Correlation of microstructure and mechanical properties of Al 2 O 3 ‐C bodies containing Nano‐Al 2 O 3 and Nano‐TiO 2 additives
Source abstract
Abstract
Abstract Al 2 O 3 ‐C foam filters have been successfully used for steel and aluminum melts filtration. Improving the high‐temperature mechanical properties enhances the capability and application of these filters for the filtration of large steel casting parts along with ingot casting or continuous casting of steel for long periods of time. In this study, adding nano‐Al 2 O 3 and/or nano‐TiO 2 to the composition of Al 2 O 3 ‐C filters was investigated. Uniaxially pressed Al 2 O 3 ‐C samples containing additives in the range from 0 to 1.0 wt% of nano‐oxides were prepared. The physical and mechanical properties, as well as microstructural analysis, were measured after sintering at 1600°C for 5 hours under a petroleum coke bed. The results showed that the presence of nano‐Al 2 O 3 particles in the composition led to an increase in the cold crushing strength (CCS) due to the formation of the Al 3 CON phase which acts as a chemical bonding between Al 2 O 3 particles and the carbonaceous matrix. On the other hand, the addition of 1.0 wt% of nano‐TiO 2 in the composition caused an increase of 50% in the hot modulus of rupture (HMOR), attributed to the formation of columnar Al 2 O 3 grains in the microstructure.
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Research context
OpenAlex topics: Advanced ceramic materials synthesis · Aluminum Alloys Composites Properties · High-Temperature Coating Behaviors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Advanced Materials Research Center Materials Engineering Department Najafabad Branch, Islamic Azad University Najafabad Isfahan Iran
Department of Materials Science and Engineering Shahreza Branch, Islamic Azad University Shahreza Isfahan Iran
Federal University of São Carlos Materials Microstructure Engineering Group (GEMM) FIRE Associate Laboratory São Carlos SP Brazil
College of Technology FATEC Sertãozinho Sertãozinho Brazil
Funding
Islamic Azad University
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