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The alloy with nominal composition Sm_2(Fe0.94Ti0.06)17 is prepared by arc-melting, hydrogenation and nitrogenation processes. The Sm_2(Fe0.94Ti0.06)17 alloy has a single phase of Sm_3(Fe, Ti)29 with the Nd_3(Fe, Ti)29-type structure. The corresponding hydride phase with the same phase structure of the parent alloy was formed after a hydrogen decrepitation (HD) process at 300℃. The hydrogenation at 800℃ mainly shows a HDDR process. The HD and nitrogenation at 500℃ result in increasing the Curie temperature of the alloy by 72℃ and by 158℃ due to lattice expansions, respectively. The anisotropic and isotropic Sm_3(Fe. Ti)29N_y magnets are obtained after HD, HDDR and the consequent nitrogenation, respectively. The optimum magnetic properties of Sm_3(Fe, Ti)29N_y powders achieved in the above two processes are: (i) B_r=0;82 T, _iH_c=4.48 kA/cm. (BH)_max=54.3 kJ/m~3, (ii) B_r=0.68 T, _iH_c=8.14 kA/cm, (BH)max=66.4 kJ/m~3.
The alloy with nominal composition Sm_2 (Fe0.94Ti0.06) 17 is prepared by arc-melting, hydrogenation and nitrogenation processes. The Sm_2 (Fe0.94Ti0.06) 17 alloy has a single phase of Sm_3 (Fe, Ti) 29 with the Nd_3 (Fe, Ti) 29-type structure. The corresponding hydride phase with the same phase structure of the parent alloy was formed after a hydrogen decrepitation (HD) process at 300 ° C. The hydrogenation at 800 ° C mainly shows a HDDR process. The HD and nitrogenation at 500 ℃ result in increasing the Curie temperature of the alloy by 72 ℃ and by 158 ℃ due to lattice expansions, respectively. The anisotropic and isotropic Sm_3 (Fe. Ti) 29N_y magnets are obtained after HD, HDDR and the consequent nitrogenation, respectively. The optimum magnetic properties of Sm_3 (Fe, Ti) 29N_y powders are in the above two processes are: (i) B_r = 0; 82T, _iH_c = 4.48 kA / cm. / m ~ 3, (ii) B_r = 0.68 T, _iH_c = 8.14 kA / cm, and (BH) max = 66.4 kJ / m ~ 3.