Structure and Magnetic Properties of Sm(CobalFexTi0:05)9.66 Alloys (x = 0-0.57) and Sm(Co0.66Fe0.19Ti0.05Cu0.1)9.66 Magnets
CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF MATERIALS SCIENCE AND ENGINEERING
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Potential permanent magnetic materials with compositions of SmCobalFexTi0.059.66 x 0-0.57 have been synthesized and characterized in the temperature range of 10-1473 K and at fields up to 5 T. The experimental results show that near single phase materials with Th2Ni17 structure were formed in SmCobalFexTi0.059.66 alloys after splat quenching from 1473 K. The Ti atoms play an important role in stabilizing the Th2Ni17 structure for the 3d transition metal rich nonstoichiometric 2-17 compounds. Encouraging hard magnetic properties were observed in alloys. Both sintered and melt-spun powder magnets were fabricated. A strong domain wall pinning behavior was observed. The effect of different heat treatment conditions on the phase formation alloys was also discussed.
- Electricity and Magnetism