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Open AccessArticle

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

State Key Laboratory of Multiphase Complex System, Institute of Process Engineering, Chinese Academy of Sciences, PO Box 353, Beijing 100190, China
Department of Chemical Engineering, University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Beijing 100049, China
China ENFI Engineering Corporation, No. 12 Fuxing Road, Beijing 100038, China
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.
Coatings 2019, 9(3), 167;
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)
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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MDPI and ACS Style

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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