Abstract
Capillary-porous surfaces are used in endoprosthetics as well as in catalytic converters and heat exchangers to increase the strength of adhesive bonding. Plasma spraying is one of the methods to obtain rough coatings for capillary-porous surfaces. Determining the relationships between the parameters of macrostructure of capillary-porous surfaces and the technological factors of the plasma spraying process enables one to control the surface characteristics. It is an important and fundamental element in the formation of the required properties of the surface. However, studies on the influence of technological parameters of plasma spraying on the construction and macrostructure of plasma-sprayed titanium surfaces are insufficient in scientific literature. This paper presents a study on the influence of roughness, curvature and the material of the supporting plate surface, as well as distance and angle of spraying on the structure of a VT1-0 titanium capillary porous coating applied to a VT6 titanium alloy supporting plate. A regression analysis of the experiment results is performed. It is shown that all the parameters have a significant influence on the surface structure. The experimentally obtained relationships make it possible to produce surfaces with required macrostructure parameters. They help to evaluate the possibility of obtaining titanium surfaces of this kind and thoroughly select parameters of the plasma spraying process in order to obtain surfaces with the required properties.
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