Tribological coating

A method of forming a tribological coating 13 on a substrate 12 comprises depositing layers of a relatively soft solid lubricant material 14b, 15b, 16b, 17b and layers of a relatively hard material 14a, 15a, 16a, 17a, wherein at least the soft material is deposited so as to provide a plurality of di...

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Bibliographische Detailangaben
Hauptverfasser:	Ian Kerr, John Rayment Nicholls, Madan Pal, Miroslaw Kula, Jeff Rao
Format:	Patent
Sprache:	eng
Schlagworte:	BEARINGS BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MECHANICAL ENGINEERING METALLURGY ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A method of forming a tribological coating 13 on a substrate 12 comprises depositing layers of a relatively soft solid lubricant material 14b, 15b, 16b, 17b and layers of a relatively hard material 14a, 15a, 16a, 17a, wherein at least the soft material is deposited so as to provide a plurality of discontinuous planar layers interposed between layers of the hard material, permitting underlying and overlying layers of the hard material to interlace. One or both of the materials are preferably deposited by PVD or CVD, most preferably by plasma-assisted PVD. The soft solid lubricant material may comprise a fluoro-polymer such as PTFE or may comprise MoS2. The substrate may be configured as a portion of a plain bearing. A further method of forming a tribological coating on a substrate comprises depositing layers of a relatively soft solid lubricant material 14b, 15b, 16b, 17b and layers of a relatively hard material 14a, 15a, 16a, 17a that is or comprises aluminium, aluminium alloy, silver alloy, Ag-Sn alloy or Sn-Ag alloy. Also disclosed are tribological coatings applied to substrates.