Effect of mechanical alloying on the morphology, microstructure and properties of aluminium matrix composite powders

dc.creatorFogagnolo, JB
dc.creatorVelasco, F
dc.creatorRobert, MH
dc.creatorTorralba, JM
dc.date2003
dc.dateFEB 15
dc.date2014-11-17T16:23:02Z
dc.date2015-11-26T17:40:24Z
dc.date2014-11-17T16:23:02Z
dc.date2015-11-26T17:40:24Z
dc.date.accessioned2018-03-29T00:22:04Z
dc.date.available2018-03-29T00:22:04Z
dc.identifierMaterials Science And Engineering A-structural Materials Properties Microstructure And Processing. Elsevier Science Sa, v. 342, n. 41671, n. 131, n. 143, 2003.
dc.identifier0921-5093
dc.identifierWOS:000179568900015
dc.identifier10.1016/S0921-5093(02)00246-0
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/64340
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/64340
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/64340
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1286716
dc.descriptionA composite powder with a fine homogeneous distribution of the reinforcement phase in the whole particle can be obtained by mechanical alloying. Aluminium PM6061 unreinforced, and matrix composite reinforced with Si3N4 and AlN powder, are milled in a high-energy attritor mill and the powder properties are compared with those of the same composite composition mixed in a horizontal low-energy ball mill. The correlation observed between the apparent densities and the milling time, explained by the morphological and microstructural evolution of the powder particles during the high-energy milling process, is used to determine the steady state of the process. At short milling times, the apparent density decreases as the milling time is extended, due to the deformation dominant at this stage; at longer milling times, it starts to increase with increasing milling time due to the piling up of the flattened particles and fracture of the welded particles. When mechanical alloying reaches the steady state, the apparent density is stabilized. A simple model is proposed to illustrate the mechanical alloying of a ductile-brittle component system. The particle size distribution and the microhardness of the mechanically alloyed particles are determined. (C) 2002 Elsevier Science B.V. All rights reserved.
dc.description342
dc.description41671
dc.description131
dc.description143
dc.languageen
dc.publisherElsevier Science Sa
dc.publisherLausanne
dc.publisherSuíça
dc.relationMaterials Science And Engineering A-structural Materials Properties Microstructure And Processing
dc.relationMater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectaluminium matrix composites
dc.subjectmechanical alloying
dc.subjectpowder metallurgy
dc.subjectsilicon nitride
dc.subjectaluminium nitride
dc.titleEffect of mechanical alloying on the morphology, microstructure and properties of aluminium matrix composite powders
dc.typeArtículos de revistas


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