功能梯度热障涂层隔热与应力缓和的组合设计

Integration Design of Heat Insulation and Stress Relaxation for FGM Thermal Barrier Coatings

提出了功能梯度热障涂层隔热与应力缓和的组合设计思想,给出了材料基本物性参数物理模型,并在此基础上首先由隔热能力确定不同层数对应的成分分布指数,继而进一步计算出与之匹配的轴向及径向应力分布情况,最后结合涂层材料的制备成本,确定了满足组合设计准则的涂层结构。

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 criterious of the integration design were worked out in combination with the fabrication cost of coating materials