Metal-ceramic composite material
US5767029A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 8, 1996 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Nov 8, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C33/043
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.