Studyonanti-oxadation And Anti-corrosion Of Nano Tbcsand Rare Earths Doped Tbcs By APS

The thermal barrier coating is akind of multilayer material, which can protect themetallic materials from high temperature, and it is popular with the turbo blade in planeengine. In order to improve the service life and the thermal insulation quality of heatinsulating coating, scientists changed the durability from the point of materials science byvirtue of nano materials, improving the specific heat and thermal expansion coefficient,lowering thermal conductivity and elasticity modulus, and getting a higher bonding strength.The changes are able to protect the base material from damage from the outside. The workenvironment of thermal barrier coating is very harsh, not only the high temperature but alsothe high oxidation and corrosive, and the thermal cycling stress, erosion can affect the coatingas well as the external objects. Therefore a more advantageous thermal barrier coating isneeded to meet higher thrust-weight ratio of engine. It is found that some rare earth elementscould enhance the thermostability of YSZ, so that the experimental contents of this paper area group of contrasting experiment between the micron zirconia doped by10%(wt%) REOCeO2and nano zirconia, common micron zirconia.In the high temperature oxidation test, oxidation kinetics curves showed that nanometerzirconium oxide weight was slightly lower than zirconium oxide doped with rare earthmicrons.But the minimum surface crack width the of cerium oxide doped zirconia wasobtained by the microscopic morphology. On high temperature corrosion performance,although the weight was a little bigger than the nano zirconia, the final coating was peeledoff from the substrate. In thermal shock resistance test, regardless of the cooling water or aircooling, zirconium oxide cerium oxide doped micron performance was the most superior andthe phase stability was best. In the nano indentation test, cerium oxide doped zirconia hadhighest hardness and good abrasion resistance under the working temperature, elastic modulusof three coatings was approximate, thermal barrier coating with rare earth was in favor ofstability and can not affect tensile properties of the coating.