摘要
本文用真空电弧熔炼炉制备Gd0.99V0.01合金,在不同热处理条件下(900℃、1000℃、1100℃、1200℃,保温2h)进行真空退火处理后,对其绝热温变进行了研究。结果表明热处理温度对样品绝热温变有影响,经1200℃温度退火处理后的合金的最大绝热温变最高,可达2.69K;经退火处理后的合金居理温度比纯Gd略有增加,并随着退火温度的增加而减小;经1200℃温度退火处理后的Gd0.99V0.01合金的相对磁制冷能力RCT(T)比纯Gd高,有望成为一种较好的室温低场磁制冷工质。
Gd0.99V0.01alloy sample was prepared using arc melting in an argon atmosphere, the authors of this paper researched on adiabatic temperature changes of Gd0.99V0.01alloys that were prepared by heat treatment at 900℃,100℃,1100℃ ,1200℃ for 2h.. The results show the heat treatment effects on the adiabatic temperature change of the sample ,and the adiabatic temperature change of the sample is better than others at 1200℃ for 2h about 2.69K when field changes 0-- 1.4Tesla. Curie temperatures of these annealed alloys are more increase than that of Gd, and deerease with the increasing of the annealing temperature. The relative cooling power RCT（T） of the alloys treated at 1200℃ for 2h are higher than that of Gd one field 0 - 1.4Tesla. so they are potential magnetic refrigerants working in a refrigerator at room temperature.
出处
《四川有色金属》
2007年第4期26-28,共3页
Sichuan Nonferrous Metals
关键词
磁制冷材料
绝热温变
magnetic refrigeration marerial
adiabatic temperature changes
