介层对Al/Fe双金属的界面微观结构和机械性能的影响 复合造
Shiyuan Liu1, Hong Xu1,2, Baohong Zhang1
1College of Materials Science and Engineering, North University of China, Taiyuan 030051, China.
Materials (Basel, Switzerland)
|August 12, 2023
概括
将铜 (Cu) 介层添加到/铁 (Al/Fe) 双金属中,可以显著改善它们的接口粘合. 这种增强是通过优化微观结构和扩散促进实现的,从而为减少发动机重量的应用带来更高的剪切强度.
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.
- 表面工程是什么?表面工程是什么?
背景情况:
- /铁 (Al/Fe) 双金属为减少发动机重量提供了潜力.
- 由于Al和Fe的热物理性质不同,接口粘合的差异是一个关键挑战.
- 电沉积铜 (Cu) 涂层被探索为一个中间层,以提高Al/Fe双金属的性能.
研究的目的:
- 研究Cu介层厚度对Al/Fe双金属的界面微观结构和剪切强度的影响.
- 了解原子级扩散行为和界面反应.
- 为了提高Al/Fe双金属的界面粘接性能,用于实际应用.
主要方法:
- 使用热浸接和复合造用电沉积Cu介层制造Al/Fe双金属.
- 对界面微观结构和剪切强度的实验研究.
- 第一个原则和分子动力学计算来模拟扩散和界面反应.
主要成果:
- 带有5微米Cu中间层的Al/Fe双金属实现了77.65MPa的剪切强度.
- 在Al/Fe接口上没有检测到Cu元素,这表明它的作用是促进器而不是组件.
- 模拟显示Cu在750°C溶解到Al合金中,促进界面扩散并防止Fe矩阵氧化.
结论:
- 引入一个Cu中间层有效地提高了Al/Fe双金属的界面粘接性能.
- 作为扩散促进剂和保护层,克服不同热物理性质的局限性.
- 优化Cu间层厚度对于最大限度地提高轻型发动机组件中Al/Fe双金属的剪切强度至关重要.
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