RARE-EARTH MAGNET MATERIAL, METHOD OF MANUFACTURING RARE-EARTH MAGNET MATERIAL AND RARE-EARTH BONDED MAGNET BY THE METHOD

摘要

PROBLEM TO BE SOLVED: To lessen the temperature coefficient of the iHc of a rare-earth magnet material and to conductive to make the rare-earth magnet material superior in heat stability by a method wherein the magnet material is composed of a component composition, which is shown by a specified formula, has a monoclinic and/or hexagonal crystal structure and contains an R3 (Fe, M)29 Ny main phase of a specified mean crystal grain diameter. SOLUTION: The component composition of a rare-earth magnet material is shown by a formula of RαFe100-(α+β+γ)MβNr and the rare-earth magnet material has a monoclinic and/or hexagonal crystal structure and contains an R3 (Fe, M)29 Ny main phase of a mean crystal grain diameter of 0.05 to 1.0 μm. The R is one kind of the element or more than two kinds of the elements of some of rare-earth elements including Y and the M is one kind of the element or more than two kinds of the elements of some of Al, Ti, V, Cr, Mn, Cu, Ga, Zr, Nb, Mo, Hf, Ta and W. The (α), the (β) and the (γ) are respectively set in the ranges of 5<=α<=18, 1<= β<=50 and 4<=γ<=30 at atomic percentage.