应用放电等离子烧结技术(SPS)制备新型SPS NdFeB磁体.利用扫描电子显微镜(SEM)观察磁体的显微组织,利用B-H回线仪测量磁体磁性能,利用阿基米德法测量样品密度.系统研究了稀土含量不同的两种NdFeB磁体的烧结特征.结果表明,SPS NdFeB磁体的烧结特征与传统烧结方式的特征不同,且与样品稀土含量密切相关;较高稀土含量样品,最佳烧结温度较低,且范围较宽(780-940℃);较低稀土含量的样品,最佳烧结温度较高,范围较窄(最佳值950℃附近);以此为基础,对烧结后期阶段的烧结作用机制进行了相关讨论.
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