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首页> 外文期刊>International journal of surface engineering and interdisciplinary materials science >Plasma Sprayed WC-12%Co-Coatings for TBC Applications on Diesel Engine Piston
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Plasma Sprayed WC-12%Co-Coatings for TBC Applications on Diesel Engine Piston

机译：等离子喷涂WC-12％Co涂层，用于柴油发动机活塞的TBC应用

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摘要

In the present study, plasma sprayed WC-12%Co coatings with 100µm NiCrAlY bond coat on a substrate of A336 cast aluminum alloy have been investigated for a thermal barrier coating (TBC) application. The coatings deposited with varying topcoat thickness up to 500µm were deposited on the piston top surface of an Indian hatchback diesel car to act as a thermal barrier and enhance the thermal efficiency of the engine. Although all the specimens with distinct coating overlays survived 350 thermal cycles, the one with 200µm thickness exhibited the best thermal shock behavior as they exuded the most cycles to surface cracks initiation. Moreover, SEM analysis also suggested 200 µm thick coating to be optimal for thermal shock behavior in diesel engine components. The coating phase analysis by XRD and the lattice strain analysis performed by a Williamson-Hall (W-H) analysis did not reveal any structural changes after the thermal shock experiment.
机译：在本研究中，已经研究了在A336铸造铝合金的基材上等离子喷涂WC-12％Co涂层和100μmNiCrAlY粘合涂层的性能，以用于隔热涂层（TBC）。在印度掀背式柴油车的活塞顶表面上沉积厚度变化最大为500μm的涂层，以充当热障并提高发动机的热效率。尽管所有具有明显涂层覆盖的样品均能经受350次热循环，但厚度为200μm的样品却表现出最佳的热冲击性能，因为它们散发了最多的表面裂纹萌生循环。此外，SEM分析还表明200微米厚的涂层对于柴油发动机部件的热冲击性能而言是最佳的。在热冲击实验后，通过XRD进行的涂层相分析和通过Williamson-Hall（W-H）分析进行的晶格应变分析均未发现任何结构变化。

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