Synthesis of CA<sub>6</sub>/AlON composite with enhanced slag resistance

Yunsong Liu; Enhui Wang; Linchao Xu; Tao Yang; Zhijun He; Tongxiang Liang; Xinmei Hou

doi:10.1007/s12613-022-2435-2

Volume 30 Issue 4

Apr. 2023

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2023 > 30(4): 756-765

Yunsong Liu, Enhui Wang, Linchao Xu, Tao Yang, Zhijun He, Tongxiang Liang, and Xinmei Hou, Synthesis of CA₆/AlON composite with enhanced slag resistance, Int. J. Miner. Metall. Mater., 30(2023), No. 4, pp. 756-765. https://doi.org/10.1007/s12613-022-2435-2

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Yunsong Liu, Enhui Wang, Linchao Xu, Tao Yang, Zhijun He, Tongxiang Liang, and Xinmei Hou, Synthesis of CA6/AlON composite with enhanced slag resistance, Int. J. Miner. Metall. Mater., 30(2023), No. 4, pp. 756-765. https://doi.org/10.1007/s12613-022-2435-2

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Research Article

Synthesis of CA₆/AlON composite with enhanced slag resistance

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Corresponding authors:
Enhui Wang E-mail: houxinmeiustb@ustb.edu.cn

Xinmei Hou E-mail: wangenhui@ustb.edu.cn
Received: 20 October 2021; Revised: 9 February 2022; Accepted: 11 February 2022; Available online: 12 February 2022

Abstract

Abstract

Different amounts of AlON have been introduced in calcium hexaaluminate (CA₆) using two approaches, that is, one-step and two-step methods, to improve the slag resistance of CA₆. A one-step method can directly sinter the mixtures combining Al₂O₃, CaCO₃, and Al in flowing nitrogen, in which AlON clusters are always formed because of the poor wettability of Al by Al₂O₃, leading to the high porosity of CA₆/AlON composite. In a two-step method, CA₆ and AlON are prepared separately and then mixed and sintered in flowing nitrogen. Compared with the sample prepared by the one-step method, CA₆ and AlON in composite by the two-step method are more uniformly distributed, and the optimized amount of AlON added is 10wt%. The slag corrosion and penetration test shows that the CA₆/AlON composite using the two-step method exhibits superior slag corrosion protection. The promoted effect of AlON on slag penetration and corrosion resistance is also discussed.
- CA₆/AlON composite;
- two-step method;
- wettability;
- slag resistance

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