Effect of the microstructure of suspension plasma-sprayed thermal barrier coatings on their thermal cycling damage
Effect of the microstructure of suspension plasma-sprayed thermal barrier coatings on their thermal cycling damage
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DOI：
10.1016/j.surfcoat.2023.129269
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发表时间：
2023-01
影响因子：
5.4
通讯作者：
Y. Yamazaki;Keisuke Shinomiya;Tatsuya Hamaguchi;Y. Habu;Kai Takagi
中科院分区：
文献类型：
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作者：
Y. Yamazaki;Keisuke Shinomiya;Tatsuya Hamaguchi;Y. Habu;Kai Takagi
悬浮等离子喷涂（SPS）技术最近引起了人们的注意，由于各种各样的微观结构可实现使用亚微米喷雾颗粒与溶剂混合，以形成悬浮液。利用SPS技术可以制备出具有柱状结构的热障涂层。由于其独特的柱状组织实现了高应变容限，使用该技术喷涂的顶部涂层可以有效地抑制SPS-TBCs的热循环损伤。然而，关于显微结构对柱状结构SPS热障涂层损伤行为的影响的研究却很少。研究了表面涂层组织对SPS热障涂层热循环疲劳性能的影响。SPS-TBC顶涂层中，顶涂层-粘结层界面上形成的复合氧化物的尺寸和界面处裂纹（热循环形成的）的长度随着柱直径的增加而增加。热喷涂条件影响SPS热障涂层的热循环疲劳寿命。具有细小柱状结构的SPS-TBC具有上级的热循环疲劳寿命。
The suspension plasma spray (SPS) technique has recently attracted attention due to the variety of microstructures achievable using submicron spray particles mixed with a solvent to form a suspension. Thermal barrier coatings (TBCs) with a columnar microstructure can be obtained using SPS. Because of its unique columnar microstructure achieving high strain tolerance, a top coat sprayed using this technique can efficiently suppress thermal cycling damage in SPS–TBCs. However, there are few reports on the effect of microstructure on the damage behavior of SPS–TBCs with a columnar structure. In this study, the effect of the top coat microstructure on the thermal cycling fatigue of SPS–TBCs was investigated. The size of the complex oxide formed on the top coat–bond coat interface and the length of the cracks at the interface (formed as a result of thermal cycling) increase with the column diameter in the top coat of SPS–TBCs. The thermal spray conditions affect the thermal cycling fatigue life of SPS–TBCs. The SPS–TBC with fine columnar structure exhibits superior thermal cycling fatigue life.