Article having a wear resisting precious metal coating

Details Article having a wear resisting precious metal coating Article having a wear resisting precious metal coating

1986-11-03

1988-05-17

Zimmerman, John J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Laterally noncoextensive components

428669, 428670, 428672, 428673, 428935, 428938, B32B 1504

Patent

active

047450355

ABSTRACT:
The article is provided with a coating resisting wear and corrosion, such coating being for the most part made of a precious metal or alloy of a precious metal, for example gold or an alloy containing gold.
The coating is made up of a first layer of such precious metal or alloy thereof comprising discrete inclusions of a metallic compound such as titanium nitride. These inclusions are deposited along with the precious metal in vapor phase and distributed in a substantially homogeneous manner through the entire thickness of the layer, said thickness being equal to or greater than 0.4 .mu.m. A second layer of precious metal or alloy thereof is located between the article and said first layer.
The article may be a watch case, a bracelet link or a piece of jewelry.

REFERENCES:
patent: 3481854 (1969-02-01), Lane
patent: 3606766 (1971-09-01), Hill
patent: 4226082 (1980-10-01), Nishida
patent: 4252862 (1981-02-01), Nishida
patent: 4403014 (1983-09-01), Bergmann
patent: 4517217 (1985-05-01), Hoffman
patent: 4525433 (1985-06-01), Heywood
Thin Solid Films, vol. 39, pp. 165-174 (1976). Article by G. Taylor et al. "Properties of Metal Deposited Films".

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