Abstract
High-purity ternary Pr13Fe80B7 magnetic powder with high anisotropy is obtained by a modified hydrogenation disproportionation desorption recombination (HDDR) process in this work. This powder exhibits a record-high Br of 1.05T, and has a good crystal texture along the c axis. It is found that the formation of HDDR Pr13Fe80B7 anisotropy is related to a rodlike disproportionation microstructure. We also show that by changing the HDDR conditions, an intrinsic coercivity of 800kA∕m and an energy product of 144kJ∕m3 are obtained on this powder. The details of the modified HDDR process are also presented in this paper.
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