Influence of Titanium Surface Porosity on Adhesive Strength of Coatings Containing Calcium Silicate

Ivan Zhevtun, Pavel Gordienko, Yury Kulchin, Alexander Nikitin, Dmitry Pivovarov, Sofia Yarusova, Andrey Golub, Pavel Nikiforov, Vadim Timchenko
2020 Materials  
Titanium-based alloys are widely used in aerospace engineering. They have good mechanical and corrosion properties but, in some cases, the material itself or the coating should meet some additional requirements. For example, it may be a requirement of high reflectance to provide effective temperature control. Wollastonite is a promising component for reflective coatings because it improves both their whiteness and mechanical properties. This paper presents the results of studying the
more » ... , the structure and the adhesive strength of wollastonite-containing silicate coatings to titanium substrate. The surface of titanium samples was pre-treated by laser cladding with TiC and etching to provide surface porosity. It has been shown that such treatment allows a significantly increase in the adhesive strength of the coating to the substrate. A decrease in the adhesive strength was observed on titanium samples with an excess of TiO2 on the surface. This is caused by the formation of crystalline PbTiO3 at the interface.
doi:10.3390/ma13204493 pmid:33050474 fatcat:fg5izckvc5hexb5xwxjj4tn23u