Effect of plasma spray distance on the features and hardness reliability of YSZ thermal barrier coating

被引：19

作者：

Abbas, Ruqaya A. ^{[1
]}

Ajeel, Sami A. ^{[1
]}

Bash, Maryam A. Ali ^{[1
]}

Kadhim, Mohammed J. ^{[1
]}

机构：

[1] Univ Technol Baghdad, Dept Prod Engn & Met, Baghdad 10066, Iraq

来源：

MATERIALS TODAY-PROCEEDINGS | 2021年 / 42卷

关键词：

Yttria stabilized zirconia; Plasma sprayed coating; Porosity; Hardness; Weibull's modulus; MECHANICAL-PROPERTIES; PARAMETERS; POROSITY; MICROSTRUCTURE; PROPERTY;

D O I：

10.1016/j.matpr.2020.12.578

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper hardness reliability and porosity features of plasma sprayed yttria-stabilized zirconia (YSZ) thermal barrier coatings (TBCs) as a function of variable spray distance parameter have been investigated. Microstructures details that include porosity and crack densities were studied using Field Emission Scanning Electron Microscopy (FESEM). Morphology and surface roughness were investigated through AFM analysis and central line average (CLA). Phases and chemical composition of the coating were characterized using XRD and EDS analysis. The distributions of plasma sprayed coatings hardness are highly scattered. The Weibull's distribution was the best approach to describe the plasma sprayed coating hardness. The results indicated that the cohesion between splats mainly controls by the spray distance. By increasing the spray distance from 70 mm to 130 mm; the amount of surface roughness increased due to non-melted or insufficient melted of particles powder. Among the studied samples; the coating at spray distance 100 mm exhibited desirable microstructure and microhardness values. (C) 2021 Elsevier Ltd. All rights reserved.

引用

页码：2553 / 2560

页数：8

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