Kinetics of Glass Transition and Crystallization of a Zr40Hf10Ti4Y1Al10Cu25Ni7Co2Fe1 Bulk Metallic Glass with High Mixing Entropy

被引：15

作者：

Gong, Pan ^{[1
,2
]}

Wang, Sibo ^{[1
]}

Li, Fangwei ^{[1
]}

Wang, Xinyun ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Die & Mould Technol, 1037 Luoyu Rd, Wuhan 430074, Hubei, Peoples R China

[2] Huazhong Univ Sci & Technol, Res Inst, Shenzhen 518057, Guangdong, Peoples R China

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2018年 / 49A卷 / 07期

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

ISOTHERMAL CRYSTALLIZATION; FORMING ABILITY; TEMPERATURE-DEPENDENCE; ACTIVATION-ENERGIES; ALLOY; THERMODYNAMICS; FRAGILITY; REGION;

D O I：

10.1007/s11661-018-4612-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The kinetics of glass transition and crystallization of a novel Zr40Hf10Ti4Y1Al10Cu25Ni7Co2Fe1 bulk metallic glass (BMG) with high mixing entropy have been studied by differential scanning calorimetry (DSC) and X-ray diffraction (XRD). The continuous DSC curves show five stages of crystallization at lower heating rates (20 K/min). The activation energies of glass transition were determined by Moynihan and Kissinger methods, while the activation energies of crystallization were calculated utilizing Kissinger, Ozawa, and Boswell models. The crystalline phases corresponding to each crystallization step have been found out. The kinetic fragility of Zr40Hf10Ti4Y1Al10Cu25Ni7Co2Fe1 BMG has also been evaluated. Based on the isothermal DSC curves, the Avrami exponent, evaluated from the Johnson-Mehl-Avrami equation, has been analyzed in detail. The current study reveals that the crystallization behavior of Zr40Hf10Ti4Y1Al10Cu25Ni7Co2Fe1 BMG exhibits characteristics of both the high entropy BMGs and traditional BMGs with a single principal element, leading to its high glass-forming ability.

引用

页码：2918 / 2928

页数：11

共 54 条

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