Multiscale structures and phase transitions in metallic glasses: A scattering perspective

Multiscale structures and phase transitions in metallic glasses: A scattering perspective
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金属玻璃中的多尺度结构和相变:散射视角

DOI:
10.1088/1674-1056/26/1/017104
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发表时间:
2017
期刊:
Chinese Physica B
影响因子:
--
通讯作者:
Wang Xunli
Wang Xunli
中科院分区:
其他
文献类型:
--
作者:
Lan Si;Wu Zhenduo;Wang Xunli

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非晶态材料在人类社会中普遍存在并广泛应用,但其结构远未完全了解。金属玻璃是一类新型的非晶材料,由于其优异的性能而引起了人们的极大兴趣。近年来,由于先进仪器的发展,如原位X射线和中子散射,我们对金属玻璃的了解急剧增加。本文对近年来金属玻璃结构的研究进展作一简要综述。特别是,我们将强调,从散射的角度来看,多尺度结构的金属玻璃,即,短到中等范围的原子包装,和相变在过冷液体区域,例如,结晶和液-液相变。我们还将讨论,基于对它们的结构和相稳定性的理解,金属玻璃的机械和磁性。
Amorphous materials are ubiquitous and widely used in human society, yet their structures are far from being fully understood. Metallic glasses, a new class of amorphous materials, have attracted a great deal of interests due to their exceptional properties. In recent years, our understanding of metallic glasses increases dramatically, thanks to the development of advanced instrumentation, such as in situ x-ray and neutron scattering. In this article, we provide a brief review of recent progress in study of the structure of metallic glasses. In particular, we will emphasize, from the scattering perspective, the multiscale structures of metallic glasses, ie, short-to-medium range atomic packing, and phase transitions in the supercooled liquid region, eg, crystallization and liquid-to-liquid phase transition. We will also discuss, based on the understanding of their structures and phase stability, the mechanical and magnetic properties of metallic glasses.
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