期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 36, 期 4, 页码 1081-1089出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2015.11.018
关键词
Suspension plasma spray coatings; Microstructure formation mechanism; Columnar structure; Yttria-stabilized zirconia polycrystal; Thermal barrier coatings (TBCs)
Suspension plasma spraying (SPS) is used to perform enhanced YSZ coating with columnar microstructure for thermal barrier coating (TBC) applications. By combination of plasma flow, substrate preparation, suspension formulation and injection or coating kinematic management it is possible to tune SPS coating structure from widely-separated columns to a significantly more compact columnar structure. Among these parameters, substrate roughness control, combined with an adapted coating growth velocity, are identified as the most relevant. An analytical approach is presented to describe columns growth based on coating image analysis. It allows to give the expression of the lateral and normal growth speeds responsible of the columnar structure. (C) 2015 Elsevier Ltd. All rights reserved.
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