在单轴变形下Pt-CNT复合材料的机械性能:张力和压缩
Ustina I Yankovaskaya1, Elena A Korznikova2,3, Sofia D Korpusova4
1Department of Physics, Polzunov Altai State Technical University, Barnaul 656038, Russia.
Materials (Basel, Switzerland)
|June 10, 2023
概括
-碳纳米管 (CNT) 复合材料显示了增强的机械性能,Young的增加率达到60%.
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:
- 金属矩阵复合材料 (MMC) 为先进的应用提供了量身定制的性能.
- 碳纳米管 (CNT) 增强金属,如-CNT (Pt-CNT) 复合材料,有望提高功能特性和降低密度.
- 了解Pt-CNT复合材料在不同条件下的机械行为对于其实际实施至关重要.
研究的目的:
- 在单轴变形下研究Pt-CNT复合材料的机械特性和结构特征.
- 分析温度和CNT质量分数对复合材料机械反应的影响.
- 评估 CNTs 在白金矩阵中的增强潜力.
主要方法:
- 用分子动力学模拟来研究Pt-CNT复合材料的机械行为.
- 模拟涵盖了300K至1500K的温度范围内的单轴张力和压缩变形.
- 这项研究考虑了直径从6.62到16.55 Å 的 CNTs.
主要成果:
- 与纯相比,Pt-CNT复合材料的Young模量增加了约60%,这归因于CNTs的高轴刚性.
- 所有模拟样本的产量和抗拉强度随着温度的增加而下降.
- 这些机械特性首次用于Pt-CNT复合材料的计算.
结论:
- 碳纳米管是金属矩阵复合材料在拉伸应变下的有效增强材料.
- 由于CNT增强,Pt-CNT复合材料具有显著增强的刚性.
- 温度对Pt-CNT复合材料的机械强度起着至关重要的作用.
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