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OALib Journal期刊
ISSN: 2333-9721
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熔体快淬la1-xcex(fe0.92co0.08)11.4si1.6合金的结构和大磁熵变
Keywords: 金属材料,磁致冷材料,熔体快淬,la1-xcex(fe0.92co0.08)11.4si1.6合金,磁熵变
Abstract:
？用熔体快淬法制备la1-xcex(fe0.92co0.08)11.4si1.6(x=0,0.1,0.3,0.5)合金,通过x射线衍射和磁性能测量研究了退火态(1000℃、3h)la1-xcex(fe0.92co0.08)11.4si1.6的相组成和磁熵变。结果表明,以ce部分替代la使la1-xcex(fe0.92co0.08)11.4si1.6合金更易形成nazn13型立方结构相、α--fe相的含量显著减少,居里温度有一定程度地降低,磁熵变有较大幅度的增加。但是,当ce替代量增加到0.5时出现杂相,磁熵变反而降低。la1-xcex(fe0.92co0.08)11.4si1.6(x=0.3)合金在室温附近的最大等温磁熵变比纯gd的还大,有望成为低成本、高性能的室温磁致冷材料。
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