0632471-A2 is referenced by 16 patents and cites 4 patents.

A permanent magnet is obtained by pulverizing, molding and sintering a starting material containing an alloy ingot. The alloy ingot contains not less than 90% by volume of prismatic crystals each having a prismatic crystal grain size of 0.1 to 50 mu m along a short axis thereof and a prismatic crystal grain size of larger than 100 mu m and not larger than 300 mu m along a long axis thereof, and is obtained by uniformly solidifying by a single roll method a molten alloy containing 25 to 31% by weight of a rare earth metal, 0.5 to 1.5% by weight of boron and iron under cooling conditions of a cooling rate of higher than 500 DEG C/sec. and not higher than 10,000 DEG C/sec. and a supercooling degree of 50 to 500 DEG C.

Permanent magnet containing rare earth metal, boron and iron.
Application Number
EP19940108868 19940609
Publication Number
0632471 (A2)
Application Date
June 9, 1994
Publication Date
January 4, 1995
Okada Chikara
Miyake Yuichi
Yamamoto Kazuhiko
Santoku Metal
H01F 01/053
H01F 01/032
C22C 01/04
H01F 01/057
C22C 01/04
View Original Source Download PDF