Gd_3Al_(2-x)Ga_x系合金绝热温变的直接测量  

Direct measurement of the adiabatic temperature change in Gd_3Al_(2-x)Ga_x

作　　者：生利英[1] 黄焦宏[2] 曹朝霞[1] 齐勇田[1] 宋博宇[1] 

机构地区：[1]包头职业技术学院材料工程系,内蒙古包头014030 [2]包头稀土研究院,内蒙古包头014010

出　　处：《金属功能材料》2015年第2期37-40,共4页Metallic Functional Materials

基　　金：内蒙古自治区高等学校科学研究项目资助(NJZC13359)

摘　　要：用真空高频磁悬浮炉制备了Gd3Al2-xGax(x=0,0.1,0.2,0.3)4种合金。熔炼后合金不进行热处理。利用XRD和SEM测量了合金的结构、组织;利用磁热效应直接测量仪测量了合金在1.5T磁场下的绝热温变。结果表明,少量Ga替代Al,合金的结构没有发生变化,最大绝热温变提高;居里温度变化不大。Gd3Al2-xGax（x =0,0.1,0.2,0.3）alloys were prepared in a high-frequency floating furnace without heat treatment.The Structure and microstructure of alloys was measured by XRD and SEM;the adiabatic temperature was measured by direct measurement of magnetocaloric effect instrument under magnetic field change of 1.5T.The results show that the structure of alloys has not changed;the maximum adiabatic temperature change increases;the Curie temperature changes a little when a small amount of Ga substitutes for Al.

关 键 词：Gd3Al2-xGax 直接测量 绝热温变 

分 类 号：TG115.2[金属学及工艺—物理冶金]