| 摘要 |
PURPOSE:To enable high-energy products to be obtained in bulk materials of R2Fe14C-based alloy by a method wherein the title magnet is expressed by a composition formula: (R'100-xRa)xFe100-x-y-zMyCz where R is a kind or more of rare earth elements, R' a kind or more of heavy rare earth elements, M a specific element, and X-Z and a are values within respectively specified ranges. CONSTITUTION:This magnet is expressed by a composition formula: (R'100-xRz)xFe100-x-y-zMyCz, where R is one or two kinds or more light rare earth elements, R' one or two kinds or more heavy rare earth elements M at least a kind out of Al, Si, P, Cr, V, Ti, Mn, Ga, Ge, In, Sn, Ni, and N with x 10-15%, y 1-12%, z 4-10%, and a 50% or more by atomic percentage. Molten alloy of the above-mentioned composition is formed into a thin strip by superquenching, and a rare earth permanent magnet is prepared by heat treatment of this thin strip. Heat treatment is preferably conducted at 700-900 deg.C. For example, the above-mentioned alloy composition is Gd4.7, Nd7.1, Fe76.4, Al5.9, C5.9. |
