Metal bearing element with a score-resistant coating
AssigneeGeneral Motors Corporation
InventorsBernard A. Mac Iver, James C. Erskine, Jr., John C. Bierlein
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Abstract
A bearing element having an adherent score-resistant coating on its surface comprising a carbonized layer of an organic resin in which the layer is carbonized by ion implantation. The ion implantation is controlled to not only provide graphite-like and diamond-like structures in the carbonized coating but to also produce chemical bonding between carbon atoms of the resultant coating and atoms of the bearing surface.
Claims1
A bearing element having and adherent, hard, antifriction coating thereon, wherein the bearing element has a surface consisting essentially of an iron-based alloy for sliding contact with metals, such as aluminum based alloys, a carbonized layer thereon of a sulfur-free methacrylate-type resin that contains silicon carbide, graphic-like and diamond-like crystalline microstructures therein, and an interfacial zone between the carbonized coating and the iron-based alloy surface containing chemical compounds of iron and carbon that bond the carbonized coating to the iron-based alloy surface.
Dependencies are inferred from the claim text.