Patent ID: 7344605
Filing Date: 2008-03-18
Classification: B82Y,C21D,C22C,H01F

Abstract:
1. A method of producing an anisotropic exchange spring magnet powder comprising: preparing a crystalline mother material containing a hard magnetic material phase containing a rare earth metal element, a transition metal element, and at least one element selected from the group consisting of boron (B), carbon (C), nitrogen (N) and oxygen (O), and a soft magnetic material phase containing a transition metal element, and at least one element selected from the group consisting of boron (B), carbon (C), nitrogen (N) and oxygen (O), wherein the crystalline mother material partially having a content of amorphous parts of below about 95%; amorphising said crystalline mother material by a ball milling method, and crystallizing said crystalline mother material amorphisated in the amorphising process by heat treating.