含有纳米颗粒密度均分散的的加工和特性
Lian-Yi Chen1,2,3, Jia-Quan Xu2, Hongseok Choi4
1Scifacturing Laboratory, Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, California 90095, USA.
Nature
|December 25, 2015
概括
研究人员开发了一种新方法,在中均分散碳化纳米颗粒,显著提高其强度,刚性和可塑性.
科学领域:
- 材料科学
- 纳米技术
- 金属工程
背景情况:
- 的特性 (轻量,丰富,生物相容) 在航空航天,汽车和生物医学领域提供了潜力.
- 传统的加工方法限制了的增强性能.
- 纳入陶颗粒可以提高强度,但往往会降低塑性;纳米颗粒难以均分散.
研究的目的:
- 在矩阵中实现碳化物纳米颗粒的密度和均分散.
- 克服传统金属复合材料制造方法的局限性.
- 为了增强的机械和热性能.
主要方法:
- 在化金属中利用纳米粒子自我稳定机制.
- 在中成功分散14%的碳化纳米粒子.
- 结果的纳米颗粒复合材料的特征.
主要成果:
- 在中实现了化碳纳米颗粒的密度和均分散.
- 同时增强强度,刚性,可塑性和高温稳定性.
- 与大多数结构金属相比,由此产生的复合材料具有更高的特异性强度和特异性模量.
结论:
- 一种新的方法使得中纳米颗粒能够均分散,克服了以前的限制.
- 开发的纳米颗粒复合物表现出异常多种性能增强.
- 这一突破为高性能结构材料提供了一个新阶层.
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