GEORGE E GAZZA
Engineering in North Sudbury, MA
License number
Massachusetts 25349
Expiration Date
Jun 30, 1984
Type
Ceramic Engineer
Address
Address
North Sudbury, MA 01776
Professional information
Transparent Ultrafine Grained Ceramics
US Patent:
4029755, Jun 14, 1977
Filed:
Apr 11, 1973
Appl. No.:
5/350287
Inventors:
George E. Gazza - Sudbury MA
Sunil K. Dutta - Waltham MA
Sunil K. Dutta - Waltham MA
Assignee:
The United States of America as represented by the Secretary of the Army - Washington DC
International Classification:
C01F 704
US Classification:
423600
Abstract:
A pressure sintering process for the fabrication of ultrafine grained cercs having improved strength and enhanced transparency comprising the cold compressing of a ceramic oxide powder having a cubic crystal structure, removing undesired gases, raising to a temperature at which full density of the compact can be obtained in isothermal increments of about 50. degree. under elevated pressures while maintaining the temperature at each incremental increase for a period of about 50-60 minutes, and recovering the product.