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Manufacturing of Ultra-Fine Particle Coal Fly Ash–A380 Aluminum Matrix Composites with Improved Mechanical Properties by Improved Ring Milling and Oscillating Microgrid Mixing

Authors
  • Kaisarlis, Georgios1
  • Vasiliou, Georgios1
  • Spitas, Vasileios1
  • Inglezakis, Vassilis2
  • Itskos, Grigorios3
  • Spitas, Christos2
  • 1 National Technical University of Athens, School of Mechanical Engineering, Athens, Greece , Athens (Greece)
  • 2 Nazarbayev University, School of Engineering, Astana, Kazakhstan , Astana (Kazakhstan)
  • 3 Purdue University, School of Materials Engineering, West Lafayette, IN, USA , West Lafayette (United States)
Type
Published Article
Journal
Journal of Materials Engineering and Performance
Publisher
Springer US
Publication Date
May 13, 2019
Volume
28
Issue
5
Pages
2630–2640
Identifiers
DOI: 10.1007/s11665-019-04083-2
Source
Springer Nature
Keywords
License
Yellow

Abstract

An experimental study is presented of ultra-fine coal fly ash (CFA) aluminum matrix composites produced by successive high-power ring milling of CFA, oscillating microgrid mixing of the CFA–aluminum melt, gravity casting and rapid cooling. Samples corresponding to different CFA concentrations and particle size distributions (1 μm average, or less) are produced and subjected to microstructural and mechanical characterization, including tensile, compressive, impact, hardness and wear testing. While the usual trade-off between increased strength and hardness and reduced ductility and toughness is observed, the obtained ultra-fine particle composites are confirmed to have overall improved mechanical properties compared to composites with larger size particles previously produced by ball milling.

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