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首页> 外文会议>International Conference on Powder Metallurgy Particulate Materials >Effect of bond coat species made by HVOF and APS on Thermal behavior of EB-PVD thermal barrier coatings in cyclic thermal exposure
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Effect of bond coat species made by HVOF and APS on Thermal behavior of EB-PVD thermal barrier coatings in cyclic thermal exposure

机译：HVOF制备的粘合涂层物种的影响及APS对循环热曝光中EB-PVD热阻挡涂层热行为的影响

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Presented research is aimed to develop a Finite Element (FE) model of Thermal Barrier Coating (TBCs) systems in order to corelate the delamination behavior of TBCs observed in Cyclic Furnace Thermal Fatigue test (CFTF), by Finite Element Analysis (FEA) based simulation. Particularly, the effect of bond coat species made by two different process: air-plasma spray (APS) and high velocity oxygen fuel (HVOF), on the durability of TBCs is evaluated by physical test. In the CFTF test, the TBCs with bond coats prepared by the APS and HVOF methods were delaminated in the range of 100-380 and 210-390 cycles, respectively. The cyclic thermal exposure tests indicated that TBC systems with bond coat prepared by HVOF has better thermal durability compared to APS. Therefore. based on the specimen geometry a 2-dimensional axisymmetric FE model is developed and a transient thermal analysis is performed based on thermal boundary conditions and cycle timings of CFTF test. FEA simulation also predicted higher equivalent stress at the interface of Yttria Stabilized Zirconia (YSZ) top coat and NiCrCoAlY bond coat interface in TBCs prepared by APS process compared to HVOF. Hence the FE model is validated.
机译：提出研究的目标是开发系统的热障涂层（热障涂层）有限元（FE）模式，以corelate在循环炉热疲劳试验（CFTF）观察到热障涂层的分层特性，通过有限元分析（FEA）的模拟。特别地，粘结涂层物质的影响由两种不同的过程：空气等离子喷涂（APS）和高速氧燃料（HVOF），热障涂层上的耐久性是通过物理试验来评价。在CFTF测试，由APS和HVOF方法制备粘结涂层的热障涂层被在100-380和210-390次循环的范围内分别剥离。环状热暴露试验表明，与粘结涂层TBC体系制备的相比，由APS HVOF具有更好的热耐久性。所以。基于所述试样的几何形状的2维轴对称有限元模型的开发和瞬态热分析基于热边界条件和CFTF试验的循环的定时执行的。 FEA模拟也在氧化钇的界面预测后的较高当量应力稳定的氧化锆（YSZ）顶涂层和NiCrCoAlY粘结涂层界面相比HVOF由APS方法制备热障涂层。因此，有限元模型进行了验证。

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