About properties of ZrO2 thermal protective coatings obtained from spherical powder mixtures

13th International Conference on Films and Coatings

Berdnik, O.B.^1 ; Tsareva, I.N.^1 ; Tarasenko, Yu.P.^1

Institute for Problems in Mechanical Engineering, Russian Academy of Sciences (IPME RAS), Nizhny Novgorod

603024, Russia^1

关键词: Heat resistant coatings;    High energy plasmas;    Intermetallic phase;    Layered microstructure;    Roughness parameters;    Spherical powders;    Thermal protective coatings;    Zirconium dioxide;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/857/1/012004/pdf
DOI  :  10.1088/1742-6596/857/1/012004

来源: IOP

【 摘 要 】

It is developed the technology of high-energy plasma spraying of the zirconium dioxide (ZrO2) thermal protective coating on the basis of ZrO2tetragonal and cubic phases with the spheroidal grain shape and the columnar substructure, with the total porosity P = 4 %, the hardness HV = 12 GPa, the roughness parameter Ra∼ 6 μm, the thickness 0.3-3 mm. As a sublayer it is used the heat-resistant coating of "Ni-Co-Cr-Al-Y" system with an intermetallic phase composition and the layered microstructure of the grains.