Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/4182
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dc.contributor.authorVieira, M. T.-
dc.contributor.authorMartins, A. G.-
dc.contributor.authorBarreiros, F. M.-
dc.contributor.authorMatos, M.-
dc.contributor.authorCastanho, J. M.-
dc.date.accessioned2008-09-01T10:43:30Z-
dc.date.available2008-09-01T10:43:30Z-
dc.date.issued2008en_US
dc.identifier.citationJournal of Materials Processing Technology. 201:1-3 (2008) 651-656en_US
dc.identifier.urihttp://hdl.handle.net/10316/4182-
dc.description.abstractThe current trend towards miniaturization has led to the increasing use of stainless steel powders as raw material in the manufacture small parts with complex shapes, e.g. medical devices. This paper focuses on the role of coated and uncoated low carbon stainless steel powders, having d50 = 7.3 [mu]m, normal particle size distribution and a shape factor of 1 on additive processes used in micromanufacturing, e.g. micro powder injection moulding ([mu]PIM). Surfaces were treated using a magnetron sputtering deposition apparatus equipped with a high frequency powder vibration and a continuous feed system. The results clearly show that the coated powders assume an "artichoke" morphology, which significantly increases the surface area. This combined with their nanocrystalline character leads to higher flowability than uncoated powders. However, no improvements have been observed concerning the critical powder volume concentration (CPVC) in feedstocks for [mu]PIM processing. In consolidation processes, the debinding temperatures can attain values higher than 500 °C. After debinding and sintering, the coating of steel powders can show lower carbon contamination in solid solution than uncoated ones. This result is very important particularly for powder microtechnology of low carbon stainless steel.en_US
dc.description.urihttp://www.sciencedirect.com/science/article/B6TGJ-4R7J837-19/1/c3ced7613d4cb2b5e4de14f154d7f51een_US
dc.format.mimetypeaplication/PDFen
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectCoated powdersen_US
dc.subjectStainless steelen_US
dc.subjectNanocrystallinityen_US
dc.subjectMicromanufacturingen_US
dc.titleSurface modification of stainless steel powders for microfabricationen_US
dc.typearticleen_US
dc.identifier.doi10.1016/j.jmatprotec.2007.11.162-
uc.controloAutoridadeSim-
item.fulltextCom Texto completo-
item.languageiso639-1en-
item.grantfulltextopen-
crisitem.author.researchunitCenter for Research in Neuropsychology and Cognitive Behavioral Intervention-
crisitem.author.orcid0000-0001-7320-7107-
Appears in Collections:FCTUC Eng.Mecânica - Artigos em Revistas Internacionais
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