Self-organized nanorods in disproportionated Sm2Fe17 and NdFe10.5Mo1.5 alloys

Self-organized rod-like disproportionation microstructures were obtained in Sm2Fe17 alloy by modifying the hydrogenation disproportionation desorption recombination (HDDR) process. The SmH2 nanorods are uniformly embedded in a Fe matrix. All the SmH2 are oriented along the same direction, and show a certain orientation relationship with the Fe matrix. Similar morphology was also observed in the disproportionated products of the NdFe10.5Mo1.5 alloy. However, for both Sm2Fe17 and NdFe10.5Mo1.5 alloys, no crystallographic orientation relationship is found between the recombined grains and the corresponding disproportionated products, and there is no crystal texture in the HDDR treated magnetic powders. (C) 2012 Elsevier B.V. All rights reserved.