摘要
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。
New kind of NdFeB-based permanent magnets named as SPS NdFeB magnets were prepared by using spark plasma sintering technique（SPS）.To well comprehend the sintering characteristics of SPS NdFeB magnets with two kinds of compositions,the microstructures,magnetic properties and densities of SPS NdFeB magnets sintered at different temperature were systematically investigated by means of scanning electronic microscope（SEM）,B-H loop–line instrument as well as Archimedes method,respectively.The results showed that the sintering characteristics of SPS NdFeB magnets were different from that of conventional ones,varying with the composition of samples.In detail,samples with higher rare earth compositions possess a wider range of 780-940℃ appropriate sintering temperature,in which the sintering temperature is lower,while the samples with lower rare earth compositions possess a optimal sintering temperature of 950℃.Based on results above,the mechanism of action during the late stage of sintering process was discussed.
出处
《功能材料与器件学报》
CAS
CSCD
北大核心
2011年第3期327-332,共6页
Journal of Functional Materials and Devices
基金
江西师范大学博士启动基金(No.1886)
江西省教育厅2008年重点科技项目(No.2284)
关键词
放电等离子烧结
烧结钕铁硼
烧结温度
烧结特征
SPS
sintered NdFeB magnet
sintering temperature
Sintering Characteristic
