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:
Dec. 24, 1985
Filed:
Sep. 07, 1984
Applicant:
Inventors:
Assignee:
Elektroschmelzwerk Kempten GmbH, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ;
U.S. Cl.
CPC ...
501 92 ; 501 97 ; 264 63 ; 264 65 ;
Abstract
The invention is substantially pore-free shaped articles consisting essentially of polycrystalline silicon nitride and polycrystalline silicon carbide in the form of a homogeneous microstructure having grain sizes of not more than 10 .mu.m manufactured from mixtures of Si.sub.3 N.sub.4 powder and SiC powder in a weight ratio of from 5:95 to 95:5 without the concomitant use of sintering aids by isostatic hot pressing in a vacuum-sealed casing at temperatures of from 1800.degree. to 2200.degree. C. and a pressure of from 100 to 400 MPa.