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Fabrication and characterization of aluminum matrix fly ash cenosphere composites using different stir casting routes

Published online by Cambridge University Press:  03 January 2014

Yufu Sun ,
Yezhe Lyu ,
Airong Jiang  and
Jingyu Zhao
Yufu Sun*
Affiliation:
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450002, People’s Republic of China
Yezhe Lyu
Affiliation:
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450002, People’s Republic of China; and Department of Machine Design, Royal Institute of Technology, Stockholm SE-10044, Sweden
Airong Jiang
Affiliation:
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450002, People’s Republic of China
Jingyu Zhao
Affiliation:
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450002, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: yufusun@zzu.edu.cn
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Abstract

Aluminum matrix fly ash (AMFA) cenosphere composites were fabricated using the stir casting technique. The used type of fly ash cenosphere, which accounted for over 60% in all fly ash particles, was in narrow and small size (2–30 μm). During synthesis, effects of several key technological parameters on microstructure and properties were investigated using orthogonal experimental design. The optimal technological parameter was achieved as: melt temperature of 700 °C + stirring rate of 1200 r/min + stirring time of 6 min + fly ash cenosphere content of 13 wt%. With this optimal technological parameter, as-cast and forged composites were manufactured. Their tensile strengths were measured and improved maximally by 50% when the cenosphere content is 13 wt%. Such size and content of fly ash cenosphere and technological parameter could largely improve the properties of composites, which should be introduced into the production process of AMFA composites.

Keywords

compositescastingAl

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Type
Articles
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Journal of Materials Research , Volume 29 , Issue 2 , 28 January 2014 , pp. 260 - 266
Copyright
Copyright © Materials Research Society 2013 

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