Gas turbines and aircraft engines are important power equipment. In order to improve output power and operating efficiency, gas turbines have been developing towards increasing turbine inlet temperature in recent years. At present, the turbine inlet temperature of ground-based gas turbines is above 1400℃, and the gas temperature of advanced military gas turbines is even 1500-1800℃. Such high temperatures make the operating environment of the hot end components of the gas turbine very harsh, and they need to withstand high-temperature oxidation, corrosion, airflow scouring, high-temperature creep and thermomechanical fatigue.

However, the nickel-based high-temperature alloy used in the component substrate has a temperature limit of only about 1100°C, which cannot meet the application requirements of gas turbines or aircraft engines. Thermal barrier coatings (TBCs) are composite coatings composed of a metal bonding layer and a ceramic layer with good heat resistance and thermal insulation. Its working principle is to reduce the surface temperature of the part by isolating the heated substrate from the high-temperature medium. Its preparation method is not limited by the shape of the hot end component and has almost no effect on the mechanical properties of the substrate. Therefore, preparing thermal barrier coatings on the surface of high-temperature components is the preferred economical and effective way to increase the temperature tolerance of components.

However, the service environment of thermal barrier coatings is extremely harsh, and it is easy to fail due to spalling. Many phenomena show that high-temperature oxidation is the most complex factor causing the failure of thermal barrier coatings in service. Studies have shown that compared with a single rare earth oxide stabilizer, multiple rare earth oxides co-stabilizing zirconium oxide can not only reduce the thermal conductivity of thermal barrier coating materials, but also improve the phase stability and thermal shock resistance of the coating at high temperatures.

Suzhou KP Chemical Co., Ltd can provide thermal barrier coating material raw materials Rare earth oxides such as Samarium oxide, Gadolinium oxide, Holmium oxide, Neodymium oxide, Ytterbium oxide, Yttrium oxide and Scandium oxide. Please contact info@szkpchem.com or 086-18915544907.