The critical cooling rate and microstructure evolution of Zr41.2Ti13.8Cu12.5Ni10Be22.5 composites by Bridgman solidification

被引：12
作者：
Cheng, J. L. [1 ]
Chen, G. [1 ,2 ]
Gao, P. [1 ,3 ]
Liu, C. T. [4 ]
Liu, Y. [1 ,5 ]
机构：
[1] Nanjing Univ Sci & Technol, Minist Educ, Engn Res Ctr Mat Behav & Design, Nanjing 210094, Peoples R China
[2] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA
[3] Shagang Grp Inspect Ctr Phys & Chem, Zhangjiagang 215625, Peoples R China
[4] Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China
[5] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117576, Singapore
来源：
INTERMETALLICS | 2010年 / 18卷 / 01期
关键词：
Glasses; metallic; Rapid solidification processing; Microstructure; BULK METALLIC-GLASS; ENHANCED PLASTICITY; FRACTURE-TOUGHNESS; FORMING ABILITY; DEFORMATION; IMPROVEMENT;
D O I：
10.1016/j.intermet.2009.06.016
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The critical cooling rate and microstructure evolution were experimentally studied at cooling rates between 0.85 and 15.34 K/s by a Bridgman technique in Vit-1 (Zr41.2Ti13.8Cu12.5Ni10Be22.5). Our results show that the sample solidified at the rate above 10.03 K/s was fully amorphous whereas the samples solidified between 1.70 and 10.03 K/s were partially amorphous with crystalline phases, and samples solidified below 1.70 K/s were essentially crystalline. As the cooling rate decreased from 15.34 K/s to 1.82 K/s, the values of T-g and T-x were around 628 K and 702 K, respectively, but the heat of crystallization (Delta H-x) decreased with decreasing cooling rate. (C) 2009 Published by Elsevier Ltd.
引用
收藏
页码：115 / 118
页数：4
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