Structure and Magnetic Properties of Sm_2Fe_(17)N_x Sintering Magnets Prepared by Spark Plasma Sintering  

作　　者：张东涛 岳明 张久兴 

机构地区：[1]Key Laboratory of Advanced Functional Materials,Ministry of Education,Beijing University of Technology

出　　处：《Journal of Rare Earths》2006年第z2期325-328,共4页稀土学报（英文版）

摘　　要：Bulk Sm2Fe17Nx sintering magnet was fabricated by spark plasma sintering(SPS) technique. The effects of sintering pressure and sintering temperature on the magnetic properties of the Sm2Fe17Nx magnet were investigated. As a result, the density of the magnet is obviously improved with the increase of sintering pressure, but the coercivity drops since Sm2Fe17Nx has decomposed into SmN,α-Fe and N2. When sintering temperature was only above 200℃under 1 GPa sintering pressure, the coercivity even begins to decrease, which indicates that high pressure promotes the decomposition of the Sm2Fe17Nx at lower temperature. The decomposition is also proved by the decrease of nitrogen and increase ofα-Fe in the magnets.Bulk Sm2Fe17Nx sintering magnet was fabricated by spark plasma sintering(SPS) technique. The effects of sintering pressure and sintering temperature on the magnetic properties of the Sm2Fe17Nx magnet were investigated. As a result, the density of the magnet is obviously improved with the increase of sintering pressure, but the coercivity drops since Sm2Fe17Nx has decomposed into SmN,α-Fe and N2. When sintering temperature was only above 200℃under 1 GPa sintering pressure, the coercivity even begins to decrease, which indicates that high pressure promotes the decomposition of the Sm2Fe17Nx at lower temperature. The decomposition is also proved by the decrease of nitrogen and increase ofα-Fe in the magnets.

关 键 词：SM2FE17NX spark plasma sintering decomposition MAGNET rare earths 

分 类 号：TM273[一般工业技术—材料科学与工程]