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Title: The influence of heterogenous porosity on silicon nitride/steel wear in lubricated rolling contact
Authors: Kang, J
Hadfield, M
Keywords: Bearing material;Ceramic balls;Friction;Fatigue
Issue Date: 2000
Publisher: Elsevier
Citation: Ceramics International, 26(3): 315-324
Abstract: Heterogeneous porosity is detected on the surface and subsurface of hot isostatically pressed (HIPed) silicon nitride spherical rolling elements. The extent of the localised porosity accounts for an area of 6% of the rolling element surface and 4% of the material volume. An experimental investigation using a rotary tribometer is described to compare the lubricated rolling wear mechanisms and performance of HIPed silicon nitride with heterogeneous porosity defect in contact with steel. A brief review of previous investigations is presented. Localised porosity detection using white and violet light microscopy with post-test evaluation is described. Discussions, micro-hardness measurements and scanning electron microscopy illustrations are presented. Critical localised porosity size is evaluated from experimental results.
ISSN: 0272-8842
Appears in Collections:Design
Mechanical and Aerospace Engineering
Brunel Design School Research Papers

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