Inflaming retarding and oxidation resistance thermal barrier coating and manufacturing method thereof

Abstract

The invention discloses an inflaming retarding and oxidation resistance thermal barrier coating. Compared with a traditional thermal barrier, carbon powder is added and modified through high-temperature calcination, and therefore the porosity of a ceramic phase can be improved. In addition, by means of a 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 produced. 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 a product can be obviously improved, and therefore the thermal conductivity is reduced. The preparing technology is simple. The prepared coating is high in surface hardness, low in water absorbing rate, good in tenacity, not prone to cracking, good in interface combining force and even in organization component, and the prepared coating has stable oxidation resistance performance and long service life in the high-temperature using environment.

Description

technical field [0001] The invention relates to the technical field of ceramic material processing, in particular to a heat-insulating and oxidation-resistant thermal barrier coating 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 te...

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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