Cu-based bulk metallic glasses designed by stability evaluations of liquid and amorphous phases

作     者：纪秀林 潘冶 赵建华 林萍华 

作者机构：Engineering Research Center of Dredging Technology of Ministry of EducationHohai University School of Materials Science and EngineeringSoutheast University 

基　　金：Project (XZY/08B007-02) supported by Scientific Research Starting Foundation for Doctors in Hohai University  China 

出 版 物：《中国有色金属学会会刊：英文版》 (Transactions of Nonferrous Metals Society of China)

年 卷 期：2009年第19卷第S3期

页      码：630-633页

摘      要：From the point of translation from liquid to amorphous phase, a new approach for composition design of bulk metallic glasses (BMGs) was suggested based on the stability estimations of liquid and amorphous phases. Gibbs free energy (△G) of liquid phase, which can be calculated approximately using mixing enthalpy (△Hmix) and configuration entropy (Sconfig), was taken as a stability criterion of liquid phase. On the other hand, vacancy formation energy (△Hh) was used to evaluate the stability of amorphous phase due to the linear relationship between △Hh and crystallization temperature (Tx). Based on these two sides, new Cu-Zr-Nd bulk metallic glasses were designed and synthesized successfully by suction-casting into copper mold. Experimental results about glass-forming ability are consistent with the computational values, which not only proves the validity of the new approach for composition design but also shows the new BMG of Cu60.5Zr34Nd5.5 can be cast into amorphous alloys with 2 mm in diameter.

主 题 词：metallic glasses glass forming ability vacancy formation energy composition design 

学科分类：08[工学] 080502[080502] 0805[工学-能源动力学] 

核心收录：

D　O　I：10.1016/S1003-6326(10)60122-7

馆 藏 号：203892357...