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:
Jan. 10, 1978
Filed:
Oct. 24, 1975
Ronald Charles Garvie, Beaumaris, AU;
Richard Henri Hannink, Oakleigh, AU;
Richard Terry Pascoe, Ashwood, AU;
Commonwealth Scientific and Industrial Research Organization, Campbell, AU;
Abstract
Calcia-partially-stabilized zirconia ceramic materials which contain between 3.3 and 4.7 percent of calcia by weight. Such materials have a fine-scale two-phase microstructure substantially consisting of metastable, tetragonal domains of a critical size within cubic matrix grains, which domains, in regions of high stress, irreversibly transform to normal monoclinic form upon stressing of the body. The materials are produced by firing a zirconia body containing between 3.3 and 4.7 percent by weight of calcia at a temperature between 1700.degree. C and 1950.degree. C and allowing the body to cool at an average rate of at least 175.degree. C per hour to a temperature within the range 1200.degree. to 1450.degree. C; followed by ageing with said temperature range for a time such that peak strength is obtained.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile