WIT Press

Residual Stress Measurements Of Silicon Nitride And Coated Tungsten Carbide Rolling Contact Elements

Price

Free (open access)

Paper DOI

10.2495/SURF970311

Volume

17

Pages

10

Published

1997

Size

912 kb

Author(s)

M. Hadfield, R. Ahmed & S. Tobe

Abstract

High quality ceramic materials used in rolling element bearing applications show some practical advantages over traditional bearing steels. Silicon nitride has been found to have the optimum combination of properties suitable for certain high speed, low mass and high stiffness applications. Hybrid silicon nitride rolling element bearings are now supplied as standard components by manufacturers. Coatings may also be considered to enhance the capability of hybrid bearings for applications such as high speed and high temperature. A modified four-ball machine was employed to produce accelerated rolling contact fatigue failures of these materials. Silicon nitride verses steel, silicon nitride verses silicon nitride and tungsten carbide coating verses steel configurations were considered. The lubricated tests were performed at relatively high loads and

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