Effect of molten NaCl on the wet oxidation behavior of Al2O3-modified SiC-B4C ceramics at 1300 ℃

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-03-26 DOI:10.1016/j.jeurceramsoc.2025.117396

Qingliang Shan , Ziluo Lin , Hongbin Zhang , Xiao You , Xiangkun Tian , Rui Li , Junjie Qian , Hao Qin

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Abstract

In this study, the oxidation properties of Al₂O₃-modified SiC-B₄C ceramics are examined at 1300 ℃ in different atmospheres. The results indicate that an appropriate amount of Al₂O₃ can repair the glass phase network structure and increase the viscosity of the borosilicate glass phase. This, in turn, inhibits the crystallization of SiO₂ and the volatilization of B₂O₃. However, excessive Al₂O₃ can damage the network structure of the borosilicate glass phase, leading to a decrease in its viscosity. Al₂O₃ modification results in reduction of 48.6 % and 55.3 % in oxidized layer thickness after oxidation for 100 h under wet-oxygen and wet-oxygen-NaCl atmosphere, respectively. In addition, Na₂O is found to be the primary factor accelerating the oxidation of B₄C-SiC in wet-oxygen-NaCl atmosphere. Under both oxidation conditions, the optimal content of Al₂O₃ is found to be 15 wt%.

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.