Patent ID: 7144463
Filing Date: 2006-12-05
Classification: B22F,C22C,H01F

Abstract:
1. A method of making a magnetic material comprising: forming a melt comprising the composition, in atomic percentage, of  rapidly solidifying the melt to obtain a magnetic powder; thermally annealing the magnetic powder at a temperature range of about 350° C. to about 800° C. for about 0.5 minutes to about 120 minutes; wherein R is Nd, Pr, Didymium (a nature mixture of Nd and Pr at composition of Nd 0.75 Pr 0.25 ), or a combination thereof; R′ is La, Ce, Y, or a combination thereof; M is one or more of Zr, Nb, Ti, Cr, V, Mo, W, and Hf; and T is one or more of Al, Mn, Cu, and Si, wherein 0.01≦a≦0.8, 7≦u≦13, 0≦v≦20, 0.01≦w≦1, 0.1≦x≦5, and 4≦y≦12, and wherein the magnetic material exhibits a remanence (B