Effect of high-voltage pulses on the structure and properties of titanium nitride vacuum-arc coatings

Abstract

The structure, the stress-strain state, and the mechanical properties (hardness and wear resistance) of titanium nitride coatings deposited on a substrate by a vacuum-arc method at constant (from -5 V to -230 V) and high-frequency pulse (-1000 V) negative potentials are studied. The laws of formation of the coatings are determined. The formed coatings are analyzed using a model of two-level action of the implanted ions on them.

Cutting ceramic inserts: the influence of abrasive machining and surface coatings on the operational characteristics

“…Metallurgical and technological defects can be fracture nuclei. The defects of the second type are laid on the operations of heat treatment and machining [16][17][18].…”

Arc-Evaporated Nanoscale Multilayer Nitride-Based Coatings for Protection Against Wear, Corrosion, and Oxidation

“…Results of scientific researches show the tendency of active use of nitrides and borides of transition metals and their combination in the development of protective materials [16][17][18][19][20][21][22][23][24][25]. While nitrides of single elements are studied well enough, their multilayer modifications need study that is more detailed [26][27][28][29][30][31][32][33][34][35].…”

Use of laser ablation for formation of discontinuous (discrete) wear-resistant coatings formed on solid carbide cutting tool by electron beam alloying and vacuum-arc deposition

“…As the previous research has shown, maximum allowed laser power density is 0.25 J/cm 2 [9,17]. If this value is exceeded, the cracks formation or the surface fusion in the working area is observed [18]. For that reason, special equipment allowing permanent control of the cutting tool position in relation to the laser beam needs to be used.…”

“…The electron beam heats the surface to the high temperature and initiates a chemical reaction of solid-and liquid-phase carbides formation between thin metal film and carbon present in the substrate in free or bound state. Available data shows that the cutting tools subjected to such treatment with the consequent vacuum-arc coating deposition satisfy the strict requirements for quality, durability and productivity [18,19]. After that, the gradient (TiAl)N coating with the thickness of 5−7 μm was deposed onto the a tool surface with the alloyed layer using the Platit π80 coating unit.…”