Dynamic Failure of Alumina-magnesia Castables Modified by Nano-additives Under Uniaxial Compressive Load

doi:10.19691/j.cnki.1004-4493.2025.01.004

China's Refractories ›› 2025, Vol. 34 ›› Issue (1): 25-33.DOI: 10.19691/j.cnki.1004-4493.2025.01.004

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Dynamic Failure of Alumina-magnesia Castables Modified by Nano-additives Under Uniaxial Compressive Load

ZHU Haixia¹, DAI Yajie^{1, 2, 3*}, FU Zhenjingwen¹, WANG Zexian¹, LIAO Ning^{1, 2, 3}, LI Yawei^{1, 2, 3}

1 The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
2 National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan 430081, China
3 Joint International Research Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China

Online:2025-03-15 Published:2025-03-27
Contact: *e-mail: yajie.dai@wust.edu.cn
About author:Zhu Haixia, a postgraduate student of Materials and Chemical Engineering at Wuhan University of Science and Technology, is engaged in the development of high-performance alumina-magnesia refractory castables and research on their thermal-mechanical damage behavior. At present, she has published two SCI peer-reviewed papers.

Abstract

Abstract: High-performance alumina-magnesia castables were developed with the addition of nano-CaCO₃ and nano-hydromagnesite. To further understand their dynamic failure mechanism, the quantitative investigation via the employment of the Split-Hopkinson pressure bar (SHPB) method was adopted to test the dynamic failure behavior of alumina-magnesia castables under various impact velocities. The results demonstrate that the greater the impact velocity, the more intense the sample damage. The dynamic compressive stress, the ultimate strain, and the strain energy of all samples display a strain rate hardening effect, and this phenomenon is more conspicuous in the samples incorporating nano-additives. The nano-additives show a positive influence on the dynamic mechanical properties of the castables.

Key words: alumina-magnesia castables, dynamic failure, nano-additives, SHPB, strain rate hardening effect

ZHU Haixia, DAI Yajie, FU Zhenjingwen, WANG Zexian, LIAO Ning, LI Yawei. Dynamic Failure of Alumina-magnesia Castables Modified by Nano-additives Under Uniaxial Compressive Load[J]. China's Refractories, 2025, 34(1): 25-33.

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Dynamic Failure of Alumina-magnesia Castables Modified by Nano-additives Under Uniaxial Compressive Load

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