Coating processes – Coating by vapor – gas – or smoke – Metal coating
Reexamination Certificate
2010-02-23
2011-12-13
Gambetta, Kelly M (Department: 1715)
Coating processes
Coating by vapor, gas, or smoke
Metal coating
C427S248100, C427S127000
Reexamination Certificate
active
08075954
ABSTRACT:
The object of the present invention is to improve the productivity of a permanent magnet and to manufacture it at a low cost by effectively coating Dy and Tb on a surface of the magnet of Fe—B-rare earth elements having a predetermined configuration. The permanent magnet of the present invention is manufactured by a coating step for coating Dy on the surface of the magnet of Fe—B-rare earth elements having a predetermined configuration and a diffusing step for diffusing Dy coated on the surface of the magnet into crystal grain boundary phases of the magnet with being heat treated at a predetermined temperature. In this case, the coating step comprises a first step for heating a process chamber used for carrying out the coating step and generating metallic vapor atmosphere within the process chamber by vaporizing vaporizable metallic material previously arranged within the process chamber, and a second step for introducing into the process chamber the magnet held at a temperature lower than that within the process chamber and then selectively depositing the vaporizable metallic material on a surface of the magnet by an effect of temperature difference between the temperature within the process chamber and that of the magnet by the magnet reaches a predetermined temperature.
REFERENCES:
patent: 5147447 (1992-09-01), Takeshita et al.
patent: 2006/0278517 (2006-12-01), Machida et al.
patent: 2007/0034299 (2007-02-01), Machida et al.
patent: 62-074048 (1987-04-01), None
patent: 62-267469 (1987-11-01), None
patent: 2004-296973 (2004-10-01), None
Office Action from Chinese Patent App. No. 1006800087263 (Feb. 27, 2009).
Park, K. T., “Improvement of coercive on thin Nd2Fe14B sintered permanent magnets,” A doctor's thesis of Touhoku University, Mar. 23, 2000.
Suzuki, S., et al., “Nd-Fe-B kei Bisho Jishaku no Hyomen Kaishitsu ni yoru Kotokuseika,” Dai 27 Kai The Magnetics Society of Japan Gakujutsu Koen Gaiyoshu, 2003, p. 386.
Nagata Hiroshi
Shingaki Yoshinori
Cermak Nakajima LLP
Gambetta Kelly M
Nakajima Tomoko
Ulvac Inc.
LandOfFree
Coating method and apparatus, a permanent magnet, and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coating method and apparatus, a permanent magnet, and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coating method and apparatus, a permanent magnet, and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4313248