Plasma coatings of (TiCrC)-(FeCr) composite powder alloys: Structure and properties

Abstract

The coatings of the (TiCrC)-(FeCr) composite are deposited on steel and titanium alloy by plasma method. The composition, structure, and tribotechnical properties of these coatings are studied in comparison with traditional materials based on the Ni-Cr alloy. The effect of preliminary surface treatment methods, i.e., sandblasting treatment and electrospark alloying, on coating properties is examined. The fretting corrosion of coatings is investigated. It is established that coatings based on double titanium-chromium carbide have considerably greater wear resistance than that of Ni-Cr alloys at almost equal friction coefficients. It is established that electrospark alloying is competitive with traditional sandblasting treatment in environmental effect and coating-to-based adhesion.

Microstructure and Tribological Behavior of Plasma Sprayed (Ti,Cr)C-Ni Composite Coatings

“…As a solid solution, the (Ti,Cr)C is expected to possess the main advantages of TiC with higher oxidation resistance owing to the formation of Cr2O3 [11]. In order to improve the fracture toughness and cohesion of coatings, the metal or alloy powder are introduced as the binder into (Ti,Cr)C-based composite powders [12][13][14][15][16][17]. Among metal binders, Ni is an attractive component for cermet coatings due to its high toughness and oxidation resistance [18].…”

Structure and Wear Behavior of (Ti,Cr)C-Ni Detonation Sprayed Coatings

“…Several attempts have been made to produce the (Ti,Cr)C-based metal-ceramic materials and protective coatings [9][10][11][12][13]. It was shown, that the (Ti,Cr)C-FeCr plasma-sprayed coatings demonstrate a high wear resistance under fretting conditions [9].…”

“…Several attempts have been made to produce the (Ti,Cr)C-based metal-ceramic materials and protective coatings [9][10][11][12][13]. It was shown, that the (Ti,Cr)C-FeCr plasma-sprayed coatings demonstrate a high wear resistance under fretting conditions [9]. Besides, the (Ti,Cr)C-based cermet coating has erosion resistance, comparable to that of the tungsten carbide cermet coating, but with a much higher thermal shock resistance [10].…”