Hard rhenium-boron-cobalt amorphous alloys with a wide supercooled liquid region

被引：5
|
作者：
Wang, Jianfeng [1 ]
Zhu, Shijie [1 ]
Wang, Liguo [1 ]
Guan, Shaokang [1 ]
Li, Ran [2 ]
Zhang, Tao [2 ]
机构：
[1] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China
[2] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 645卷
关键词：
Rhenium alloys; Amorphous alloys; Supercooled liquid region; Hardness; Young's modulus; BULK METALLIC GLASSES; ELASTIC-CONSTANTS; SUPERHARD MATERIALS; ULTRAHIGH STRENGTH; MODULUS; INDENTATION; TEMPERATURE; PLASTICITY;
D O I：
10.1016/j.msea.2015.08.023
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Novel Re-B-Co amorphous alloys with compositions of Re65-xB35Cox (at%, x=25, 30, 35, 40, 45, and 50) were fabricated by single-roller melt spinning. These alloys were found to exhibit a clear glass transition phenomenon. The width of supercooled liquid region (Delta T-x) is in the range of 52-71 K. Such a large Delta T-x allows us to produce amorphous alloy bulks by thermoplastic forming. The Vickers hardness is up to 19.10 GPa for the Re40B35CO25 alloy, which is close to that reported for some hard covalent crystals. Thus, the present alloys with a combination Of large Delta T-x and high hardness are expected to be used as a new type of structural materials. Furthermore, the relationships of hardness with glass transition temperature and Young's modulus were also discussed. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：122 / 125
页数：4
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