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Structural Evolution of Cr2AlB2 Powder and Its Effect on Properties in Al2O3-C Refractories at High Temperature
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Yang ZHANG, Yawei LI, Ning LIAO, Gengfu LIU, Zixu JI
Journal of the Chinese Ceramic Society | 2023, 51(3) : 579 - 588
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Journal of the Chinese Ceramic Society | 2023, 51(3): 579-588
• Research Articles •
Structural Evolution of Cr2AlB2 Powder and Its Effect on Properties in Al2O3-C Refractories at High Temperature
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Yang ZHANG, Yawei LI, Ning LIAO, Gengfu LIU, Zixu JI
Affiliations
  • The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, China; National-Provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan 430081, China

    • ZHANG Yang (1999-), male, Master candidate. E-mail:

About Author:

ZHANG Yang (1999-), male, Master candidate. E-mail:

Published: 2023-03-20 doi: 10.14062/j.issn.0454-5648.20221010
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Al2O3-C refractories are important for the continuous casting process. It is essential for safe and effective steel making processes to enhance the strength and oxidation resistance of Al2O3-C refractories. A compound MAB phase Cr2AlB2 has attracted recent attention due to its high fracture toughness, high damage tolerance and excellent oxidation resistance. In this work, a ternary layered compound Cr2AlB2 was introduced into the Al2O3-C refractories. The structural evolution of Cr2AlB2 in Al2O3-C refractories after treated at different temperatures and its effect on the comprehensive properties of Al2O3-C refractories were analyzed by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The results show that a gradual decomposition of Cr2AlB2 in Al2O3-C refractories generates a core-shell structure of CrB and Al2O3 covered with Al2O3, and catalyses the formation of carbon nanotubes and carbon fibers on the surface of the core-shell structure after thermal treatment at 800-1 200 ℃. Cr3C2 covered by BN structure is formed inside the core-shell structure after thermal treatment at 1 200-1 600 ℃. As a result, the densification of Al2O3-C refractories is facilitated, and the cold modulus of rupture and oxidation resistance is enhanced. The cold modulus of rupture after coking at 1 400-1 600 ℃ is increased by approximately 9%, and the oxide index after treated in air at 1 400 ℃ is reduced from 44% to 31%.

chromium aluminium boride  /  alumina-carbon refractories  /  structural evolution  /  mechanical properties  /  oxidation resistance
章阳, 李亚伟, 廖宁, 刘耕夫, 纪子旭. 高温下Cr2AlB2粉末在铝碳耐火材料中的结构演变及其对性能的影响. 硅酸盐学报, 2023 , 51 (3) : 579 -588 . DOI: 10.14062/j.issn.0454-5648.20221010
Yang ZHANG, Yawei LI, Ning LIAO, Gengfu LIU, Zixu JI. Structural Evolution of Cr2AlB2 Powder and Its Effect on Properties in Al2O3-C Refractories at High Temperature[J]. Journal of the Chinese Ceramic Society, 2023 , 51 (3) : 579 -588 . DOI: 10.14062/j.issn.0454-5648.20221010
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Year 2023 volume 51 Issue 3
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Article Info
doi: 10.14062/j.issn.0454-5648.20221010
  • Receive Date：2022-11-23
  • Online Date：2026-10-20
  • Published：2023-03-20
Article Data
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History
  • Received：2022-11-23
  • Revised：2022-12-18
Funding
Affiliations
    The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, China; National-Provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan 430081, China

Corresponding:

LI Yawei (1966-), male, Ph.D., Professor. E-mail:
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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