Multilayer coating and method

Details Multilayer coating and method Multilayer coating and method

1984-10-09

1986-10-28

Swisher, Nancy A. B.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428446, 428698, 428699, B32B 904, B32B 1304, B32B 900, B32B 1900

Patent

active

046198652

ABSTRACT:
Multilayer protective coatings that are applied over a substrate are disclosed that comprise a plurality of superimposed multilayer units. Each multilayer unit contains two or more superimposed thin layers in which at least two layers are compositionally different. The properties of the resulting coating are a combination of the properties of the individual layers. One layer of a multilayer unit may provide hardness or wear resistance and another layer may provide lubricity, for example. The thickness of the individual layers can be related to the microscopic surface relief of the substrate to which the protective coating is applied.
One disclosed multilayer unit comprises three layers: an oxidation resistant layer; a nitride layer; and a layer of disordered boron and carbon material.

REFERENCES:
patent: 3367826 (1968-02-01), Heestand et al.
patent: 3804034 (1974-04-01), Stiglich, Jr.
patent: 3895156 (1975-07-01), Hammond
patent: 3977061 (1976-08-01), Lindstrom et al.
patent: 4135601 (1979-01-01), Tsukagoshi et al.
patent: 4442169 (1984-04-01), Graham
patent: 4490191 (1984-12-01), Hale

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