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High coercivity Sm2Fe17N3 submicron size powder prepared by polymerized-complex and reduction–diffusion process

Scripta Materialia Volume 120, 15 July 2016, Pages 27–30

2016年4月21日(木)

doi:10.1016/j.scriptamat.2016.03.028
( Y. Hirayama, A.K. Panda1, T. Ohkubo, K. Hono )

Abstract

High coercivity Sm2Fe17N3 submicron size powder was synthesized by the polymerized-complex (PC), hydrogen reduction (HR) and reduction–diffusion (RD) processes. A mixture of nano size SmOx, FeOx and SmFeO3 particles was first synthesized by the polymerized-complex method, which was then reduced to α-Fe and SmOx by hydrogen. Subsequent reduction diffusion using Ca metal led to the formation of submicron size Sm2Fe17 powder with a mixture of CaO. After nitriding and rinsing, Sm2Fe17N3 powder with the average diameter of 0.69 ± 0.17 μm was obtained, which exhibited the coercivity of 2.32 T, the highest ever reported for ternary Sm2Fe17N3 anisotropic powder.



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