Fabrication of MMCs from metal and alloy powders produced from scrap

Karayannis, VG; Moutsatsou, AK

dc.contributor.author	Karayannis, VG	en
dc.contributor.author	Moutsatsou, AK	en
dc.date.accessioned	2014-03-01T01:24:24Z
dc.date.available	2014-03-01T01:24:24Z
dc.date.issued	2006	en
dc.identifier.issn	09240136	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17245
dc.subject	Alloy matrix composites	en
dc.subject	Alloy powders	en
dc.subject	Metal matrix composites	en
dc.subject	Metal powders	en
dc.subject	Microstructure	en
dc.subject	Scrap	en
dc.subject.other	Metallurgy	en
dc.subject.other	Microstructure	en
dc.subject.other	Nickel compounds	en
dc.subject.other	Powder metals	en
dc.subject.other	Scanning electron microscopy	en
dc.subject.other	Sintering	en
dc.subject.other	X ray diffraction analysis	en
dc.subject.other	Alloy matrix composites	en
dc.subject.other	Alloy powders	en
dc.subject.other	Metal matric composites	en
dc.subject.other	Scrap	en
dc.subject.other	Composite materials	en
dc.title	Fabrication of MMCs from metal and alloy powders produced from scrap	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jmatprotec.2005.07.006	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jmatprotec.2005.07.006	en
heal.publicationDate	2006	en
heal.abstract	Metal matrix composites (MMCs) present a lot of advantages over conventional engineering materials due to their improved properties. In the present work, Ni3Fe-Al2O3 and (3Ni + Fe)-Al2O3 composites with a 100-65 wt% metals or alloy content were prepared. For that purpose, lower cost Ni, Fe and Ni3Fe powders, recovered from ferrous scrap by a hydrometallurgical process recently developed, with properties similar to typical commercial grades, were used along with commercial Al2O3 powder. An established simple and economical fabrication technique was applied, comprising uniaxial cold pressing and sintering. The composite microstructures were characterized by optical, scanning electron microscopy, EDX and XRD analysis. Density measurements were also performed by the Arcimedes' method. The used metallic powders generally showed a satisfactory behavior in the fabrication steps leading to the successful development of particle reinforced MMCs containing no phases other than the constituent and exhibiting a sintering degree varying with the ceramic content. Important porosity levels were revealed, that were more pronounced in the Ni3Fe-based composites, in which zinc stearate was demanded as a lubricant. © 2005 Elsevier B.V. All rights reserved.	en
heal.journalName	Journal of Materials Processing Technology	en
dc.identifier.doi	10.1016/j.jmatprotec.2005.07.006	en
dc.identifier.volume	171	en
dc.identifier.issue	2	en
dc.identifier.spage	295	en
dc.identifier.epage	300	en