Performance of air plasma spraying parameters in the fabrication of ZrO2_10%Y2O3_18% TiO2 thermal barrier coatings

2nd International Meeting for Researchers in Materials and Plasma Technology

物理学;材料科学

Liscano, S.^1 ; Gil, L.^1

Departamento de Ingeniería Metalúrgica, Universidad Nacional Experimental Politécnica Antonio José de Sucre, Puerto Ordaz, Venezuela^1

关键词: Air plasma spraying;    Arc current;    Factorial design;    Powder feed rate;    Spraying parameters;    Thermal barrier coating (TBCs);    Vickers indentation;    X-ray microanalysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/466/1/012008/pdf
DOI  :  10.1088/1742-6596/466/1/012008

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this research, ZrO2-10%Y2O3-18% TiO2 thermal barrier coatings (TBCs) were sprayed by employing an air plasma thermal spray (APS) technique following a 23 factorial design experiment in order to obtain the best favorable spraying conditions able to enhance their properties. The effect of the spraying parameters on the porosity, microhardness, microstructure and morphology were determined by using different techniques such as optical microscopy (OP), image analysis, Vickers indentation and scanning electron microscopy (SEM) technique, this latter coupled with X-Ray microanalysis (EDS). It was found that both the arc voltage and the powder feed rate, as well as their interaction had a significant effect on the values of the reported hardness and these results were related to the existing level of porosity in the coatings. It was concluded that the best coatings properties, for the level of the variables studied in this work, could be obtained if the arc voltage is maintained at 36 V, the arc current at 900 A and the powder feed rate to 24 g/min.