Chromium nitride film and method for forming the same

Details Chromium nitride film and method for forming the same Chromium nitride film and method for forming the same

1998-06-25

2000-07-18

Yee, Deborah

Metal treatment

Process of modifying or maintaining internal physical...

Carburizing or nitriding using externally supplied carbon or...

148230, 148238, 148217, 148214, 420317, 420318, C21D 106, C23C 824, C23C 826

Patent

active

06090223&

ABSTRACT:
By forming a Cr playing layer on the surface of a metal and forming a CrN film by nitriding the surface thereof, it is possible to improve the surface hardness, wear resistance, corrosion resistance, etc., of the metal; wherein the nitriding treatment of the Cr plating layer surface is carried out by a method of heating in a nitrided atmosphere, preferably heated in a nitrided atmosphere which includes an ammonia decomposed gas treated in advance with an ammonia decomposition catalyst as a nitrogen source; in addition it is preferable that before the nitriding treatment, the Cr plating layer surface is purified and activated by heating in a halogen compound or a reacting gas which includes halogen.

REFERENCES:
patent: 5141567 (1992-08-01), Tahara et al.
patent: 5226975 (1993-07-01), Denton et al.
patent: 5403409 (1995-04-01), Tahara et al.

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