Method of manufacturing permanent magnet alloys
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 18, 1983
Grant Date -
N/A
app pub date -
Dec 18, 1980
filing date -
Apr 18, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention relates to a process for manufacturing R.sub.2 Co.sub.17 system permanent magnet alloys of rare earth(R)-cobalt(Co) intermetallic compounds. Sm.sub.2 Co.sub.17 alloy, in which R is samarium (Sm) with respect to intermetallic compounds whose stoichiometric composition is R.sub.2 Co.sub.17, possesses high saturation magnetization and high Curie temperature making it possible to obtain a high energy product. However, its permanent magnetization has not been practiced much at all because coercive force could not be obtained. This invention practices heat aging for 0.5-200 hours at 700.degree.-800.degree. C. in the heat treatment process of the sintered material of R.sub.2 (Co,Fe,M).sub.17 system (M is one or more than one elements of Ti, Cr, Mn, Ni, Cu, Zr, Nb, Hf, Ta, and W) and the coercive force is increased by carrying out this process in a magnetic field to achieve permanent magnetization.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully