Functional Plasma-Deposited Coatings
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Lublin University of Technology, Lublin, Poland
Engineering Department, National Aviation University, Kyiv, Ukraine
Publish date: 2017-12-05
Adv. Sci. Technol. Res. J. 2017; 11(4):301–304
The paper focuses on the problem of low adhesion of plasma sprayed coatings to the substrate. The subsequent laser treatment modes and their influence on the coating-substrate interface were studied. This allows to decrease the level of metstability of the coating, thus decreasing its hardness down to 11-12 GPa on the surface and to about 9 GPa on depth of 400 µm. The redistribution of alloying elements through solid and liquid diffusion improves mechanical properties and rises the adhesion up to 450 MPa after remelting and up to 90-110 MPa after laser-aided thermal cycling. At he same time, remelting of coating helps to decrease its porosity down to 1%. Obtained complex of properties also allows to improve wear resistance of coatings and to decrease friction factor.
Mykhaylo Pashechko   
Lublin University of Technology, Nadbystrzycka 38, 20-615 Lublin, Poland