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:
Jun. 16, 1998
Filed:
Nov. 08, 1996
Claus Schuler, Widen, CH;
ABB Research Ltd., Zurich, CH;
Abstract
Metal-ceramic composite materials which combine advantageous properties of ceramic and metal and have the composition (Mg.sub.1-x Cu.sub.x)O+Ag.sub.y, where 0.03.ltoreq.x.ltoreq.0.25 and 0.001.ltoreq.y.ltoreq.0.5, can be produced in a one-stage process. In this process, sintering is carried out in air at a sintering temperature in the temperature range of 980.degree. C.-1100.degree. C. for a sintering time in the range of 1.5-2.5 hours. The rate of temperature rise from room temperature to the sintering temperature is in the range of 8-50 K/min. When 0.01.ltoreq.y.ltoreq.0.1, such composite materials are suitable as materials having high toughness for low-friction, self-lubricating sliding bearings, in particular of ceramic. When 0.1.ltoreq.y.ltoreq.0.2, they are suitable as electrical contact materials in fuel cells and for abrasion-resistant sliding contacts. When 0.15.ltoreq.y.ltoreq.0.5, the composite materials have a high conductivity.