Abstract
High-coercivity anisotropic magnet powder of HcJ=1.24MA/m has been developed in HDDR process by substituting Dy for Nd to decrease the value of irreversible thermal flux losses. The newly developed powder provides lower irreversible thermal losses than MQP-B up to 100°C when molded into resin-bonded magnets. The magnets made from the high-HcJ powder give higher relative open flux when magnetized under a magnetization field of 1.2MA/m at 80°C than magnetized at 20°C. To magnetize these magnets at high temperature also decreases the value of irreversible thermal flux losses.
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