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:
Feb. 08, 1983
Filed:
Jan. 04, 1982
Ivor E Denton, Wantage, GB;
John W Henney, Abingdon, GB;
United Kingdom Atomic Energy Authority, London, GB;
Abstract
The invention is concerned with preparation of dense ceramics, in particular silicon carbide. Silicon carbide is a useful structural material but difficulties of densifying by sintering have in the past created problems in the production of silicon carbide components. It is however known to use boron and carbon as additives to assist densification by sintering. In this invention a further improvement in densification is effected by carrying out such sintering in a carbon-containing reducing atmosphere such as a methane containing atmosphere. Surface silica which inhibits densification is thereby removed but without removing fine carbon.