Method of making a solid magnetic material from Sm.sub.2 Fe.sub.

Details Method of making a solid magnetic material from Sm.sub.2 Fe.sub. Method of making a solid magnetic material from Sm.sub.2 Fe.sub.

1995-03-01

1996-11-12

Sheehan, John

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148103, H01F 1057

Patent

active

055736033

ABSTRACT:
A method of making a solid magnetic material from Sm.sub.2 Fe.sub.17 N.sub.3-x type intermetallic nitride powder, where 0.ltoreq.x.ltoreq.1, comprises the following steps:
a--the powder is mixed intimately with glass powder having a conversion temperature Tg between 260.degree. C. and 310.degree. C. and a softening temperature Tf less than 400.degree. C., the proportion of glass powder being between 10% and 30% of the total volume;
b--the mixture is compressed to obtain a solid;
c--the solid obtained is subjected in a neutral gas atmosphere to a heat cycle during which a temperature not less than Tf+5.degree. C. and not more than 420.degree. C. is maintained for at least one hour.

REFERENCES:
patent: 5137587 (1992-04-01), Schultz et al.
patent: 5395459 (1995-03-01), Pinkerton et al.
Patent Abstracts of Japan, vol. 15, No. 135 (E-1052) 4 Apr. 1991, & JP-A-03 016 102 (Asahi Chem Ind Co Ltd) 24 Jan. 1991.
Patent Abstracts of Japan, vol. 17, No. 230 (E-1361) 11 May 1993 & JP-A-04 360 501 (Daido Steel Co Ltd) 14 Dec. 1992.
Patent Abstracts of Japan, vol. 17, No. 538 (E-14440) 28 Sep. 1993 & JP-A-05 152 116 (F. Teruhiko) 18 Jun. 1993.
French Search Report FR 9402389.

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