Powder metallurgy hollow fly ash cenospheres’ particles reinforced magnesium composites

S. Sankaranarayanan, Q. B. Nguyen, R. Shabadi, A. H. Almajid, M. Gupta

Research output: Contribution to journalArticleResearchpeer-review

Abstract

This study reports for the first time the synthesis of syntactic composite foams based on magnesium matrix and hollow fly ash cenosphere particles using the powder metallurgy technique involving hybrid microwave sintering. The effects of varying amounts of hollow cenosphere particle addition on the density, microstructure, thermomechanical and mechanical properties of pure magnesium were investigated. Density measurements indicated up to 18% reduction in density with the highest quantity of cenospheres (15%) addition to the magnesium. Microstructural examination demonstrated evenly distributed, intact and a few broken cenosphere particles with good interfacial integrity. Phase analysis showed finely distributed intermetallic phases such as MgO and Mg2Si due to the reaction between Mg matrix and the hollow cenosphere reinforcement. Mechanical property measurements showed retention/slight improvement in specific mechanical properties of magnesium due to hollow fly ash cenosphere particles. However, the tensile ductility was marginally affected.

Original languageEnglish
Pages (from-to)188-196
Number of pages9
JournalPowder Metallurgy
Volume59
Issue number3
DOIs
Publication statusPublished - 29 Jun 2016
Externally publishedYes

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Coal Ash
fly ash
powder metallurgy
Powder metallurgy
Fly ash
Magnesium
magnesium
hollow
composite materials
Composite materials
mechanical properties
Mechanical properties
Syntactics
matrices
reinforcement
ductility
foams
integrity
Intermetallics
intermetallics

Cite this

Sankaranarayanan, S. ; Nguyen, Q. B. ; Shabadi, R. ; Almajid, A. H. ; Gupta, M. / Powder metallurgy hollow fly ash cenospheres’ particles reinforced magnesium composites. In: Powder Metallurgy. 2016 ; Vol. 59, No. 3. pp. 188-196.
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abstract = "This study reports for the first time the synthesis of syntactic composite foams based on magnesium matrix and hollow fly ash cenosphere particles using the powder metallurgy technique involving hybrid microwave sintering. The effects of varying amounts of hollow cenosphere particle addition on the density, microstructure, thermomechanical and mechanical properties of pure magnesium were investigated. Density measurements indicated up to 18{\%} reduction in density with the highest quantity of cenospheres (15{\%}) addition to the magnesium. Microstructural examination demonstrated evenly distributed, intact and a few broken cenosphere particles with good interfacial integrity. Phase analysis showed finely distributed intermetallic phases such as MgO and Mg2Si due to the reaction between Mg matrix and the hollow cenosphere reinforcement. Mechanical property measurements showed retention/slight improvement in specific mechanical properties of magnesium due to hollow fly ash cenosphere particles. However, the tensile ductility was marginally affected.",
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Powder metallurgy hollow fly ash cenospheres’ particles reinforced magnesium composites. / Sankaranarayanan, S.; Nguyen, Q. B.; Shabadi, R.; Almajid, A. H.; Gupta, M.

In: Powder Metallurgy, Vol. 59, No. 3, 29.06.2016, p. 188-196.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Gupta, M.

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AB - This study reports for the first time the synthesis of syntactic composite foams based on magnesium matrix and hollow fly ash cenosphere particles using the powder metallurgy technique involving hybrid microwave sintering. The effects of varying amounts of hollow cenosphere particle addition on the density, microstructure, thermomechanical and mechanical properties of pure magnesium were investigated. Density measurements indicated up to 18% reduction in density with the highest quantity of cenospheres (15%) addition to the magnesium. Microstructural examination demonstrated evenly distributed, intact and a few broken cenosphere particles with good interfacial integrity. Phase analysis showed finely distributed intermetallic phases such as MgO and Mg2Si due to the reaction between Mg matrix and the hollow cenosphere reinforcement. Mechanical property measurements showed retention/slight improvement in specific mechanical properties of magnesium due to hollow fly ash cenosphere particles. However, the tensile ductility was marginally affected.

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