Wenderoth, Lind & Ponack
Method of making anisotropic permanent magnets of Mn-Al-C alloys
 Anisotropic permanent magnets of Mn-Al-C polycrystalline alloy are produced by warm extrusion at a temperature of 530.degree. to 830.degree. C utilizing converging or tapered dies with lubricant interposed between the polycrystalline body and the converging die. With dies of rather small semiangles, alloys with improved magnetic properties with regard to (BH)max, and especially Br are obtained. 
Matsushita Electric Industrial Co., Ltd.
C H C Y Y
C22C H01F C22F Y10T Y10S
inventional inventional inventional additional additional
Nobuyuki Yoichi Tadao
Kato Sakamoto Ohtani