JAMES A DERKACY
Real Estate Commission in Pittsburgh, PA
License number
Pennsylvania RS177821L
Category
Real Estate Commission
Type
Real Estate Salesperson-Standard
Address
Address
Pittsburgh, PA 15239
Professional information
High Impact Resistant Ceramic Composite
US Patent:
5032550, Jul 16, 1991
Filed:
Oct 13, 1989
Appl. No.:
7/420922
Inventors:
James A. Derkacy - Pittsburgh PA
Assignee:
Aluminum Company of America - Pittsburgh PA
International Classification:
C04B 3558
US Classification:
501 92
Abstract:
A ceramic material and a method of forming a ceramic material which possesses a high impact resistance. The material comprises: (a) a first continuous phase of. beta. -SiC; and (b) a second phase of about 25-40 vol % TiB. sub. 2. Al. sub. 2 O. sub. 3 is preferably used as a densification aid. The material is formed by hot-pressing the mixture at a temperature from greater than about 1800. degree. C. to less than the transition temperature of. beta. -SiC to. alpha. -SiC. The hot-pressing is performed at a pressure of about 2000 psi to about 4000 psi in an inert atmosphere for several hours and results in the formation of a two phase sintered ceramic composite material.