The atomic-scale mechanism for the enhanced glass-forming-ability of a Cu-Zr based bulk metallic glass with minor element additions

被引：96

作者：

Wang, Q. ^{[1
,2
]}

Liu, C. T. ^{[2
]}

Yang, Y. ^{[2
]}

Liu, J. B. ^{[2
]}

Dong, Y. D. ^{[1
]}

Lu, J. ^{[2
,3
]}

机构：

[1] Shanghai Univ, Inst Mat Sci, Key Lab Struct, Shanghai, Peoples R China

[2] City Univ Hong Kong, Dept Mech & Biomed Engn, Kowloon, Hong Kong, Peoples R China

[3] City Univ Hong Kong, Shenzhen Res Inst, Ctr Adv Struct Mat, Shenzhen, Peoples R China

来源：

SCIENTIFIC REPORTS | 2014年 / 4卷

关键词：

SHORT-RANGE ORDER; ALLOYING ADDITIONS; THIN-FILMS; CRYSTALLIZATION; ROLES;

D O I：

10.1038/srep04648

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

It is known that the glass forming-ability (GFA) of bulk metallic glasses (BMGs) can be greatly enhanced via minor element additions. However, direct evidence has been lacking to reveal its structural origin despite different theories hitherto proposed. Through the high-resolution transmission-electron-microscopy (HRTEM) analysis, here we show that the content of local crystal-like orders increases significantly in a Cu-Zr-Al BMG after a 2-at% Y addition. Contrasting the previous studies, our current results indicate that the formation of crystal-like order at the atomic scale plays an important role in enhancing the GFA of the Cu-Zr-Al base BMG.

引用

页数：5

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