利用放电等离子烧结技术(SPS)制备新型烧结磁体SPS NdFeB.为了更好理解磁体的磁性能,尤其是矫顽力和微组织关系的机理,本研究以热处理前后的SPS NdFeB为研究对象,利用扫描电镜(SEM)、高分辨透射电镜(HRTEM)、X射线能谱仪,B-H回线仪分别对磁体的显微组织和高分辨透射电镜像组织和磁性能进行了系统研究.结果表明,经过热处理后,磁体矫顽力明显提高,富稀土相的铁原子与稀土原子比Fe/Re明显下降;富稀土相结构形态发生明显变化,由热处理前的非晶态变为热处理后的晶态.
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