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|Title:||Thermal expansion of aluminum–fly ash cenosphere composites synthesized by pressure infiltration technique||Authors:||Al Araj, Simon
Rohatgi, P. K.
|Keywords:||Fly ash - Analysis;Aluminum alloys;Expansion (Heat)||Issue Date:||2005||Abstract:||The coefficients of thermal expansion (CTEs) of commercially available pure aluminum and aluminum alloy composites containing hollow fly ash particles (cenospheres) of average size 125 mm are measured using a dilatometer. Three types of composites are made using the pressure infiltration technique at applied pressures and infiltration times of 35 kPa for 3 min, 35 kPa for 7 min, and 62 kPa for 7 min. The volume fractions of the fly ash cenospheres in the composites are around 65%. The CTE of the composites is measured to be in the range of 13.1 106 –11 106 / C, which is lower than that of pure aluminum (25.3 106 / C). The infiltration processing conditions are found to influence the CTE of the composites. A higher applied pressure and a longer infiltration time lead to a lower CTE. The theoretical value of the CTE of fly ash cenospheres is estimated to be 6.1 106 / C. KEY||URI:||http://hdl.handle.net/20.500.11889/4136|
|Appears in Collections:||Fulltext Publications|
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