Abstract
This article investigates the influence of thermal annealing on microhardness and wear resistance of the surface of steel U9/Y9 protected by a composite coating Ti 3 SiC 2 /TiC obtained by detonation sputtering. Thermal annealing was performed in the range of temperatures 700-900 ◦ C during 1 hour. Following annealing the formation of TiO 2 and an increase in the phase content of Ti 3 SiC 2 are observed. Higher microhardness was obtained in coatings subjected to annealing at 800 ◦ C, which can be explained by an increase in the content of carbonized titanium. As the annealing temperature rises further, the thickness of the oxide layer increases, leading to a decrease in the microhardness for the coatings annealed at 900 ◦ C. According to the results of tribological tests, formation of the oxide increases wear resistance of Ti 3 SiC 2 /TiC composite surface coatings.
Highlights
There is widespread use for the restoration of worn surfaces of a variety of products are found to be based on titanium carbocylicide
This article investigates the influence of thermal annealing on microhardness and wear resistance of the surface of steel U9/Y9 protected by a composite coating Ti 3 SiC 2 /TiC obtained by detonation sputtering
Titanium carbide and titanium silicide those substances are ternary compounds that correspond to the formula Mn +1 AXn, where M is a transition metal, A is an element of IIIA or IVA groups, X is carbon or nitrogen, n = 1, 2 or 3
Summary
There is widespread use for the restoration of worn surfaces of a variety of products are found to be based on titanium carbocylicide. Titanium carbosilicide as an unique composite material includes properties of titanium carbide and titanium silicide. Eurasian Journal of Physics and Functional Materials, Vol 4(1). A unique distinctive feature of these materials is the layered structure of their crystal lattice - the regular arrangement of the layers of atoms M and A elements ( the name "nanolaminates"), which have a lower binding energy between them. There are many works devoted to the study of hardness and wear resistance of Ti 3 SiC 2 coatings [3, 4]; only a few of these coatings were obtained by the method of detonation sputtering. Various properties of coatings obtained by the method of detonation spraying and other methods are noted; by this, it is of interest to study the tribological properties of the Ti 3 SiC 2 detonation coating
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