Preparation and Characterization of Al2O3/ZrO2-MgO-CeO2 Composite Coatings Prepared by Flame Spraying

Abstract:

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In the present work, ultra-fine Al2O3/ZrO2-MgO-CeO2 powders were used as the starting materials to produce Al2O3-ZrO2 composite coatings on 45# carbon steel by flame spray. The ultra-fine Al2O3/ZrO2-MgO-CeO2 powders were prepared via the co-precipitation method accompanied a crushing sintering process. The microstructure, the phase compositions and the bond strength of the crushed sintered powders and the corresponding composite coatings were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD) and a tensile bond strength tests respectively. It was found that the phase composition, the surface topography and the coating adhesion were different from the difference kinds of coatings. Results indicated that the phase composition of the flame sprayed ceramic coatings consisted of tetragonal-ZrO2, cubic-ZrO2, ZTA (zirconia toughened alumina) and γ-Al2O3, with a small amount of α-Al2O3, and that bond strength values attained 45.1 MPa for 42.6wt.% Al2O3/57.4wt.% Mg0.13Ce0.1Zr0.77O1.87 coating.

Info:

Periodical:

Advanced Materials Research (Volumes 189-193)

Edited by:

Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang

Pages:

410-415

DOI:

10.4028/www.scientific.net/AMR.189-193.410

Citation:

W. G. Zhao et al., "Preparation and Characterization of Al2O3/ZrO2-MgO-CeO2 Composite Coatings Prepared by Flame Spraying", Advanced Materials Research, Vols. 189-193, pp. 410-415, 2011

Online since:

February 2011

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Price:

$35.00

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