单晶在不同应变速率下对单晶的无otropic 机械性能进行研究
Zhongwang Tian1,2, Wei Xue2, Wenzhong Lou1
1School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China.
Micromachines
|July 30, 2025
概括
应变率显著影响单晶.
科学领域:
- 材料科学 材料科学 材料科学
- 固体力学 固体力学是什么
- 晶体学 晶体学是指结晶学.
背景情况:
- 单晶是半导体制造中的关键材料.
- 了解其在不同条件下的机械性能对于设备可靠性至关重要.
- 机械行为中的无异性是单晶的关键特征.
研究的目的:
- 为了研究延展率对单晶异型机械性能的影响.
- 分析不同晶体定向和延展率对机械反应的影响.
- 提供关于材料在动态负载条件下的行为的见解.
主要方法:
- 进行了纳米沉积试验,以评估硬度,弹性模量和断裂性.
- 进行了微拉伸压缩测试,以评估真正的应力应变行为和骨折强度.
- 实验是在室温下进行的,涉及一系列的应变速率.
主要成果:
- 弹性模量独立于拉伸率,而硬度则随着拉伸率的提高而增加.
- 断裂性表现出显著的异构性,<100>方向显示最低值 (0.691 MPa·m1/2) 和<110>最高值 (0.797 MPa·m1/2).
- 面向100的断裂强度从117 MPa增加到550 MPa,因为应变速率从0.001 s-1上升到0.01 s-1.
结论:
- 应变速率在确定单晶的机械性质方面起着至关重要的作用.
- 不同类型的断裂性和取决于拉伸率的强度突出显示了晶体方向在机械设计中的重要性.
- 这些发现对于优化基于的微电子和MEMS设备的性能和可靠性至关重要.
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