在形成玻璃的金属中通过毫秒加热和加工进行敲击结晶.
William L Johnson1, Georg Kaltenboeck, Marios D Demetriou
1Keck Laboratory of Engineering, California Institute of Technology, Pasadena, CA 91125, USA. wlj@caltech.edu
概括
研究人员开发了一种快速加热方法来加工金属玻璃,克服了结晶的局限性. 该技术使得从以前无法加工的合金中创建复杂的形状.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
背景情况:
- 散装金属玻璃 (BMG) 具有显著的兴趣,但由于快速结晶而受到限制.
- 结晶阻碍了对BMG低冷液态和塑料加工的研究.
研究的目的:
- 通过克服结晶的局限性,开发一种加工金属玻璃的方法.
- 为了研究和形成低冷金属液体的热塑性.
主要方法:
- 金属玻璃样本以10^6 K/s的速度快速,均地加热.
- 在近adiabatic条件下,以毫秒时间尺度测量液体特性.
- 低温液体的热塑性成形使其形成复杂的形状.
主要成果:
- 在毫秒的时间内实现金属玻璃的加工",击败"结晶.
- 从边缘玻璃成型合金中成功形成复杂的网形.
- 能够访问以前无法访问的低冷液体状态和特性.
结论:
- 在毫秒的时间内快速加热和加工是克服金属玻璃结晶的可行策略.
- 这种方法扩大了BMG的可加工性,包括那些稳定性有限的BMG.
- 为低冷金属液体的实验研究和应用开辟了新的途径.
相关概念视频
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