HARD MAGNETIC COMPOSITION, PERMANENT MAGNET POWDER, METHOD FOR PERMANENT MAGNET POWDER, AND BONDED MAGNET

摘要

A hard magnetic composition which is represented by a general formula: R(Fe100-y-wCowTiy)xSizAv, wherein R is at least one element selected from rare earth metals including Y, and Nd accounts for 50 mole % or more of R, and A is N and/or C, and wherein with respect to the mole ratios in the general formula, x is 10 to 12.5, y is (8.3 - 1.7 X z) to 12.3, z is 0.1 to 2.3, v is 0.1 to 3, and w is 0 to 30, and wherein (Fe + Co + Ti + Si)/R > 12 is satisfied. The hard magnetic composition comprises a single phase structure of a phase having a ThMn12 type crystal structure.