Pressure-induced amorphous-to-amorphous configuration change in Ca-Al metallic glasses

被引：47

作者：

Lou, H. B. ^{[1
,2
,3
]}

Fang, Y. K. ^{[1
,2
,3
]}

Zeng, Q. S. ^{[1
,2
,3
]}

Lu, Y. H. ^{[1
,2
,3
]}

Wang, X. D. ^{[1
,2
,3
]}

Cao, Q. P. ^{[1
,2
,3
]}

Yang, K. ^{[4
]}

Yu, X. H. ^{[4
]}

Zheng, L. ^{[5
]}

Zhao, Y. D. ^{[5
]}

Chu, W. S. ^{[5
,6
]}

Hu, T. D. ^{[5
]}

Wu, Z. Y. ^{[5
,6
]}

Ahuja, R. ^{[1
,2
,3
,7
,8
]}

Jiang, J. Z. ^{[1
,2
,3
]}

机构：

[1] Zhejiang Univ, Int Ctr New Struct Mat, Hangzhou 310027, Zhejiang, Peoples R China

[2] Zhejiang Univ, Lab New Struct Mat, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China

[3] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China

[4] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201203, Peoples R China

[5] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing, Peoples R China

[6] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China

[7] Uppsala Univ, Dept Phys, Condensed Matter Theory Grp, Uppsala, Sweden

[8] Royal Inst Technol KTH, Dept Mat Sci & Engn, Stockholm, Sweden

来源：

SCIENTIFIC REPORTS | 2012年 / 2卷

基金：

中国国家自然科学基金;

关键词：

PHASE; BEHAVIOR; TRANSITION; CALCIUM; ORDER;

D O I：

10.1038/srep00376

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：

Pressure-induced amorphous-to-amorphous configuration changes in Ca-Al metallic glasses (MGs) were studied by performing in-situ room-temperature high-pressure x-ray diffraction up to about 40 GPa. Changes in compressibility at about 18 GPa, 15.5 GPa and 7.5 GPa during compression are detected in Ca80Al20, Ca72.7Al27.3, and Ca66.4Al33.6 MGs, respectively, whereas no clear change has been detected in the Ca50Al50 MG. The transfer of s electrons into d orbitals under pressure, reported for the pressure-induced phase transformations in pure polycrystalline Ca, is suggested to explain the observation of an amorphous-to-amorphous configuration change in this Ca-Al MG system. Results presented here show that the pressure induced amorphous-to-amorphous configuration is not limited to f electron-containing MGs.

引用

页数：4

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