Study on Microstructure of Nano-Zirconia Coating by Atmospheric Plasma Spraying

Author:

Chang Ying1,Zhu Qin Biao1,Dong Shi Jie1,Wang Hui Hu1,Du Kuan He1

Affiliation:

1. Hubei University of Technology

Abstract

On the basis of successfully preparing nanozirconia coating via reasonable spraying technical parameters, the cross section and surface morphology of coating were determined by scan electron microscopy (SEM), and the ceramic particle sizes of coating were determined by transmission electron microscopy (TEM). Experimental results indicate that plasma sprayed zirconia coating possesses typical layer structure of thermal spray coating, in which columnar grains pile up together. Meanwhile, the non-molten nanopowders coexist with the layer structure. In addition, the equiaxial grains exist in the zirconia coating according to TEM, but the grain size is not uniform.

Publisher

Trans Tech Publications, Ltd.

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