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通过X射线衍射、差热分析及磁测量等手段对电弧炉熔炼的Nd2Fe14.5Cr2.5化合物的结构和相变进行了研究,研究结果表明,950℃下退火的样品具有Th2Zn17型结构,其居里温度为375 K.1100℃下退火的样品具有Nd3(Fe.Ti)29型结构,其居里温度为445 K.Nd2Fe14 5Cr2.5化合物在1100℃左右发生结构相变,山菱方相的Th2Zn17型结构转变成单斜相的Nd3(Fe,Ti)29型结构.具有Th2Zn17型相结构的Nd2Fe14.5Cr2.5化合物在约300℃左右可以发生有效的吸氮反应.

参考文献

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