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论文类型：期刊论文

发表时间：2010-06-15

发表刊物：MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

收录刊物：SCIE、EI、Scopus

卷号：527

期号：15

页面范围：3416-3419

ISSN号：0921-5093

关键字：Metallic glasses; Microstructure; Ultrasonic; Elastic property

摘要：The present paper aims to study the crystallization behavior and the elastic properties of Cu58.1Zr35.9Al6 bulk metallic glass using ultrasonic pulse focusing method. It is found that the changes of the elastic properties and microstructure can be classified into three stages corresponding to different temperature regions. Below the glass transition temperature T-g, no structural change was observed by X-ray diffraction, and annealing only induced structural relaxation. After annealing at the super-cooled liquid region, the new phase Cu10Zr7 formed, meanwhile, some anomalous acoustic and elastic behaviors occurred near T-g (490). Above the onset crystallization temperature T-x, the elastic properties increased further with the elevated temperature and Cu8Zr3 phase was also observed besides Cu10Zr7 phase. The annealing has a significant effect on the elastic property and microstructure of Cu58.1Zr35.9Al6 bulk metallic glass, which is closely related to the annihilation of quenched-in free volume and the improvement of the atom order degree. (C) 2010 Elsevier B.V. All rights reserved.