Bearings having an overlay coating containing dispersed phase of a second material
AssigneeT&N Technology Limited
InventorsDavid R. Eastham, Alan D. Pope
Life of this patent
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Abstract
Bearings having an overlay (14) deposited by cathodic sputtering. In one example the overlay comprises an aluminum matrix (22) containing a dispersed phase (24) of tin. The overlay may contain a relatively low content of tin adjacent the interface (18) with the substrate (10;12) rising to a relatively high content at the surface. The surface may comprise a layer (26) of substantially pure tin to act as a sacrificial overlay during initial running of the bearing.
Claims12
A journal bearing including a strong backing material having thereon a relatively thick layer of a bearing material, and having a relatively thin overlay coating, the overlay coating comprising a first material constituting the coating matrix and having therein a dispersed phase of a second material wherein the dispersed phase of the second material has a relatively low content adjacent the bearing material layer and has a relatively high content at the coating surface, the total thickness of said overlay coating being in the range from 10 to 50 micrometers.
Dependencies are inferred from the claim text.