Piston ring

Details Piston ring Piston ring

1996-10-03

1998-04-28

Turner, Archene

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277224, 277235R, 277DIG6, 148316, 148317, F16J 926

Patent

active

057435367

ABSTRACT:
A sliding member, in which the surface of a substrate is coated with a compound containing at least chromium nitride, wherein a columnar crystal structure is present in a tension fracture surface of the coating, the columns being aligned toward the coating surface from the substrate surface. The coating is formed on the substrate by contacting the substrate with a gas phase mixture containing chromium and nitrogen in a PVD process. In a preferred embodiment the PVD process is an ion plating process. The coating has superior resistance to peeling, abrasion and baking. The sliding member can be used as an engine part or a compressor part.

REFERENCES:
patent: 4212602 (1980-07-01), Buran et al.
patent: 4570946 (1986-02-01), Tsuchiya et al.
patent: 5226975 (1993-07-01), Denton et al.
patent: 5316321 (1994-05-01), Ishida et al.
Wang et al., "The Morphology and Orientation of Cr-N Films Deposited by Reactive Ion Plating," thin Solid Films, vol. 185, Mar. 1990, pp. 219-230.
Chemical Abstracts, vol. 110, No. 16, 17 Apr. 1989, "Characterization of sputtered chromium nitride coatings."

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