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首页> 外文期刊>Journal of Materials Science >Deposition of thermal barrier coatings using the solution precursor plasma spray process
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Deposition of thermal barrier coatings using the solution precursor plasma spray process

机译：使用溶液前驱体等离子喷涂工艺沉积热障涂层

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摘要

The solution-precursor plasma-spray ( SPPS) process is capable of producing highly durable thermal barrier coatings. In an effort to improve the understanding of the deposition mechanisms in this novel process, a series of specific experiments, where the substrate is held stationary and the plasma torch is programmed to scan a single pass across the substrate, were conducted and the resulting deposits were carefully characterized. In addition to the deposition mechanisms identified previously in the stationary torch experiments, the deposition mechanisms of two other types of deposits, thin film and fine spherical particles, were identified in this study. The melting of inflight formed 7YSZ particles and their rapid solidification to form ultra-fine splats on the substrate was found to be the dominant deposition mechanism. The characterization of actual SPPS coatings confirmed that the various coating-deposition mechanisms identified in the model experiments occur in concert during the actual coating process. Adherent deposits (ultra-fine splats, deposits from gel-like precursor and film formed via chemical vapor deposition), unmelted particles ( spherical particles, deposits from non-decomposed precursor) and porosity were estimated to constitute similar to65, similar to19 and similar to16 vol%, of the coating, respectively. (C) 2004 Kluwer Academic Publishers. [References: 22]
机译：溶液前体等离子体喷涂（SPPS）工艺能够生产高度耐用的热障涂层。为了提高对这种新颖工艺中沉积机理的理解，进行了一系列具体实验，其中将基板保持静止，将等离子炬编程为扫描穿过基板的单次扫描，然后对所得沉积物进行处理。精心表征。除了先前在固定式割炬实验中确定的沉积机理外，本研究还确定了另外两种沉积物（薄膜和细球形颗粒）的沉积机理。发现机上形成的7YSZ粒子的熔化及其快速固化以在基材上形成超细小片是主要的沉积机理。实际SPPS涂层的特性证实，模型实验中确定的各种涂层沉积机理在实际涂层过程中会同时发生。估计附着的沉积物（超细碎片，凝胶状前体的沉积物和通过化学气相沉积形成的膜），未熔化的颗粒（球形颗粒，未分解的前体的沉积物）和孔隙率近似于65，近似于19和近似于16分别为涂料的vol％。 （C）2004 Kluwer学术出版社。 [参考：22]

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