Microstructure homogeneity of milled aluminum A356-Si3N4 metal matrix composite powders

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dc.contributor.authorFernandez, Heydi
dc.contributor.authorOrdonez, Stella
dc.contributor.authorPesenti Pérez, Héctor
dc.contributor.authorEspinoza Gonzalez, Rodrigo
dc.contributor.authorLeoni, Matteo
dc.date2019
dc.date.accessioned2021-04-30T17:04:07Z
dc.date.available2021-04-30T17:04:07Z
dc.description.abstractA metal matrix composite was produced by co-milling an A356 aluminum alloy powder obtained by rotating electrode off-equilibrium solidification, with different mass fractions (10, 20 and 30%) of Si3N4. The structural and microstructural modifications occurring during the milling were investigated with X-ray powder diffraction (XRPD). Whole powder pattern modeling (WPPM) of the XRPD reveals the inhomogeneous nature of the material in terms of silicon content and allows the crystallite size distribution and dislocation content to be followed in detail for all phases present in the powder. Neither microscopy nor the traditional Scherrer equation can reveal such a detailed picture in this case. Short milling times are sufficient to homogenize the microstructure and to obtain nanoscale crystallites. Long milling times are advantageous to increase the dislocation density that might be favorable for subsequent sintering. (C) 2019 The Authors. Published by Elsevier B.V.
dc.identifier.citationJOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,Vol.8,2969-2977,2019
dc.identifier.doi10.1016/j.jmrt.2019.05.004
dc.identifier.urihttp://repositoriodigital.uct.cl/handle/10925/3802
dc.language.isoen
dc.publisherELSEVIER SCIENCE BV
dc.sourceJOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
dc.subject.englishMechanical milling
dc.subject.englishAluminum matrix composite
dc.subject.englishMicrostructure inhomogeneity
dc.subject.englishScherrer equation
dc.subject.englishWPPM
dc.titleMicrostructure homogeneity of milled aluminum A356-Si3N4 metal matrix composite powders
dc.typeArticle
uct.catalogadorWOS
uct.indizacionSCI
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