Phase formation in hypostoichiometric Sm₂Fe₁₇ alloys modified with Ti and C

Authors

Jeffrey E. Shield, University of Nebraska - LincolnFollow
B.E. Meacham, University of Utah, Salt Lake City, Utah

Date of this Version

2-15-2000

Comments

Published in JOURNAL OF APPLIED PHYSICS VOLUME 87, NUMBER 4. Copyright © 2000 American Institute of Physics. Used by permission.

Abstract

The phase formation, crystallization products, microstructure, and magnetic behavior of Fe-rich Sm–Fe alloys modified with Ti and C have been determined. Alloys of nominal composition (Sm _0.11-xFe _0.89+x) ₉₄Ti ₃C ₃ with x=0, 0.02, and 0.04 were produced by melt spinning. Crystalline phases observed included SmFe ₇ and α -Fe and an increasing amorphous fraction was observed with increasing x. Upon crystallization the amorphous fraction converted to Sm₂Fe₁₇ and a-Fe, with a grain size of 30 nm for the sample with x=0.02. The magnetic measurements of nitrided alloys revealed a remanent ratio above 0.5 for x=0 and 0.02, although the coercivity was rather low.