The influence of the substrate material and the angle of deposition on the macrostructure of a capil-lary porous titanium coating

Porous surfaces are used in endoprosthetics, catalytic devices, various adhesive joints, and heat exchangers. In this paper, the dependencies of the macrostructure parameters of capillary porous coatings on the angle of deposition and the substrate material are established. These dependencies make it possible to adjust surface characteristics, which is necessary to achieve desired properties of coatings. However, the scientific literature does not adequately describe the effect of technological parameters on the structure and macrostructure of plasma-sprayed titanium coatings. The influence of the substrate material on the structure of a capillary porous coating made of titanium BT1-0 is investigated along with the influence of the angle of deposition on the macrostructure and porosity of a plasma titanium coating deposited on a substrate made of titanium alloy VT6. A regression analysis of the dependence of the coating characteristics on the angle of deposition is carried out. It is shown that the substrate material significantly affects the coating structure. The established dependences of the pore sizes and porosity of the plasma coating on the angle of deposition make it possible to choose proper plasma spraying process parameters so as to obtain coatings with desired properties.

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