Ceramic formed body with a high crack arrestability

US4506024A · kind A · utility

Assignee

• Max-Planck-Institut zur Foerderung der Wissenschaften e.V. · DE

Inventors

• Nils Claussen · Schwäbisch Hall, DE
• Gunter Petzow · Echterdingen, DE

Key dates

• Filing date: Sep 1, 1983
• Grant date: Mar 19, 1985
• Expiry date: Sep 1, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/96
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present invention is concerned with a ceramic formed body comprising a ceramic matrix and at least one phase of ceramic incorporation material dispersed therein, characterized by a dense, microcrack-free ceramic base matrix and compressive zones incorporated therein which consist of a mixture of the base matrix material with unstabilized zirconium dioxide particles which are predominantly monoclinic at ambient temperature. The present invention is also concerned with a process for the production of such ceramic formed bodies and with the use thereof as constructional elements in the hot region of heat engines.