Specific heat capacities of Fe-Co-Cr-Mo-C-B-Y bulk metallic glasses and their correlation with glass-forming ability

被引：16

作者：

Lu, Yunzhuo ^{[1
]}

Huang, Yongjiang ^{[2
]}

Lu, Xing ^{[1
]}

Qin, Zuoxiang ^{[1
]}

Shen, Jun ^{[3
]}

机构：

[1] Dalian Jiaotong Univ, Sch Mat Sci & Engn, Dalian 116028, Peoples R China

[2] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China

[3] Tongji Univ, Sch Mat Sci & Engn, Shanghai 200092, Peoples R China

来源：

MATERIALS LETTERS | 2015年 / 143卷

基金：

中国国家自然科学基金;

关键词：

Amorphous materials; Thermal analysis; Specific heat capacity; Glass-forming ability; THERMODYNAMICS; RELAXATION; ALLOY; TRANSITION; KINETICS; ENTROPY; LIQUID; TI;

D O I：

10.1016/j.matlet.2014.12.117

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The practical applications of Fe-based bulk metallic glasses (BMGs) have been seriously restricted due to their small critical sizes. Understanding the underlying factors governing the glass-forming ability (GFA) of Fe-based BMGs is the essence to solve this problem. Here, the specific heat capacities (C-p) of amorphous and crystalline Fe-Co-Cr-Mo-C-B-Y alloys have been investigated in detail. A parameter, configurational entropy, based on the difference in C-p between BMG and its crystalline counterpart, has been used to correlate with GFA. The alloy containing 7% Co with the lowest configurational entropy is expected to possess the highest viscosity and most ordered atomic structure, which may stabilize the glassy structure, resisting the crystallization and thus enhancing the glass-forming ability of Fe-based BMGs. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：191 / 193

页数：3