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采用有限单元法研究了金属粘结层厚度、热生长氧化层厚度及陶瓷层厚度对Sm2Zr2O7/8YSZ双陶瓷层热障涂层残余热应力的影响。结果表明,金属粘结层厚度为0.1mm时,涂层径向应力最小。涂层径向应力随热生长氧化层的厚度的增加而减小。当YSZ厚度在0.1～0.5mm之间时,径向热应力随YSZ厚度增加而增大,超过0.5mm后应力基本不再变化。陶瓷层最佳厚度组合是0.1mmYSZ+0.9mmSm2Zr2O7。
Finite element method was used to study the effects of the thickness of the metal bonding layer, the thickness of the thermally grown oxide layer and the thickness of the ceramic layer on the residual thermal stress of the thermal barrier coatings of Sm2Zr2O7 / 8YSZ dual-layer ceramic coatings. The results show that the thickness of the metal adhesive layer 0.1mm, the coating radial stress minimum. The radial stress decreases with the increase of the thickness of the thermally grown oxide layer. When the thickness of YSZ is between 0.1 ~ 0.5mm, the radial thermal stress increases with the increase of YSZ thickness, and the stress will not change after exceeding 0.5mm. The best combination of ceramic thickness is 0.1mmYSZ + 0.9mmSm2Zr2O7.