Nd-Fe-B系異方性HDDR処理粉の高保磁力化 Improvement of Intrinsic Coercivity in HDDR-processed Anisotropic Permanent Magnets
High-coercivity anisotropic magnet powder of H<SUB>cJ</SUB>=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.
粉体および粉末冶金 44(9), 818-821, 1997-09-15
Japan Society of Powder and Powder Metallurgy