Metal-ceramic composite material and process for its production

Details Metal-ceramic composite material and process for its production Metal-ceramic composite material and process for its production

C - Chemistry, Metallurgy

22

C

C22C 29/12 (2006.01) B22F 3/00 (2006.01) C04B 35/043 (2006.01) C04B 35/45 (2006.01) C22C 1/05 (2006.01) C22C 1/10 (2006.01) C22C 5/06 (2006.01) F16C 33/04 (2006.01)

Patent

CA 2190331

Metal-ceramic composite materials which combine advantageous properties of ceramic and metal and have the composition (Mg1-xCux)O + Agy, where 0.03 ~ x ~ 0.25 and 0.001 ~ y ~ 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°C - 1100°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 ~ y ~ 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 ~ y ~ 0.2, they are suitable as electrical contact materials in fuel cells and for abrasion- resistant sliding contacts. When 0.15 ~ y ~ 0.5, the composite materials have a high conductivity.

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