Abstract
Adherent diamond-like hydrocarbon (DLHC) coatings were applied on AISI M-50, 52100, carburized 4118 and 440C steel rods by using an amorphous silicon hydrocarbon (a-SiC:H) bonding layer approximately 0.2 μm thick between the DLHC and the steel. Both the a-SiC:H and DLHC coatings were applied using a single, broad-beam ion source. The rods were subjected to rolling contact fatigue (RCF) testing under high cyclic hertzian stress (5.5 GPa), low lubricant film thickness parameter (λ = 0.7) conditions. The coatings generally induced order-of-magnitude increases in the fatigue lives of the materials.
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