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洞察Ti₃AlC₂/Mg接口的异质核化机制,通过使用第一个原理计算来添加合金元素

Mingjie Wang^1,2,3, Ding Wei², Luya Wang²

¹School of Materials Science and Engineering, Shanghai University Shanghai 200444 China 15513882577@163.com hxzheng@shu.edu.cn.

|March 21, 2025

概括

由于Mg-C键,C ((TiC) 终结的Ti3AlC2 ((0001) / Mg ((0001) 接口表现出高稳定性,促进复合材料中的异质核化. 使用Fe,Mn,Si,Al和Ni的合金增强了粘合力,而Cu的添加阻碍了它.

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:

矩阵复合材料提供了增强的机械性能.
控制异质核化对于优化复合材料性能至关重要.
了解接口属性是设计先进材料的关键.

研究的目的:

为了研究Ti3AlC2 ((0001) / Mg ((0001)) 接口的粘附,接口能量和电子结构.
阐明Ti3AlC2在Mg矩阵复合材料中的异质核化机制.
评估合金元素对接口稳定性和核化的影响.

主要方法:

用第一原则计算来研究接口属性.
对粘附作用,界面能量和电子结构的分析.
研究与各种合金元素的原始和混合Ti3AlC2 ((0001) / Mg ((0001)) 接口.

主要成果:

与HCP堆叠的C ((TiC) 终结的Ti3AlC2 ((0001) / Mg ((0001) 接口显示出高稳定性,归因于强大的Mg-C共价键.
与Fe,Mn,Si,Al和Ni合金显著增强粘附性,降低界面能量,促进核化.
在接口上添加Cu会降低粘合力,阻碍Ti3AlC2在Mg矩阵上的核化.

结论:

Ti3AlC2颗粒作为粒异质核化的有效基质,提高了强度和延展性.
这项研究为Ti3AlC2/Mg接口的核化提供了机械的理解.
通过合金来定制接口组成为开发先进的基于的复合材料提供了一条途径.

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