材料科学
- 表面科学是一门学科.
背景情况:
- 高合金 (HEAs) 由于其复杂的组成,具有独特的特性.
- 了解接口粘合对于开发先进的复合材料至关重要.
- (Al) 是金属矩阵复合材料的常见矩阵材料.
研究的目的:
- 在CoCrFeNi HEA晶体平面上研究Al原子的原子结合和结构特征.
- 为了确定Al/CoCrFeNi HEA接口的稳定性和粘合强度.
- 为设计用CoCrFeNi HEA增强的Al矩阵复合材料提供理论基础.
主要方法:
- 使用第一原则计算来模拟原子相互作用.
- 分析晶体结构,晶格常数和化学结合.
- 调查电荷分布差异和结合能量的研究.
主要成果:
- CoCrFeNi HEA 模型表现出一个稳定的晶体结构.
- 观察到强大的接口结合,结合能小于-16.21 eV.
- 从2D化学吸附到3D化学结合的阶段过渡确定了Al原子的沉积增加.
- 发现了Al和CoCrFeNi原子之间的电荷转移和化学键的证据,表明具有低不匹配应力的稳定接口.
结论:
- 原子与CoCrFeNi HEA形成强大的化学键.
- 接口表现出稳定性和低不匹配应力,适合复合材料应用.
- 这项研究为制造CoCrFeNi HEA增强Al矩阵复合材料提供了理论见解.
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