Highly shock-resistant ceramic material

Details Highly shock-resistant ceramic material Highly shock-resistant ceramic material

C - Chemistry, Metallurgy

04

B

C04B 35/593 (2006.01) C04B 35/486 (2006.01) C04B 35/488 (2006.01) C04B 35/575 (2006.01) C04B 35/634 (2006.01) C04B 35/645 (2006.01) F16C 33/30 (2006.01) F16C 33/32 (2006.01)

Patent

CA 2495998

Ceramic material of high impact strength, in particular based on Si3N4 or ZrO2, having an HV10 hardness of not more than 15.5 GPa and an E modulus at room temperature of less than 330 GPa, wherein the material contains 0.2 to 5 wt.% of carbon particles which have a maximum particle size of 5 µm, a process for the preparation of the ceramic material and the use thereof, in particular as roller bodies in bearings.

L'invention concerne un matériau céramique présentant une grande résistance aux chocs, notamment à base de Si¿3?N¿4? ou de ZrO¿2?, présentant une dureté HV10 maximale de 15,5 GPa et un module d'élasticité à température ambiante inférieur à 330 GPa, ledit matériau contenant 0,2 à 5 % en poids de particules de carbone qui présentent une grandeur de particule maximale de 5 ?m. L'invention concerne également un procédé pour la production dudit matériau céramique et l'utilisation de ce dernier, notamment comme corps de roulement dans des paliers.

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