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Coatings 2019, 9(3), 167; https://doi.org/10.3390/coatings9030167

Influence of Silicon-Modified Al Powders (SiO2@Al) on Anti-oxidation Performance of Al2O3-SiO2 Ceramic Coating for Carbon Steel at High Temperature

1
State Key Laboratory of Multiphase Complex System, Institute of Process Engineering, Chinese Academy of Sciences, PO Box 353, Beijing 100190, China
2
Department of Chemical Engineering, University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Beijing 100049, China
3
China ENFI Engineering Corporation, No. 12 Fuxing Road, Beijing 100038, China
4
Department of Textile and Material Engineering, Dalian Polytechnic University, No. 1 Light Industry Court, Ganjingzi District, Dalian 116034, China
*
Author to whom correspondence should be addressed.
Received: 24 January 2019 / Revised: 22 February 2019 / Accepted: 26 February 2019 / Published: 4 March 2019
(This article belongs to the Special Issue Functional Ceramic Coatings)
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Abstract

In this paper, silicon-modified Al powders (SiO2@Al) were prepared by tetraethyl orthosilicate (TEOS) hydrolysis under alkaline conditions. Using SiO2@Al as additives, a new Al2O3-SiO2 ceramic coating (ASMA) was formed on carbon steel to prevent carbon steel from oxidization at 1250 °C for 120 min. Compared with the Al2O3-SiO2 ceramic coating without additive (AS), ASMA showed a remarkably better anti-oxidation performance, especially during the temperature-rise period. According to the characterization conducted by TG-DTA, XRD and SEM-EDS, it was found that the metallic Al in ASMA melted at 660 °C and reacted with SiO2 on its surface, which generated local high temperature and accelerated the sintering of ceramic raw materials. The mullite and hercynite formed in ASMA also played a major role for enhancing the anti-oxidation performance of ceramic coating. View Full-Text
Keywords: ceramic coating; anti-oxidation; SiO2@Al additive; carbon steel ceramic coating; anti-oxidation; SiO2@Al additive; carbon steel
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Yu, B.; Fu, G.; Cui, Y.; Zhang, X.; Tu, Y.; Du, Y.; Zuo, G.; Ye, S.; Wei, L. Influence of Silicon-Modified Al Powders (SiO2@Al) on Anti-oxidation Performance of Al2O3-SiO2 Ceramic Coating for Carbon Steel at High Temperature. Coatings 2019, 9, 167.

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