Fabrication of Al-based bulk metallic glass by mechanical alloying and vacuum hot consolidation

被引：38
|
作者：
Wei, Xiu [1 ]
Han, Fusheng [1 ]
Wang, Xingfu [1 ]
Wang, Xinfu [1 ]
Wen, Cui'e [2 ]
机构：
[1] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
[2] Deakin Univ, Inst Technol & Res Innovat, Ctr Mat & Fiber Innovat, Geelong, Vic 3217, Australia
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 501卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Mechanical alloying; Bulk metallic glass; Al-based alloy; Vacuum hot pressing; Thermal stability; CRYSTALLIZATION KINETICS; MATRIX COMPOSITES; FORMING ABILITY; WARM EXTRUSION; PHASE; NI; BEHAVIOR;
D O I：
10.1016/j.jallcom.2010.04.069
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 Al75Ni10Ti10Zr5 bulk amorphous alloys have been synthesized by mechanical alloying and vacuum hot pressing. The as-milled powders and hot pressed samples were examined by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and differential scanning calorimetry. The Al75Ni10Ti10Zr5 amorphous powders with a high crystallization temperature of 790 K and a large supercooled liquid region of 49 K were prepared by ball milling elemental powder mixtures for 110 h. The bulk Al75Ni10Ti10Zr5 amorphous alloy was prepared by hot pressing at 733 K for 20 min under a pressure of 3 GPa. The Kissinger analysis indicated that the bulk metallic glasses exhibit high thermal stability. The Vickers microhardness of the bulk samples is in the range of 790-850 HV. The crack paths surrounding the indents of all these samples emanate from the indent corners, indicating that the propagation of cracks occurred by radiation. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：164 / 167
页数：4
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