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作为磁致冷技术的关键部分,性能优良的磁致冷材料是整个系统的核心部分。La(Fe1-xSix)13及NiMn基赫斯勒合金被磁制冷材料专家认为是最具有实际应用价值的两种磁制冷工质。特别是La(Fe1-xSix)13合金,普通制备方法为电弧熔炼后在1150度高温退火半月以上才能成相。对于用熔体快淬的方法获得的条带样品,却只需短到数十小时的时间。然而影响其微观组织结构、成分,进而磁性的内在机制却不清楚。对于NiMn基赫斯勒合金虽然制备方法简便,电弧熔炼后在800度以上的温度
As a key part of magnetic refrigeration technology, high performance magnetic refrigeration material is the core of the whole system. La (Fe1-xSix) 13 and NiMn-based Hessler alloys are considered as the two most practical magnetic refrigeration fluids by magnetic refrigeration experts. In particular La (Fe1-xSix) 13 alloy, the general preparation method for the arc melting 1150 degrees annealing at high temperature for more than a month to become phase. Strip samples obtained by the melt-quench method are as short as tens of hours. However, the internal mechanisms that affect the microstructure, composition, and thus magnetism are not clear. For NiMn-based Heusler alloy although the preparation method is simple, arc melting at a temperature above 800 degrees