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[原创]物理所BMG工作进展  

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发表于 2017-1-16 23:22 |显示全部帖子
和李茂枝教授合作关于非晶合金中局域五次对称性的综述, 发表在在Chin Phys B 上。

The structure of metallic glasses has been a long-standing mystery. Owing to the disordered nature of atomic structures in metallic glasses, it is a great challenge to find a simple structural description, such as periodicity for crystals, for establishing the structure-property relationship in amorphous materials. In this paper, we briefly review the recent developments of the five-fold local symmetry in metallic liquids and glasses and the understanding of the structure-property relationship based on this parameter. Experimental evidence demonstrates that five-fold local symmetry is found to be general in metallic liquids and glasses. Comprehensive molecular dynamics simulations show that the temperature evolution of five-fold local symmetry reflects the structural evolution in glass transition in cooling process and the structure-property relationship such as relaxation dynamics, dynamic crossover phenomena, glass transition, and mechanical deformation, in metallic liquids and glasses can be well understood base on the simple and general structure parameter of five-fold local symmetry.

Chin Phys B17-Five-fold local symmetry in MGs.pdf

873.21 KB, 下载次数: 6

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发表于 2017-1-18 14:56 |显示全部帖子
本帖最后由 wangwhiop 于 2017-1-18 14:56 编辑

刘明等合成出柔性、稳定性高的非晶合金膜。 结果发表在APL上。

Flexible amorphous metal films with high stability

M. Liu, C. R. Cao, Y. M. Lu, W. H. Wang, H. Y. Bai

Abstract
We report the formation of a large-area of more than 100 cm2 amorphous Cu50Zr50 films. The films were fabricated by ion beam assisted deposition with slow deposition rate at moderate temperature. The amorphous films have markedly enhanced thermal stability, excellent flexibility and high reflectivity with atomic level smoothness. The multifunctional properties of the amorphous films are favorites in the promising applications of smart skin or wearable devices. The method of preparing highly stable amorphous metal films by tuning the deposition rate instead of deposition temperature could pave a way for exploring amorphous metal films with unique properties.

APL17-Flexible amorphousl films with high stability.pdf

1.35 MB, 下载次数: 38

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发表于 2017-1-24 19:18 |显示全部帖子
thanks         

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发表于 2017-2-7 08:41 |显示全部帖子
各位老师辛苦了!

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发表于 2017-3-20 13:16 |显示全部帖子
本帖最后由 wangwhiop 于 2017-3-20 13:17 编辑

王超等利用高压实现Rejuvenation,合成高能量非晶合金。 这类非晶合金具有比非晶背底还高的密度和能量的区域--负流变单元。 文章发表在Appl. Phsy Lert.. 110, 111901 (2017); doi: 10.1063/1.4978600

APL17-negative flow untis in MG under HP.pdf

1.27 MB, 下载次数: 28

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