CVD Technology for Preparing Chromium Oxide Coatings, Study of the Kinetics of Growth of Coatings

Abstract

Metal coating nowadays is very essential in heavy industry and many other applications, however, a coating system is designed and built to obtain pyrolytic Chrome-Oxide Cr2O3, so oxygen is distributed through the coating in order to enhance its properties depending on metal-organic compounds (MOC). A very large number of experiments have been performed to study the effect of oxidant comparing with inert atmosphere. A chemical vapor deposition method for preparing chromium oxide Cr2O3 coatings from bis-arene chromium compounds has been performed, followed by studying the effect of oxidant substances concentration on the kinetics of growth of coatings. The main finding is that coatings exhibit excellent adhesion, high microhardness, and wear resistance. The coating process is characterized by high adaptability and relatively low cost.

Forming of Composite Cutting Layer on Tool Steel by Heat Treatment of CVD Coatings

“…Among these techniques, the methods of coatings deposition are of special interest [1][2][3]. CVD method (Chemical Vapour Deposition) consists in condensation of a metal at a substrate after its reduction from decomposed chemical compound [4][5]. The technique of vapor deposition of chromium coatings from socalled MOC (metal-organic compounds) is an effective method for tool steels strengthening [3,5].…”