Laser modification of ceramic gas-thermal coatings

The possibilities of laser processing (LP) as a promising method of post-treatment of ceramic coatings, which allows to achieve a significant increase in their performance characteristics, are considered in the work. Data on the implementation of this method in the processing of ceramic coatings applied using gas thermal spraying (GTN) technologies using various laser equipment are presented. It has been established that LP has a significant effect on the microstructure of ceramic gas-thermal coatings (GTP), provides a higher density, reduces dispersion and porosity by 2-4 times, and allows you to regulate the distribution and value of residual stresses. It is shown that with the help of LP, it is possible to improve the performance characteristics of coatings, increase microhardness by 25-40%, increase the adhesive strength of the coating and the metal base, wear resistance and corrosion resistance. The data testifying to the ambiguity of the influence of LP modes during post-processing of ceramic coatings on their properties and the inadmissibility of excessive melting of the surface are presented.