Nitrogenation Process of Nd(Fe, Mo)_(12) Compound  

作　　者：Qi Zeng Yiaofu Xiao Yunshen Deng Xubo Liu Shenzhi Dong Materials Science and Engineering School, UST Beijing, Beijing 100083, China 

出　　处：《International Journal of Minerals,Metallurgy and Materials》1998年第2期97-99,共3页矿物冶金与材料学报（英文版）

摘　　要：The reaction kinetics between nitrogen gas and Nd(Fe, Mo)_(12) intermetallic compound has been studied. The relationship between the reaction temperature, the reaction time with average mass fraction of N in samples have been measured. The activation energy of first step reaction, E_f,(18.2 kJ/mol), is smaller than E_s (64.6 kJ /mol) of the second step during which nitrogen diffusion in the range 400～550℃ can be represented by an activated interstitial diffusion process. Heating above 550℃ leads to disproportion of the compound into NdN and α-Fe and the permanent properties will be damaged greatly.The reaction kinetics between nitrogen gas and Nd(Fe, Mo)_(12) intermetallic compound has been studied. The relationship between the reaction temperature, the reaction time with average mass fraction of N in samples have been measured. The activation energy of first step reaction, E_f,(18.2 kJ/mol), is smaller than E_s (64.6 kJ /mol) of the second step during which nitrogen diffusion in the range 400～550℃ can be represented by an activated interstitial diffusion process. Heating above 550℃ leads to disproportion of the compound into NdN and α-Fe and the permanent properties will be damaged greatly.

关 键 词：Nd(Fe Mo)_(12) NITROGENATION activation energy 

分 类 号：TG156.82[金属学及工艺—热处理]