La0.9Ce0.1Fe11.7-xMnxSi1.3Hy(x=0.21,0.25)粘结复合物的磁热效应

Dao-qin LI,Lin SONG,Zhi-qiang OU,Ming MING,Ying WANG,Jiao-hong HUANG

Metallic Functional Materials（2016）

Cited 3|Views17

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Abstract

通过高频悬浮炉反复熔炼,在1 363 K纯氩环境下退火144 h后淬火,饱和吸氢后得到母合金样品La0.9Ce0.1Fe117-xMnxSi1.Hy(x=0.21,0.25).对其进行等质量塑性粘结,得到复合物.XRD相图结果表明,母合金的主相均为NaZn13型立方结构(空间点群为Fm-3c).由热磁曲线和磁熵变曲线可以明显看出,复合物的温变区间与两母合金相比有所增大,并且其熵变值在1.5T磁场下依然比Gd的要高很多,最高约为6.4 J/(kg· K).复合物的相对制冷能力RCP(S)值与两母合金相比略大.

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