Synthesis of aluminum-based Metal Matrix Composites (MMCs) with lignite fly ash as reinforcement material

Moutsatsou, A; Itskos, GS; Koukouzas, N; Vounatsos, PP

dc.contributor.author	Moutsatsou, A	en
dc.contributor.author	Itskos, GS	en
dc.contributor.author	Koukouzas, N	en
dc.contributor.author	Vounatsos, PP	en
dc.date.accessioned	2014-03-01T02:52:07Z
dc.date.available	2014-03-01T02:52:07Z
dc.date.issued	2009	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35860
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-74849114001&partnerID=40&md5=34ba2b00bfb7a55bd3fa5868dc5ea9b5	en
dc.subject	Aluminum-based materials	en
dc.subject	Lignite fly ash	en
dc.subject	MMCs	en
dc.subject	Powder metallurgy	en
dc.subject.other	Aluminum-based materials	en
dc.subject.other	Aluminum/silicon	en
dc.subject.other	Chemical compositions	en
dc.subject.other	Class-f	en
dc.subject.other	Fly ash mixtures	en
dc.subject.other	Green compacts	en
dc.subject.other	Lignite fly ash	en
dc.subject.other	Metal matrices	en
dc.subject.other	Metal matrix composites	en
dc.subject.other	Microscopic study	en
dc.subject.other	Mineral phasis	en
dc.subject.other	Northern Greece	en
dc.subject.other	Reinforcement materials	en
dc.subject.other	Sintered compacts	en
dc.subject.other	Sintering time	en
dc.subject.other	Thermal behaviors	en
dc.subject.other	Volume change	en
dc.subject.other	Aluminum	en
dc.subject.other	Aluminum powder metallurgy	en
dc.subject.other	Calcium	en
dc.subject.other	Coal ash	en
dc.subject.other	Fly ash	en
dc.subject.other	Hardness	en
dc.subject.other	Lignite	en
dc.subject.other	Metallic matrix composites	en
dc.subject.other	Metallurgy	en
dc.subject.other	Powder metals	en
dc.subject.other	Reinforcement	en
dc.subject.other	Silicon	en
dc.subject.other	Silicon alloys	en
dc.subject.other	Sintering	en
dc.title	Synthesis of aluminum-based Metal Matrix Composites (MMCs) with lignite fly ash as reinforcement material	en
heal.type	conferenceItem	en
heal.publicationDate	2009	en
heal.abstract	In the present paper, two different lignite fly ashes (FAs) originated from Kardia, Northern Greece (KFA, Class C) and from Megalopolis, Southern Greece (MFA, Class F) were utilized for the fabrication of Al/fly ash Metal Matrix Composites (MMCs). Aluminum-fly ash and aluminum/silicon alloy (Al -12% Si) -fly ash mixtures containing 5%, 10% and 15% w/w fly ash were prepared and compacted. The products were tested for their thermal behavior and then sintered at 600°C for two (2h) and six hours (6h). The density and hardness of the sintered compacts were determined as a function of weight per cent of fly ash particles. Volume changes during sintering of green compacts were also estimated as a function of increasing fly ash weight per cent. Microscopic studies of green and sintered compacts were done to study the effectiveness of sintering. Additionally, the sintered compacts were characterized in terms of their chemical composition and mineralogical structure. Despite the higher porosity of the composites and the development of FA clusters in their metal matrix, there is a significant increase in hardness, especially for the high-calcareous KFAMMCs. Moreover, the results indicate that the density of the experimental products decreases by the increase of FA participation. The rise of Ca-Si and Si mineral phases is intense, particularly for the composites with the highest percentage presence of KFA (15%) and does not differentiate as a function of the sintering time. However, both the Al and Al-Si MMCs that underwent 2h sintering demonstrate higher hardness than the 6h-sintered.	en
heal.journalName	3rd World of Coal Ash, WOCA Conference - Proceedings	en