Pressure-induced amorphous-to-amorphous reversible transformation in Pr75Al25

被引：14

作者：

Lin, C. L. ^{[1
,2
]}

Ahmad, A. S. ^{[1
,2
]}

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

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

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

Li, Y. C. ^{[3
]}

Liu, J. ^{[3
]}

Hu, T. D. ^{[3
]}

Zhang, D. X. ^{[4
]}

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

机构：

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

[2] Zhejiang Univ, Dept Mat Sci & Engn, Lab New Struct Mat, Hangzhou 310027, Peoples R China

[3] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China

[4] Zhejiang Univ, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2013年 / 114卷 / 21期

基金：

中国国家自然科学基金;

关键词：

LIQUID PHASE-TRANSITION; METALLIC-GLASS; BEHAVIOR; SILICON; ALLOY; WATER; ORDER; AL;

D O I：

10.1063/1.4841035

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A pressure-induced amorphous-to-amorphous reversible transformation was revealed in Pr75Al25 metallic glass (MG) using in situ high-pressure synchrotron x-ray diffraction technique. The transition began at about 21 GPa with a similar to 5% volume collapse and ended at about 35 GPa. This transition is reversible with hysteresis. Based on the high-pressure behaviors of Ce-based metallic glasses and Pr metal here, we suggest that the pressure-induced polyamorphic transition in Pr75Al25 MG stems from 4f-electron delocalization of Pr metal which leads to abrupt change in bond shortening. These results obtained here provide new insights into the underlying mechanism of the amorphous-to-amorphous phase transition in metallic glasses and will trigger more theoretical and experimental investigations for such transition. (C) 2013 AIP Publishing LLC.

引用

页数：3

共 25 条

[1] 4f electron delocalization and volume collapse in praseodymium metal [J].