Abstract
Microstructure and magnetic properties of boron-rich Nd x Fe 85− x Ti 4B 10.5C 0.5 ( x=7.8, 8.2, 8.6, 9.0, and 9.4) alloys with Ti and C additions have been investigated. The results show that with the increasing of Nd content, B r of the alloy ribbons decreases monotonically, but i H c and (BH) max first increase and then decrease. In comparison with Nd y Fe 89− y B 11 ( y=7.8, 8.2, 8.6, 9.0, and 9.4) alloy ribbons without Ti and C additions, enhanced magnetic properties of (BH) max larger than 128 kJ/m 3 and i H c larger than 620 kA/m are achieved even when the Nd content is reduced to 7.8 at%. TEM investigation reveals that the enhanced coercivity and maximal energy product are attributed to the fine and uniform grains induced by Ti and C additions.
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