Crystallization behavior and thermal stability of Al-Ni-RE metallic glasses

被引：3

作者：

Zhang Zhang ^{[1
]}

Xiong Xian-Zhong ^{[1
]}

Yi Jiao-Jiao ^{[1
]}

Li Jin-Fu ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

来源：

ACTA PHYSICA SINICA | 2013年 / 62卷 / 13期

基金：

中国国家自然科学基金;

关键词：

Al-based metallic glass; glass transition; primary phase; thermal stability; AMORPHOUS-ALLOYS; LA; MICROSTRUCTURE; FORMABILITY; STRENGTHS; ORDER; XAFS;

D O I：

10.7498/aps.62.136401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A series of Al-Ni-RE (RE = La, Ce, Y) amorphous ribbons were prepared. The crystallization behavior and primary phases were investigated using X-ray diffraction and differential scanning calorimeter, and their relationships with the alloy composition and atomic features were analyzed. Results show that if the topological instability parameter lambda was modified using effective atomic radii, the metallic glasses in an Al-Ni-RE system can be classified into nanocrystalline, nanoglassy and glassy types according to their crystallization behaviors by two critical values of the modified topological instability parameter lambda'. Linear relationships of onset temperature of crystallization and mixing enthalpy with lambda' are also clearly revealed, indicating that lambda' is closely related to the thermal stability of Al-Ni-RE metallic glasses.

引用

页数：8

共 34 条

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