金属非晶态-过冷液态转变的比热容研究  

Investigation on the specific heat capacity of metallic glasses by using DSC method

作　　者：郑毅[1] 任玉平[2] 

机构地区：[1]中航工业沈阳飞机工业(集团)有限公司,沈阳110850 [2]东北大学材料各向异性与织构教育部重点实验室,沈阳110819

出　　处：《材料与冶金学报》2012年第4期297-299,共3页Journal of Materials and Metallurgy

基　　金：中国博士后基金(No.20060390304);长江学者和创新团队发展计划(No.IRT0713);高等学校学科创新引智计划(B07015)

摘　　要：利用DSC热分析法研究了Zr基及78Fe-9Si-13B非晶合金的比热容随温度的变化规律,发现Zr基非晶的比热容温度曲线与二级相变热容变化的规律十分相似,因此从热力学上证明了玻璃态与过冷液态之间的转变属于二级相变.78Fe-9Si-13B非晶合金的比热容温度曲线上仅存在一个λ形峰值,这显示居里温度与玻璃转变温度几乎相等,结构有序性与磁矩有序性的变化发生了重叠.The heat capacity-temperature curves of the amorphous state of Zr-based and 78Fe-9Si-13B alloys have been investigated by using differential scanning calorimeter(DSC).It is found that the heat capacity-temperature curve of Zr-based metallic glass is very similar to that of the crystalline materials with second-order transition.As a result,this can be an evidence that the transformation from the glassy state to supercooled liquid belongs to second-order transition.There is only one maximum with λ-type in the heat capacity-temperature curve of 78Fe-9Si-13B amorphous alloys.It is probably shown that the glass transition temperature is almost equal to the curie temperature,and both structural and magnetic moment ordering simultaneously occur.

关 键 词：金属玻璃态 过冷液态 二级相变 比热容 

分 类 号：TG139.8[一般工业技术—材料科学与工程]