Preparation of anisotropic Nd(Fe,Mo){sub 12}N{sub 1.0} magnetic materials by strip casting technique and direct nitrogenation for the strips

Journal Article · Fri Apr 01 04:00:00 EDT 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3567017· OSTI ID:21538253

Jingzhi, Han; Shunquan, Liu; Meiying, Xing; Zhong, Lin; Xiangpeng, Kong; Changsheng, Wang; Honglin, Du; Yingchang, Yang ^[1]; Jinbo, Yang ^[1]

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1. School of Physics, Peking University, Beijing 100871 (China)

The Nd(Fe,Mo){sub 12}-type alloys are prepared by strip casting technique, and direct nitrogenation of the strips without precrushing is executed in this paper. It is found that 6 h annealing treatment at 1050 deg. C for the strips is enough to obtain the single-phase Nd(Fe,Mo){sub 12} compounds. The strips can be directly nitrogenated at 620 deg. C to obtain interstitial Nd(Fe,Mo){sub 12}N{sub 1.0} materials, and a spontaneous pulverization phenomenon in the strips induced by nitrogenation is found. The results indicate that the nitrogenation process of the strips can be used to prepare Nd(Fe,Mo){sub 12}N{sub 1.0} interstitial nitrides and pulverize the casted strips into fine particles simultaneously. Base on this, we propose a new technical route of preparing Nd(Fe,Mo){sub 12}N{sub X} magnetic powders without precrushing and obtain anisotropic NdFe{sub 10.5}Mo{sub 1.5}N{sub 1.0} powders with a remanence of B{sub r} = 1.08 T, a coercivity of {sub i}H{sub c} = 400 kA/m, and a maximum energy product of (BH){sub max} = 144 kJ/m{sup 3}.

• OSTI ID: 21538253
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 7 Vol. 109; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALLOYS
ANISOTROPY
ANNEALING
COERCIVE FORCE
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
HEAT TREATMENTS
INTERSTITIALS
IRON ALLOYS
MAGNETIC MATERIALS
MATERIALS
METALLURGY
MOLYBDENUM ALLOYS
NEODYMIUM ALLOYS
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
POINT DEFECTS
POWDER METALLURGY
RARE EARTH ALLOYS
TRANSITION ELEMENT ALLOYS