Effects of SiC and MgO on alumina-based ceramic foams filters |
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Authors: | CAO Da-li ZHOU Jing-yi JIN Yong-ming MA Lei SHI Zhong-ning WANG Zhao-wen |
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Affiliation: | 1. Shenyang Institute of Chemical Technology,Shenyang 110142,China 2. Shenyang Research Institute of Foundry, Shenyang 110022,China 3. School of Materials and Metallurgy,Northeastern University,Shenyang,110006,China |
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Abstract: | Alumina-based foam ceramic filters were fabricated by using alumina, SiC, magnesia powder as major materials. It has been found that this ceramic filter has a uniform macrostructure for filtering molten metals. The influences of SiC and magnesia content, the sintering temperatures on ceramic properties were discussed. Aluminabased foam ceramic filters containing 2.2 mass% magnesia and 7.6 mass% SiC has a compressive strength of 1.36 MPa and a thermal shock resistance of 5 times. Its main phases after 1 hour sintering at 1 500℃ consist of alumina,silicon carbide, spinel and mullite. |
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Keywords: | alumina-based foam ceramic filters compressive strength molten metal MgO SiC |
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