铁/微合金对SiC/Al复合材料界面调节的影响:分子动力学模拟和实验
Tianpeng Song1, Xiaoshuang Du1, Tao Xia1
1School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
Materials (Basel, Switzerland)
|January 28, 2026
概括
使用Fe和Ni微合金SiC/Al复合材料可以防止在接口上形成脆性相. 这种原子层次的理解提高了强度和可塑性,这对于先进的材料应用至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 机械工程 机械工程
背景情况:
- 碳化 (SiC) / (Al) 复合材料在制造过程中面临着脆弱的碳化 (Al4C3) 形成的挑战.
- 这一阶段限制了SiC/Al复合材料的机械性能和工程应用.
- 微合金是一种已知的减轻脆相形成的策略,但原子尺度界面机制尚未完全理解.
研究的目的:
- 研究SiC/Al复合材料中铁 (Fe) 和 (Ni) 微合金的原子尺度接口机制.
- 阐明微合金如何调节接口并优化机械性能.
- 为设计先进的SiC/Al复合材料提供理论指导.
主要方法:
- 用分子动力学模拟来研究SiC/Al界面上的原子相互作用.
- 实验验证,包括压力透-热挤出和相位检测,用于验证模拟结果.
- 进行了机械性能测试,以评估微合金的影响.
主要成果:
- 铁和原子在SiC/Al接口上优先分离,抑制有害的接口反应.
- 微合金促进脱位核,扩散和新脱位类型的形成,增强机械行为.
- 微合金表现出更显著的强化效应,在没有Al4C3形成的情况下,强度柔性产品增加了54%.
结论:
- 铁和微合金有效地抑制了SiC/Al复合材料中脆性Al4C3相的形成.
- 微合金通过原子尺度的接口调节,使得强度和可塑性的协同改进.
- 这项研究提供了对微合金机制的关键原子层次见解,支持高性能SiC/Al复合材料的开发.
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