Specific Heat in a Typical Metallic Glass Former  

作　　者：KE Hai-Bo ZHAO Zuo-Feng WEN Ping WANG Wei-Hua 柯海波;赵作峰;闻平;汪卫华(Institute of Physics,Chinese Academy of Sciences,Beijing 100190)

机构地区：[1]Institute of Physics,Chinese Academy of Sciences,Beijing 100190

出　　处：《Chinese Physics Letters》2012年第4期157-160,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 50890171,50921091 and 51071170;the National Basic Research Program of China under Grant Nos 2007CB613904 and 2010CB731603;Chinese Academy of Sciences.

摘　　要：The specific heat in a typical Pd_(40)Ni_(10)Cu_(30)P_(20) metallic glass forming system is investigated.It is found that the specific heat of the metallic liquid is around 4.7R (R is the gas constant) and that it is almost independent of temperature.The glass transition observed during cooling is accompanied by a decrease in the specific heat of 1.5R.The specific heat of the metallic glass is similar to that of its crystalline phases,contributed mainly from atomic vibrations.Combined with the results of the structural relaxation and diffusivities,we demonstrate an intrinsic connection between the atomic motion and the specific heat in the metallic glass-forming liquid.The results support the idea that glass transition is a process accompanied by the freezing of most of the atomic transitional motions in a metallic supercooled liquid during cooling.

关 键 词：temperature METALLIC GLASS 

分 类 号：TG1[金属学及工艺—金属学]