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Characterization of thermo-mechanical properties for thermal sprayed NiCoCrAlY coatings

机译：NiCoCrAlY热喷涂涂层的热机械性能表征

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摘要

The thermo-mechanical properties of a thermal barrier bond coat (BC) play an important role in governing the life-time of a coating system. The presented work aims to determine these properties for NiCoCrAlY coatings sprayed on Hastelloy X substrates sprayed under different process conditions. Temperature dependent Young's modulus values are determined for both Atmospheric Plasma Sprayed (APS) and HVOF sprayed coatings using the four-point bending test. Particular attention is paid to microstructure-property relationships during heating. Young's modulus was determined up to 950℃ and evaluated for coatings loaded in both tension and compression. Results are discussed in the context of the effect of feedstock material, process conditions and microstructure characteristics. The methods and results presented are attractive, particularly for the thermal spray industry, since these properties are a prerequisite when the BC is to be considered in component design.
机译：隔热涂层（BC）的热机械性能在控制涂层系统的使用寿命方面起着重要作用。提出的工作旨在确定在不同工艺条件下喷涂在Hastelloy X基材上喷涂的NiCoCrAlY涂层的这些性能。使用四点弯曲试验确定大气等离子喷涂（APS）和HVOF喷涂涂层的温度相关杨氏模量值。特别要注意加热过程中的微观结构-性能关系。杨氏模量可在高达950℃的温度下测定，并评估在拉伸和压缩状态下加载的涂料。在原料的影响，工艺条件和微观结构特征的背景下讨论了结果。提出的方法和结果具有吸引力，特别是对于热喷涂行业而言，因为在组件设计中考虑BC时，这些特性是前提。

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