| Microstructures and Mechanism of Al_2O_3/Al Composites Fabricated by the Reaction between SiO_2 and Molten Aluminum |
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| 引用本文： | 程晓敏. Microstructures and Mechanism of Al_2O_3/Al Composites Fabricated by the Reaction between SiO_2 and Molten Aluminum[J]. 武汉理工大学学报(材料科学英文版), 2003, 18(3) |
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| 作者姓名： | 程晓敏 |
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| 作者单位： | School of |
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| 基金项目： | theNationalNaturalScienceFoundationofChina(No.915 2 2 ) |
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| 摘 要： | 1 IntroductionAmongtheavailablemethodsforfabricatingcompos ite ,thein situreactionsynthesispossessestechnicalandeconomicadvantages :simpleprocess ,lowfabricationcost .Throughthechemicalreactionbetweenliquidandsolid ,in situreinforcedceramicparticleswithfinedimen sionandgooddistributioncanbeformed .Theparticleshaveawellcombinedinterfacewiththematrixandhavenopollutionofimpurities .Thecompositeobtainedbyin situreactionhasexcellentproperties ,soithaswideap plications .Inthefabricationofthein sit…
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Microstructures and Mechanism of Al2O3/Al Composites Fabricated by the Reaction between SiO2 and Molten Aluminum |
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| CHENG Xiao-min,ZHANG Lian-meng,CHEN Tie-qun. Microstructures and Mechanism of Al2O3/Al Composites Fabricated by the Reaction between SiO2 and Molten Aluminum[J]. Journal of Wuhan University of Technology. Materials Science Edition, 2003, 18(3) |
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| Authors: | CHENG Xiao-min ZHANG Lian-meng CHEN Tie-qun |
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| Affiliation: | CHENG Xiao min 1) ZHANG Lian meng 1) CHEN Tie qun 2) 1) Wuhan University of Technology 2) South China University of Technology |
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| Abstract: | Al2O3/Al composite was fabricated by the reaction between SiO2 and molten aluminum.The microstructures of the composite obtained under different reaction conditions were analyzed. The formation mechanism of the composite microstructure was discussed. Results show that the reaction kinetics is influenced remarkably by the reaction temperature, reaction time and the quantity of SiO2.The morphologies of Al2O3 have different features,depending on the reaction temperature.The composite has equiaxed Al2O3 grains when materials reacted below 1200℃,and the composite is composed of a large number of fine Al2O3 grains and aluminum.The composite has a frame-shaped Al2O3 microstructure at the reaction temperature of above 1250℃. |
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| Keywords: | Al 2O 3/Al composite in situ reaction vitreous silica microstructure |
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