Comparative study of suspension plasma sprayed and suspension high velocity oxy-fuel sprayed YSZ thermal barrier coatings
Comparative study of suspension plasma sprayed and suspension high velocity oxy-fuel sprayed YSZ thermal barrier coatings
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DOI：
10.1016/j.surfcoat.2014.11.054
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发表时间：
2015-04-25
影响因子：
5.4
通讯作者：
Toma, Filofteia-Laura
中科院分区：
文献类型：
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作者：
Ganvir, Ashish;Curry, Nicholas;Toma, Filofteia-Laura
悬浮热喷涂是一种较新的热喷涂技术，用于生产高级热障涂层。这种技术能够生产出与使用固体粉末作为原料的传统热喷涂相比性能大不相同的热障涂层。在这项工作中，对四种不同类型的热障涂层进行了比较研究，采用两种不同的热喷涂工艺，悬浮高速氧燃料喷涂（SHVOF）和悬浮等离子喷涂（SPS），使用两种不同的水基悬浮液。进行的测试包括使用扫描电镜进行微观结构分析，使用水渗透的重量差进行孔隙度分析，使用激光闪光分析进行导热系数测量，以及使用热循环疲劳测试进行寿命评估。结果表明，SPS涂层多孔性强，导热系数低于相同悬浮液制备的SHVOF涂层。热循环试验表明，SPS涂层比SHVOF涂层具有更高的使用寿命。(C) 2014 Elsevier B.V.版权所有
Suspension Thermal Spraying is a relatively new thermal spaying technique to produce advanced thermal barrier coatings. This technique enables the production of much different performance thermal barrier coatings than conventional thermal spraying which uses solid powder as a feedstock material. In this work a comparative study is performed on four different types of thermal barrier coatings sprayed with two different thermal spay processes, suspension high velocity oxy-fuel spraying (SHVOF) and suspension plasma spraying (SPS) using two different water-based suspensions. Tests carried out include microstructural analysis with SEM, porosity analysis using weight difference by water infiltration, thermal conductivity measurements using laser flash analysis and lifetime assessment using thermo-cyclic fatigue tests. The results showed that SPS coatings were much porous and hence showed lower thermal conductivity than SHVOF coatings produced with the same suspension. From the thermo-cycling tests it was observed that the SPS coatings showed a higher lifetime than the SHVOF ones. (C) 2014 Elsevier B.V. All rights reserved.