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Microstructures and Texture of Al/Al2O3 Composites Fabricated by a Powder-in Sheath Rolling Method
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HOME > J Korean Powder Metall Inst > Volume 10(2); 2003 > Article
분말시스압연법에 의해 제조한 Al/Al2O3 복합재료의 미세조직 및 집합조직
Microstructures and Texture of Al/Al2O3 Composites Fabricated by a Powder-in Sheath Rolling Method
Journal of Korean Powder Metallurgy Institute 2003;10(2):103-107
DOI: https://doi.org/10.4150/KPMI.2003.10.2.103
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Aluminum-based Al/Al_2O_3 composites were fabricated by a powder-in sheath rolling method. A stainless steel tube with outer diameter of 12 mm and wall thickness of 1 mm was used as a sheath. A mixture of aluminum powder and Al_2O_3 particles of which volume content was varied from 5 to 20%, was filled in the tube by tap filling and then rolled by 75% reduction in thickness at ambient temperature. The rolled specimen was then sintered at 560°C for 0.5 h. The mixture of Al powders and Al_2O_3 particles was successfully consolidated by the sheath rolling. The Al/Al_2O_3 composite fabricated by the sheath rolling showed a recrystallized structure, while unreinforced Al powder compact fabricated by the same procedure showed a deformed structure. The unreinforced Al powder compact was characterized by a deformation (rolling) texture of which main component is 112<111>, while the Al/Al_2O_3 composite showed a mixed texture oi deformation and recrystallization. The sintering resulted in recrystallization in Al powder compact and grain growth in the composite.


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