Title:
【発明の名称】改良磁性材料及びその製造方法
Document Type and Number:
Japanese Patent JPH06509211
Kind Code:
A
Abstract:
This invention relates to a process for producing a rare earth-containing material capable of being formed into a permanent magnet having an increased Curie temperature comprising treating the alloy with a passivating gas at a temperature below the phase transformation temperature of the alloy, such that the Curie temperature of the material is increased when the material is formed into a permanent magnet. Rare earth-containing alloys, such as Nd-Fe-B and Sm-Co alloys, can be used. The passivating gas can be nitrogen, carbon dioxide or a combination thereof. The improved permanent magnet can have a nitrogen surface concentration of from about 0.4 to about 26.8 atomic percent if nitrogen is used as the passivating gas. The improved permanent magnet can also have a carbon surface concentration of from about 0.02 to about 15 atomic percent if carbon dioxide is used as the passivating gas.
Inventors:
Bogaytin, Jacob
Application Number:
JP51328291A
Publication Date:
October 13, 1994
Filing Date:
December 12, 1990
Export Citation:
Assignee:
SPSS Technologies, Inc.
International Classes:
B22F1/145; C22C1/04; C22C19/07; C22C33/02; C22C38/00; H01F1/053; H01F1/055; H01F1/057; H01F1/059; (IPC1-7): H01F1/053; B22F1/00; C22C1/04; C22C19/07; C22C33/02; C22C38/00
Attorney, Agent or Firm:
Yuzo Yamazaki (2 outside)