| 摘要 |
PURPOSE: To obtain an excellent permanent-magnet material having a large maximum energy product by a method wherein crystal particles having a structure in which FeNx is surrounded by a phase containing rare-earth elements of a specific composition are used as a principal phase. CONSTITUTION: Crystal particles having a structure in which FeNx (where 0.02<=x<=0.2) of a diameter of about 5 to about 100nm is surrounded by a phase containing rare-earth elements, of a specific composition, in a thickness of about 1 to about 20nm are used as a principal phase. The phase containing the rare-earth elements of the specific composition is indicated by RaTMbMcADdNe (where R represents one or more kinds out of rare-earth elements including Y, TM represents at least one kind out of Fe, Ci and Ni, M represents one kind out of Si, Ti, V, Cr, Mo and W, AD represents one kind out of Al, Zn, Cu and the like, 5<=a<=18 atomic %, 65<=b<=85 atomic %, 0<=c<=20 atomic %, 0<=d<=8 atomic % and 0<=e<=15 atomic %), and it is one out of a ThMn12 -type crystal structure, a Th2 Zn17 -type crystal structure or a Th2 Ni17 -type crystal structure or a composite phase of them. Thereby, it is possible to obtain an excellent material having a large maximum energy product. |
