MICROSTRUCTURE OF PLASMA-SPRAYEDAl2O3–ZrO2COMPOSITE COATINGS

Lubin Chen, Chuanzhong Chen (), Liang Zhang, Biao Qi and Ting-Quan Lei
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Lubin Chen: School of Materials Science and Engineering, Shandong University, Ji'nan 250061, P. R. China
Chuanzhong Chen: School of Materials Science and Engineering, Shandong University, Ji'nan 250061, P. R. China
Liang Zhang: School of Materials Science and Engineering, Shandong University, Ji'nan 250061, P. R. China
Biao Qi: School of Materials Science and Engineering, Shandong University, Ji'nan 250061, P. R. China
Ting-Quan Lei: School of Materials Science and Engineering, Shandong University, Ji'nan 250061, P. R. China;

Surface Review and Letters (SRL), 2006, vol. 13, issue 05, 545-549

Abstract: Thermal barrier coatings ofAl2O3–ZrO2were prepared by air plasma spraying on the surface of 20G steel. Phase constitution, microstructures and elemental distributions of the coatings were studied by X-ray diffraction, scanning electron microscope and electron probe X-ray microanalysis. The results show that the plasma spray coating mainly consists ofα-Al2O3,c-ZrO2, andt-ZrO2. The bond state of the interface between the top layer and bond layer is fine, and the bond layer has a good combination with the substrate.ZrO2andAl2O3structures can closely integrate together and form compact top layer system.

Keywords: Plasma spraying; thermal barrier coatings; alumina; zirconia–yttria; microstructure (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1142/S0218625X06008475

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