Mg_(80-x)Cu_(10+x)Y_(10)非晶态合金的DSC研究  

DSC investigation of amorphous alloys Mg_(80-x)Cu_(10+x)Y_(10)

作　　者：王晓军[1] 陈学定[1] 夏天东[1] 杨春秀[1] 王晓丽[1] 

机构地区：[1]兰州理工大学材料科学与工程学院

出　　处：《兰州理工大学学报》2005年第1期1-3,共3页Journal of Lanzhou University of Technology

基　　金：甘肃省自然科学基金(ZS032 B25 018)

摘　　要：利用单辊甩带法制备了Mg80-xCu10+xY10(x=0,5,10,15)非晶态合金薄带,用XRD分析和DSC分析显示薄带形成了非晶态结构.根据DSC曲线,确定了表示非晶形成能力的 Tg、Tx、Tl、Trg和ΔTx 等温度参数,同时提出了以晶化放热值和熔化吸热值的比值作为表示非晶形成能力的新参数约化玻璃转变焓.定量 DSC分析结果显示,新旧参数在表示该非晶薄带的非晶形成能力时,结果基本一致.Amorphous ribbons of Mg_(80-x)Cu_(10+x)Y_(10)(x=0,5,10,15) are prepared by melt spinning process and the amorphous structure is testified by X-ray diffraction analysis and differential scanning calorimeter analysis. The values of T_g,T_x,T_l,T_(rg) and ΔT_x, which are the parameters to describe the glass forming ability for bulk metallic glasses and are expressed only by temperature, are determined by DSC curves for four bulk glasses and the ratio of the crystallization heat to melting heat is proposed as a new parameter-reduced glass transition enthalpy. DSC quantitative analysis shows that both the new parameter and old parameters give a basically consistent result when they are used to describe the glass forming ability of amorphous ribbons of Mg_(80-x)Cu_(10+x)Y_(10).

关 键 词：非晶态合金 约化玻璃温度 DSC 非晶薄带 

分 类 号：TG139.8[一般工业技术—材料科学与工程]