The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 29, 1988
Filed:
Nov. 03, 1986
Koichi Yamada, Niihama, JP;
Masahide Mouri, Niihama, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
A method for producing high-density sintered silicon carbide articles useful as wear-resistant materials, corrosion-resistant materials and high-temperature structural materials which comprises mixing powdery silicon carbide composed mainly of .alpha.-phase silicon carbide, a boron compound of from about 0.05 to about 0.15 wt. %, as converted to boron, based thereon and a carbonizable organic substance so that the total of combinable carbon content of the powdery silicon carbide and combinable carbon content of the carbonizable organic substance is from about 4 to about 8 wt. %, molding the resulting mixture, and subjecting the molded product to heating at a temperature of from about 1,000.degree. C. to about 2,000.degree. C. in a vacuum and then sintering at a temperature of about 2,300.degree. C. or less in an inert atmosphere to obtain a sintered silicon carbide article having a sintered density of about 90% or more of the theoretical density.