RETRACTED: Effects of Cr2O3 Content on Microstructure and Mechanical Properties of Al2O3 Matrix Composites
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Source abstract
Abstract
Al2O3-Cr2O3 refractories are completely substitution solid solutions and can effectively resist slag erosion when used as an industrial furnace lining. In order to provide suitable chromium corundum refractory with excellent slag resistance and mechanical properties for smelting reduction ironmaking, Al2O3-Cr2O3 samples with different mass percentages (0, 10, 20, 30, 40 wt.%) of Cr2O3 were prepared by a normal pressure sintering process to study its sintering properties, mechanical properties, thermal shock resistance, and microstructure. The results of densification behavior showed that the introduction of Cr2O3 deteriorates the compactness, the relative density and volume shrinkage rate of the composite material decrease with the increase of the Cr2O3 content, and the apparent porosity increases accordingly. In terms of mechanical properties, the hardness, compressive strength, and flexural strength of Al2O3-Cr2O3 material decrease gradually with the increase of Cr2O3. After 10 and 20 thermal shock cycles, the flexural strengths of the samples all decreased. With the increase of Cr2O3 in these samples, the loss rate of flexural strength gradually increased. Considering the slag resistance and mechanical properties of the composite material, the Al2O3-Cr2O3 composite refractory with Cr2O3 content of 20–30% can meet the requirements of smelting reduction iron making kiln lining.
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Research context
OpenAlex topics: Advanced materials and composites · Recycling and utilization of industrial and municipal waste in materials production · Iron and Steelmaking Processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Metallurgical Engineering, Anhui University of Technology, Maanshan 243002, China
College of Material Science and Engineering, Chongqing University, Chongqing 400030, China
School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
Department of Environmental Science and Engineering, Government College University, Faisalabad 38000, Pakistan
Department of Biological Sciences and Technology, China Medical University, Taichung 40402, Taiwan
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