Title :
A detailed study of the nitrogenation of the Fe17R2 phases (R=Sm, Gd, Ho and Tb)
Author :
Gama, S. ; Ribeiro, C.A. ; Colucci, C.C. ; Sanjujo, N.L. ; Campos, C.
Author_Institution :
Inst. de Fisica, Univ. Estadual de Campinas, Sao Paulo, Brazil
fDate :
11/1/1995 12:00:00 AM
Abstract :
Early studies in the 17:2 phases based on Pr, Nd and Sm for relatively low absorption temperature (400°C) showed that the diffusion pattern is different from the shell-core model. Instead, the diffusion occurs at phase and grain boundaries. The precipitation of the saturated phase occurs along these boundaries. In this work we show, using different characterization methods, that the same behavior is observed for the 17:2 phases based on Sm, Gd, Ho, Tb
Keywords :
ferromagnetic materials; gadolinium alloys; grain boundary diffusion; holmium alloys; iron alloys; nitrogen; permanent magnets; phase diagrams; precipitation; samarium alloys; solid-state phase transformations; terbium alloys; 400 C; Fe17Gd2N; Fe17Gd2Nx; Fe17Ho2N; Fe17Ho2Nx; Fe17Sm2N; Fe17Sm2Nx; Fe17Tb2N; Fe17Tb2Nx; diffusion pattern; grain boundaries; phase boundaries; saturated phase precipitation; shell-core model; Absorption; Diffraction; Electrons; Iron; Lattices; Neodymium; Nitrogen; Samarium; Solids; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
