Integration design of heat insulation and stress relaxation for FGM thermal barrier coatings

The idea of the integration design of heat insulation and stress relaxation for FGM thermal barrier coating was suggested, and a physical model of basic parameters of material properties was given in the present paper. First, the composition gradient exponents for different layer numbers were designed according to the heat insulation requirement; then the axial and radial stress distributions matching with the above mentioned exponents were calculated, and finally, the coating structures which meet the criterions of the integration design were worked out in combination with the fabrication cost of coating materials.