Study on graphite surface modification by non-electrode plasma electrolysis

A novel non-electrode plasma electrolysis technique was developed in the paper in order to rapidly prepare a coating on graphite. The coating was mainly composed of SiO2 with the thickness of ~ 7 µm. A small amount of SiC was also detected in the coating. The coating exhibited superior oxidation res...

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Bibliographic Details
Published in:Ceramics international 2018-11, Vol.44 (16), p.19427-19433
Main Authors: Zhang, Yongfu, Bu, Aiming, Chen, Weiwei, Cheng, Huanwu, Wang, Lu
Format: Article
Language:English
Subjects:
Graphite coating
Non-electrode plasma electrolysis
SiO2/SiC
Surface modification
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Summary:A novel non-electrode plasma electrolysis technique was developed in the paper in order to rapidly prepare a coating on graphite. The coating was mainly composed of SiO2 with the thickness of ~ 7 µm. A small amount of SiC was also detected in the coating. The coating exhibited superior oxidation resistance at 1000 °C in air, evidenced by the visible polishing marks, smooth surface and the much decreased roughness from ~ 120 µm to ~ 50 µm. The simulation of thermal effects was conducted in order to establish the formation mechanism of the coating on graphite. We believe that the novel non-electrode plasma electrolysis technique will find a wide range of applications in preparing high-performance graphite and its composites.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2018.07.179