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首页> 外文期刊>Surface & Coatings Technology >Thermal fatigue behavior of thermal barrier coatings with the MCrAlY bond coats by cold spraying and low-pressure plasma spraying
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Thermal fatigue behavior of thermal barrier coatings with the MCrAlY bond coats by cold spraying and low-pressure plasma spraying

机译：MCrAlY粘结涂层的冷喷涂和低压等离子喷涂的热障涂层的热疲劳行为

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摘要

The thermal fatigue behavior of thermal barrier coatings (TBCs) with the NiCoCrAlTaY bond coats deposited by cold spraying and low-pressure plasma spraying (LPPS) was examined through thermal cyclic test. The TBCs were subjected to the pre-oxidation before the test in an Ar atmosphere. The results show that a more uniform TGO in both thickness and composition forms on the cold-sprayed bond coat than that deposited by LPPS. The TBCs with the cold-sprayed bond coat exhibit a longer thermal cyclic lifetime than that with the LPPS bond coat. The differences in oxidation behavior and thermal cyclic behavior between two TBCs were discussed based on the evident difference in the surface morphology of two MCrAlY bond coats deposited by cold spraying and LPPS.
机译：通过热循环试验研究了具有冷喷涂和低压等离子喷涂（LPPS）沉积的NiCoCrAlTaY粘结涂层的隔热涂层（TBC）的热疲劳行为。在Ar气氛中进行测试之前，对TBC进行预氧化。结果表明，与LPPS沉积相比，在冷喷涂粘结涂层上形成的TGO的厚度和成分均更均匀。冷喷涂粘结涂层的TBC的热循环寿命比LPPS粘结涂层的TBC更长。基于冷喷涂和LPPS沉积的两种MCrAlY粘结涂层的表面形貌差异，讨论了两种TBC之间的氧化行为和热循环行为的差异。

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