Influence of TiO2 and ZrO2 Nano Particles Addition in Al2O3 Base Coating Using Plasma Spraying

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The additive (3wt%) nano-particles of anatase-TiO2 and monoclinic-ZrO2 were prepared using ball-milling method to form Al2O3/3wt%TiO2 and Al2O3/3wt%ZrO2 nanocomposite powders. The incorporation of nano-particles can significantly enhance the microstructure and mechanic properties of Al2O3-base coating. The phase of microstructure coating was present mostly of γ-Al2O3 and α-Al2O3 phases, while anatase-TiO2 was transformed to rutile-TiO2 and monoclinic-ZrO2 was changed to tetragonal-ZrO2 due to such high temperature of plasma plume. SEM microstructures of the coatings mainly displayed a lamellar structure of Al2O3 with interlarmellar pores and well dispersed splats of TiO2 and ZrO2 phases. The Al2O3/3wt%ZrO2 presented the lowest value of friction coefficient and sliding wear rate. It was found that the plasma-sprayed composite coating possessed better wear resistance than that of monolithic Al2O3 coating. The addition of nano-particles was found to improve friction coefficient and sliding wear resistance.

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Periodical:

Edited by:

Wu Fan

Pages:

1849-1854

DOI:

10.4028/www.scientific.net/AMM.110-116.1849

Citation:

N. Dejang and S. Jiansirisomboon, "Influence of TiO2 and ZrO2 Nano Particles Addition in Al2O3 Base Coating Using Plasma Spraying", Applied Mechanics and Materials, Vols. 110-116, pp. 1849-1854, 2012

Online since:

October 2011

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$35.00

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