Effect of Zirconia Corundum Addition on Structure and Properties of Al2O3-SiC-C Materials

doi:10.19691/j.cnki.1004-4493.2026.02.005

China's Refractories ›› 2026, Vol. 35 ›› Issue (2): 23-27.DOI: 10.19691/j.cnki.1004-4493.2026.02.005

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Effect of Zirconia Corundum Addition on Structure and Properties of Al₂O₃-SiC-C Materials

CHEN Wendan¹, DU Juan², LI Wenfeng², GUO Huishi^1,*, SHEN Tianzi², SHI Kai², CAO Jun²

1 School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450051, China;
2 School of Materials Science and Engineering, Henan University of Technology, Zhengzhou 450001, China

Online:2026-06-15 Published:2026-09-29
Contact: ^*e-mail: guohuishi@zzuli.edu.cn
About author:Chen Wendan, born in 2003, graduated from Zhengzhou University of Light Industry with a bachelor’s degree in Computer Science and Technology in 2025. She is studying for her master’s degree in Zhengzhou University of Light Industry. She mainly engages in the research of refractories and high temperature ceramics.

Abstract

Abstract: Al₂O₃-SiC-C materials were prepared using recycled corundum (1-3 and 3-5 mm), white fused corundum (≤1 mm), α-Al₂O₃ micropowder (≤10 μm), flake graphite (≤50 μm) and silicon carbide (≤1 mm) as main starting materials, silicon powder (≤74 μm) as the antioxidant, and thermosetting phenolic resin with a carbon residue of about 45% as the binder. The effects of the zirconia corundum (AZ40, ≤74 μm) addition (0, 3%, 6%, 9%, and 12%, by mass) on the structure and properties of the Al₂O₃-SiC-C materials were investigated. The fracture morphology of the samples after heat treatment was observed using a field emission scanning electron microscope, and the structure was analyzed. The results show that: (1) with the increase of the AZ40 addition, the bulk density, cold modulus of rupture, cold compressive strength, hot modulus of rupture, and the retention ratio of the cold modulus of rupture of the samples all increase first and then decrease, while the apparent porosity and oxidation index change in reverse; (2) with the AZ40 addition increasing to 12%, the sample performs poorer mechanical and antioxidant properties than the one without AZ40, indicating that an appropriate AZ40 addition is beneficial to improving the mechanical properties, thermal shock resistance and oxidation resistance of the Al₂O₃-SiC-C materials; (3) the sample with 3% AZ40 exhibits the best comprehensive performance.

Key words: zirconia corundum, Al₂O₃-SiC-C, strength, thermal shock resistance, oxidation resistance, microstructure

CHEN Wendan, DU Juan, LI Wenfeng, GUO Huishi, SHEN Tianzi, SHI Kai, CAO Jun. Effect of Zirconia Corundum Addition on Structure and Properties of Al₂O₃-SiC-C Materials[J]. China's Refractories, 2026, 35(2): 23-27.

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Effect of Zirconia Corundum Addition on Structure and Properties of Al₂O₃-SiC-C Materials

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