Title:
PRODUCTION OF CORROSION-RESISTANT SILICEOUS NITRIDE SINTERED MEMBER
Document Type and Number:
Japanese Patent JP3393612
Kind Code:
B2
Abstract:
PURPOSE: To obtain a siliceous nitride sintered member having improved corrosion resistance without impairing mechanical characteristic by removing a part of a surface layer formed on the surface of the siliceous nitride sintered member by machining not to damage the part of the surface layer.
CONSTITUTION: A siliceous nitride sintered member is machined by grinding with a diamond grinder of about #140 count to form a surface layer having about 50μm layer changed in qualities. Then the surface layer is abraded dividedly at two stages by primary adrasion using ≤50μm grinder particles and by secondary abrasion using one or more of ≤15μm grinder particles and Fe2O3 powder. Then, one or more parts of the surface layer are removed up to 20μm depth from the machined surface or the surface layer part is removed up to a depth at which compression stress is at least ≤50MPa. Or, the surface layer is heat-treated in a nonoxidizing atmosphere at ≤1,550°C to produce a siliceous nitride sintered member.
Inventors:
Satoshi Iio
Kenichi Mizuno
Kenichi Mizuno
Application Number:
JP24045093A
Publication Date:
April 07, 2003
Filing Date:
August 31, 1993
Export Citation:
Assignee:
Nippon Special Ceramics Co., Ltd.
International Classes:
C04B35/584; B24B1/00; C04B41/80; C04B41/91; (IPC1-7): C04B35/584; B24B1/00; C04B41/80; C04B41/91
Domestic Patent References:
| JP4115859A | ||||
| JP5155663A | ||||
| JP5201766A | ||||
| JP2271966A | ||||
| JP648813A | ||||
| JP5305561A | ||||
| JP60122783A | ||||
| JP61106473A | ||||
| JP60151290A | ||||
| JP5240326B1 |
Attorney, Agent or Firm:
Masayuki Yano