晶态高熵合金中的准局域模
Quasi-localized modes in crystalline high entropy alloys
摘要：
高熵合金（HEAs）是通过将多种金属物质以几乎相同的量混合而设计的，以获得具有优异机械性能的结晶或非晶材料。在这里，我们使用分子动力学模拟的位置和成分的混乱，在确定的CrMnFeCoNi HEAs的低频振动特性的作用。我们的研究结果表明，预期的依赖关系的状态密度的频率作为$D(ω)\simω^4$恢复非晶HEAs，也观察到部分结晶的合金与偏差，取决于结晶的程度。我们发现，准本地化的振动仍然是可见的结晶HEAs，虽然抑制相比，相应的非晶合金。我们的工作提供了一个统一的角度来描述HEA的力学性能方面的振动态密度。
英文摘要：
High Entropy Alloys (HEAs) are designed by mixing multiple metallic species in nearly the same amount to obtain crystalline or amorphous materials with exceptional mechanical properties. Here we use molecular dynamics simulations to investigate the role of positional and compositional disorder in determining the low-frequency vibrational properties of CrMnFeCoNi HEAs. Our results show that the expected dependence of the density of states on the frequency as $D(ω)\simω^4$ is recovered for amorphous HEAs and is also observed for partially crystallized alloys with deviations that depend on the degree of crystallization. We find that the quasi-localized vibrations are still visible in crystalline HEAs, albeit suppressed compared to the corresponding amorphous alloys. Our work offers a unified perspective to describe HEA mechanical properties in terms of their vibrational density of states.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
