PRODUCTION OF RARE EARTH BONDED MAGNET

摘要

PURPOSE:To provide rare earth bonded magnet which ensures excellent magnetic characteristics and temperature characteristics without using hydrogen. CONSTITUTION:Rare earth metal (R) composed of Nd or Pr or Ce and alloy whose major ingredients are Fe and other metal containing ThMn12 type compound as a major phase are powdered to manufacture alloy powder whose average grain diameter is 200mum. The alloy powder is brought into contact with nitride gas at 200-500 deg.C so as to permit nitrogen to invade, binder is mixed with the nitrogen invaded powder and magnet is manufactured.