With the development of aviation, aerospace and civil technology, the temperature requirement of hot end parts is higher and higher, which has reached the limit of superalloy and single crystal materials. Take the heated parts of the fuel turbine, such as nozzle, blade and combustion chamber, for example, they are in the harsh environment of high-temperature oxidation and high-temperature airflow erosion, bearing the temperature as high as 1100ºC, which has exceeded the limit temperature (1075ºC) for the use of high-temperature nickel alloy. The metal of high strength, high toughness and high temperature resistance of the ceramic was prepared by combining the advantages of thermal barrier coating can solve the above problems, it can have the effect of heat insulation, anti-oxidation, anti-corrosion, has been in the hot end of steam turbine, diesel generators, jet engines on material has a certain application, and extend the service life of the hot end parts.
Thermal barrier coatings can significantly reduce the temperature of the substrate, have high hardness, good chemical stability, prevent high temperature corrosion, prolong the service life of hot end parts, improve engine power and reduce fuel consumption, etc. The emergence of TBCS has opened up a new way to greatly improve the performance of aeroengine. Since the 1970s, the United States, the United Kingdom, France, Japan and other developed industrialized countries have been competing to develop TBCS coating, and a large number of applications in blade, combustion chamber, heat insulation screen, nozzle, flame tube, tail nozzle and other hot end parts of the aircraft engine.
Thermal barrier coatings (TBCs) have been applied to turbine blades of aircraft engines in China, and some TBCs have been sprayed on turbine blades, and some initial achievements have been made. The application of thermal barrier coating technology can greatly improve the comprehensive performance of gas turbine engines and ground, prolong its service life, is one of the key technology of high performance engines and gas turbine development, with China's large aircraft, ground gas turbine, solid fuel engine technology advances, the demand for thermal barrier coating will be more and more big, Thermal barrier coatings (TBCs) will be widely used in hot end parts in aerospace, naval ships, nuclear industry, automobiles and other fields. At the same time, thermal barrier coating manufacturing process and equipment will be continuously improved, designers will have a more comprehensive understanding of thermal barrier coating, thermal barrier coating technology personnel will be more skilled.