Affiliation:
1. Nanjing University of Aeronautics and Astronautics
2. 8511 Institution of Nanjing
Abstract
Chemical vapor deposition nanocrystalline diamond (NCD) film has numerous
unsurpassed properties, among them, bulk modulus, hardness; abrasion resistance and thermal
conductivity are notable ones like polycrystalline CVD diamond film. The super mechanical
properties have made NCD film to be an effective way to improve the resistance performance of the
ceramic bearing and extended its life. The contact stress of bearing ball with NCD coating in elastic
contact was analyzed. Factors such as substrate material, thickness of NCD coating, load and
interlayer material which affect the shear stress distribution of NCD coating on bearing ball were
investigated. The results show that substrate with low elastic modulus and heavy load will enlarge
the difference of equivalent stress value at NCD/substrate interface. Thick film will make the stress
distribution at the interface uniform. Soft interlayer should be inhibited to avoid extra stress in
contact status.
Publisher
Trans Tech Publications, Ltd.
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