论文部分内容阅读
研究了ZrO2／Ni阶梯热障涂层在火焰喷烧和水淬两种热冲击条件下的失效行为，建立了梯度热障涂层在火焰喷烧和水淬热冲击条件下一维温度场和应力场的解析模型实验结果表明，涂层的抗热冲击能力在火焰喷烧条件下随层次的增加而增强，在水淬热冲击条件下却随层次的增加而降低．证实涂层的抗热冲击能力与热冲击条件有关，并取决于表面换热系数的大小与方向故评价涂层的抗热冲击能力时须合理选择热冲击条件按梯度设计，能大大提高航空发动机叶片及相当热冲击条件使用的热障涂层的抗热冲击能力.
The failure behavior of ZrO2 / Ni ladder thermal barrier coatings under flame and water quenching was studied. One-dimensional temperature field of the gradient thermal barrier coating under flame and water quenching and thermal shock conditions Analytical model of stress field Experimental results show that the thermal shock resistance of the coating increases with the increase of the layer thickness under the condition of flame spraying and decreases with the increase of the layer thickness under the condition of water quenching and thermal shock. It is confirmed that the thermal shock resistance of the coating is related to the thermal shock conditions and depends on the size and direction of the surface heat transfer coefficient. Therefore, it is necessary to choose the thermal shock conditions according to the gradient design when evaluating the thermal shock resistance of the coating, which can greatly enhance the aeroengine Thermal shock resistance of thermal barrier coatings for blades and fairly thermal shock conditions.