Thermal barrier coating with abrasion resisting function and manufacturing method of thermal barrier coating

Abstract

The invention discloses a thermal barrier coating with the abrasion resisting function. Compared with a traditional thermal barrier coating, carbon powder is added, and is sintered and modified at the high temperature, and the porosity of a ceramic phase can be increased. In the spraying process, part of particles are not smelted sufficiently in plasma jet flow, when a base body is subjected to the impact, the deformation degree is slightly weak, porous structures in lap joint together are easily formed, and the thermal insulation performance of the coating is obviously improved. In addition, by means of the modification method, Zr4+ is replaced by Y3+ and Ce4+ in a zirconium dioxide crystal lattice and the oxygen vacancy and the local stress field are generated. The phonon scattering in the crystal lattice is increased, and the thermal conductivity is obviously reduced. The atomic weight of the solid solution atom Ce is far larger than that of Y, the scattering strength of phonons in the coating can be obviously improved, and therefore the thermal conductivity is reduced. The thermal barrier coating is simple in preparing technology. The prepared coating has the beneficial effects of being high in porosity, resistant to abrasion, low in water absorbing rate, good in tenacity, not prone to cracking or layering and the like.

Description

technical field [0001] The invention relates to the technical field of ceramic material processing, in particular to a thermal barrier coating with wear-resistant function and a manufacturing method thereof. Background technique [0002] With the development of aviation gas turbines in the direction of high flow ratio, high thrust-to-weight ratio, and high inlet temperature, the working temperature in the combustion chamber has far exceeded the service temperature limit of Ni-based superalloys. The preparation of thermal barrier coatings on the surface of superalloy substrates has a very direct effect on improving the temperature bearing capacity of the substrates, thereby effectively increasing the working temperature of parts and prolonging their service life. [0003] Thermal barrier coating is generally a functional coating that utilizes materials with relatively low thermal conductivity and is coated on the surface of superalloy substrates with appropriate technology to...

AI Technical Summary

Problems solved by technology

However, when thermal barrier coatings are applied to increasingly high working temperatures, they will face more harsh working environments. The thermal barrier coatings prepared by the prior art are prone to phase change, low in oxidation resistance, low in strength, and poor in high temperature stability. , easy to produce defects such as high temperature corrosion, it is difficult to meet the needs of further increase in turbine inlet temperature