High-pressure annealing driven nanocrystal formation in Zr50Cu40Al10 metallic glass and strength increase
High-pressure annealing driven nanocrystal formation in Zr50Cu40Al10 metallic glass and strength increase
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DOI：
10.1038/s43246-020-00057-3
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发表时间：
2020-08
影响因子：
7.8
通讯作者：
Y. Shibazaki;R. Yamada;J. Saida;Y. Kono;M. Wakeda;K. Itoh;M. Nishijima;K. Kimoto
中科院分区：
文献类型：
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作者：
Y. Shibazaki;R. Yamada;J. Saida;Y. Kono;M. Wakeda;K. Itoh;M. Nishijima;K. Kimoto
压力诱导的金属玻璃结构变化一直是人们极大的兴趣，因为它们有望开辟新的方法来合成具有意想不到的性能的新材料。本文通过原位X射线结构测量和性能分析，研究了高温高压同时处理对Zr50Cu40Al10非晶合金结构和性能的影响。我们发现了不寻常的形成富铜纳米晶体在高压和高温下，伴随着显着的强度和硬度增强。基于反向蒙特卡罗模拟和分子动力学模拟，在高压和高温下，金属玻璃的结构变成了一个密集的，化学均匀的配置与高的短程和中程有序。这些结果表明，高压退火工艺提供了一种在不改变其组成的情况下改善和控制性能的新方法。
Pressure-induced structural changes in metallic glasses have been of great interest as they are expected to open new ways to synthesize novel materials with unexpected properties. Here, we investigated the effect of simultaneous high-pressure and high-temperature treatment on the structure and properties of a Zr50Cu40Al10metallic glass by in situ X-ray structure measurement and property analysis of the final material. We found the unusual formation of Cu-rich nanocrystals at high pressure and temperature, accompanied by significant strength and hardness enhancement. Based on reverse Monte Carlo modeling and molecular dynamics simulations, the structure of the metallic glass changed to a densely packed, chemically uniform configuration with high short-range and medium-range ordering at high pressure and temperature. These results show that high-pressure annealing processes provide a new way to improve and control properties without changing their composition.