Effects of crystallization on low-temperature specific heat capacity of Cu_(60)Zr_(20)Hf_(10)Ti_(10) bulk metallic glass  

晶化过程对Cu_(60)Zr_(20)Hf_(10)Ti_(10)块体金属玻璃低温比热容的影响(英文)

作　　者：王志新[1] 孙斌[1] 卢金斌[1] 

机构地区：[1]中原工学院材料与化工学院,郑州450007

出　　处：《Transactions of Nonferrous Metals Society of China》2011年第6期1309-1313,共5页中国有色金属学报（英文版）

基　　金：Project(082102230035)supported by the Foundation of Science and Technology Department of Henan Province,China

摘　　要：The specific heat capacities of Cu60Zr20Hfl0Til0 bulk metallic glass （BMG） and crystallized alloys were measured from 2 to 101 K. The effect of crystallization on the specific heat capacity of the BMG was studied. The effects of crystallization and the relationship between local modes and boson peak in the BMG were discussed. The specific heat capacity deviates from the simple Debye behaviors, showing the presence of local harmonic modes （Einstein oscillator） in the BMG and the crystallized alloy. Model calculation includes the contribution of one Debye mode and two Einstein modes for the BMG, one Debye mode and one Einstein mode for the crystallized alloy, showing an adequate description of the experimental data.测量Cu60Zr20Hf10Ti10块体金属玻璃和其晶化态合金在2～101K的比热,研究晶化过程对块体金属玻璃比热的影响。讨论晶化过程对Cu60Zr20Hf10Ti10块体金属玻璃低温比热和块体金属玻璃的波色峰的影响。结果表明:这两种合金的比热都与单一的德拜模型不相符,都存在着局域谐振模型(爱因斯坦模型)。分别用一个德拜模型和两个爱因斯坦模型拟合玻璃态合金,用一个德拜模型和一个爱因斯坦模型拟合晶化态合金,拟合结果与实验数据吻合得很好。

关 键 词：Cu60Zr20HfloTi10 BMG specific heat capacity CRYSTALLIZATION 

分 类 号：TG139.8[一般工业技术—材料科学与工程]