SPS烧结双主相Nd_2Fe_(14)B-Ce_2Fe_(14)B稀土永磁材料微观结构的研究  

Study on Microstructure of Double Main Phase Rare Earth Permanent Magnet Nd_2Fe_(14)B-Ce_2Fe_(14)B Sintered by SPS

作　　者：马冬冬[1] 顾正飞[1] 徐成福 刘涛[1] 成林一 

机构地区：[1]桂林电子科技大学材料科学与工程学院,广西桂林541004 [2]桂林航天工业学院机械工程学院,广西桂林541004

出　　处：《稀有金属与硬质合金》2017年第5期42-45,49,共5页Rare Metals and Cemented Carbides

基　　金：中国国家重点基础研究项目(973项目;2014CB643703);国家自然科学基金资助项目(51261004);广西自然科学基金资助项目(2015GXNSFAA139249)

摘　　要：研究了放电等离子烧结(SPS)技术制备的双主相Nd_2Fe_(14)B-Ce_2Fe_(14)B稀土永磁材料的微观结构。结果表明,使用SPS等离子烧结炉能够在较低烧结温度和较少保压时间下制备高密度的烧结双主相Nd_2Fe_(14)B-Ce_2Fe_(14)B稀土永磁材料,其微观组织是由独立的Nd_2Fe_(14)B相和Ce_2Fe_(14)B相均匀分布构成;退火能够使烧结后还未晶化的非晶体晶化,且SPS等离子烧结能够使烧结双主相Nd_2Fe_(14)B-Ce_2Fe_(14)B稀土永磁材料发生很少的稀土元素扩散。随着退火温度的升高,Nd_2Fe_(14)B相和Ce_2Fe_(14)B相之间稀土元素的扩散距离增大。The microstructure of the double main phase rare earth permanent magnet Nd2 Fe14 B-Ce2 Fe14 B prepared by SPS was studied. The results show that the double main phase rare earth perrpanent magnet Nd2Fe14B-Ce2Fe14B with high density can be obtained in a spark plasma sintering furnace with lower sintering temperature and less holding time, and its microstructure is composed of uniformly distributed and independent Nd2 gel4 B phase and Ce2 Fe14 B phase. Annealing can promote the crystallization of the sintered magnet and spark plasma sintering can inhibit the diffusion of rare earth elements in the double main phase rare earth permanent magnet Nd2 Fe14 B-Ce2 Fe14 B. With the increase of annealing temperature, The diffusion distance increases of the rare earth elements between Nd2Fe14 B phase and Ce2 Fe14 B phase.

关 键 词：双主相稀土永磁材料 Nd2Fe14B-Ce2Fe14B 放电等离子烧结(SPS) 微观结构 退火 元素扩散 

分 类 号：TM273[一般工业技术—材料科学与工程]