Formation of the Surface Layers of a Material with Shape-Memory-Based TiNiCo Diffusion Metallization

Abstract

The formation of a surface layer of diffused TiNiCo was carried out by metallization of fusible metal melt under isothermal conditions in an argon atmosphere at a temperature of 1100–1150 °C. The driving force of the process is the difference in concentration of alloying elements on the surface of the workpiece melt. A melt of lead or eutectic Pb-Bi was used as a transport medium, whose elements are in saturated atomic state and in direct contact with the surface of workpieces. This molten surface-activated product was purified from oxide films, providing a high wettability, which in turn provides good adhesion. Dissolved melt powders of Ti, Ni, and Co were first adsorbed on the surface of the items and then diffused into the surface of the volume. The cementation process was carried out cyclically by lifting the melt products every 25–30 minutes. The duration of the saturation process was 11–13 hours, depending on the desired coating thickness.

The Formation of Nanostructured Surface Layers of a Material with Shape Memory Effect of the TiNi Deposition Melt of the Fusible Metal at a Temperature Gradient

“…As for the functional properties of the surface layers of materials with shape memory strict observance of the chemical and phase composition is Applied Research in Materials and Mechanics Engineering neccessary, the very important task is to clean inert gas (argon) of impurities. For spectrally pure argon in the formation of coatings with SME apparatus for individual and continuous purification of argon type mixers [5] was used.…”

Predicting the Thickness of the Hardening Coating during Diffusion Metallization of Cast Iron

“…Methods of chemical-thermal treatment are the most promising methods for hardening the surface of products made of high-strength cast iron. Methods of diffusion metallization are widely used among them [1,2,3,4]. Diffusion metallization restores parts with low wear, high surface hardness and working under conditions of friction with a variety of mating materials [5].…”

Formation of Composite Surface Layers TiNiTa + cBN-Co-NiAl-Y Considering their Properties

“…It is known that intelligent materials with shape memory effect (SME) have a wide range of features. Their use in the formation of composite surface layers can be very productive, providing wide range of desirable features: superelasticity, wear and corrosion resistance, high damping capacity, durability, crack resistance, adaptability [1][2][3][4][5][6][7].…”