Effect of micro-Al2O3 powders on oxidation and corrosion behaviors of low-carbon MgO-C refractories

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外文摘要：To solve the problem of poor high-temperature service performance caused by low carbonization of MgO-C refractories,low-carbon MgO-C refractories with excellent thermal shock,oxidation and corrosion resistances were successfully designed by using SiC whiskers as reinforcing phases and introducing micro-Al2O3 powders as additives.The results indicated that the addition of micro-Al2O3 powders optimized the internal structure of the material,like the columnar β-Si3N4 with a stepped distribution and the mosaic structure formed between granular and flaky Mg2SiO4,which syner-gistically strengthened and toughened the material and gave the material excellent mechanical properties and thermal shock resistance.Specifically,the cold modulus of rupture and cold crushing strength after thermal shock were increased by 4.1 and 20.3 MPa,respectively.Moreover,the addition of micro-Al2O3 powders promoted the formation of fine particles of Mg2SiO4,MgAl2O4 and MgO,as well as a dense protective layer of Mg2SiO4 in the material under high-temperature environment.Furthermore,spinel and high-temperature solid solution were formed in the corrosion envi-ronment.The oxidation and corrosion resistances were greatly improved by 41％and 15％,respectively.

外文关键词：

Low-carbon MgO-C refractoryOxidation resistanceCorrosion resistanceThermal shock resistanceMicro-Al2O3 powder

作者：

Yang Chen、Zeng-yi Li、Hao-bo Tan、Yu-ran Fu、Jun Ding、Cheng-ji Deng、Chao Yu

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作者单位：

School of Materials Science and Engineering,Hunan Institute of Technology,Hengyang 421002,Hunan,China

The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China

基金：

Scientific Research Fund of Hunan Provincial Education DepartmentHengyang"Xiaohe"Science and Technology Talent Special ProjectGuidance Plan Project of Hengyang CityNational Natural Science Foundation of ChinaCollege Students'Innovation and Entrepreneurship Training ProjectCharacteristic Application Discipline of Material Science Engineering in Hunan Province

项目编号：

22B0856[2023]45[2023]40U20A20239S202311528055[2022]351

出版年：

2024

DOI：

10.1007/s42243-024-01207-4

钢铁研究学报(英文版)

钢铁研究总院

钢铁研究学报(英文版)

CSTPCD

影响因子：0.584

ISSN：1006-706X

年,卷(期)：2024.31(6)