Microstructural characterization of PM-Al and PM-Al/Si composites reinforced with lignite fly ash
作者： Angeliki Moutsatsou , Grigorios Itskos , Panagiotis Vounatsos , Nikolaos Koukouzas , Charalampos Vasilatos
DOI: 10.1016/J.MSEA.2010.04.001
关键词:
摘要: In the present paper, two Class C, lignite fly ashes (FAs) were utilized for fabrication of Al/fly ash metal matrix composites (MMCs) using powder metallurgy (PM) technique. Aluminum–fly and aluminum/silicon alloy (Al–12% Si)–fly mixtures, containing 5, 10 15 wt.% – both pozzolanic hydraulic FAs prepared compacted. The green products tested their thermal behavior in order sintering temperature to be determined. Then, they sintered 2 6 h. density was decreasing with increase percentage participation particles into them. Apart from that, although FA clusters had been developing matrix, there a significant enhancement hardness MMCs when increasing content, which is mainly attributed intense calcareous nature reinforcement material. Volume mass changes throughout calcination also estimated as function weight percent it seems that CaO (%) plays crucial role regarding post-sintering raise volume composites. Microscopic studies compacts clearly indicated effectiveness process. Additionally, characterized terms chemical composition mineralogical structure. rise Ca–Si- Si-mineral phases intense, particularly highest presence (15 wt.%) does not differentiate time.
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