The Origins of High-Entropy Alloy Contamination Induced by Mechanical Alloying and Sintering

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dc.contributor.authorMoravčík, Igorcs
dc.contributor.authorKubíček, Antoníncs
dc.contributor.authorMoravčíková de Almeida Gouva, Larissacs
dc.contributor.authorAdam, Ondřejcs
dc.contributor.authorKaňa, Václavcs
dc.contributor.authorPouchlý, Václavcs
dc.contributor.authorZáděra, Antoníncs
dc.contributor.authorDlouhý, Ivocs
dc.coverage.issue9cs
dc.coverage.volume10cs
dc.date.accessioned2020-11-25T15:54:35Z
dc.date.available2020-11-25T15:54:35Z
dc.date.issued2020-09-03cs
dc.description.abstractOne of the prevailing problems for materials produced by powder metallurgy is contamination from various sources. This work deals with the influence of process parameters and presence of process control agents (PCA) on the contamination level of materials produced by means of mechanical alloying (MA) technology, densified with spark plasma sintering (SPS). The equiatomic CoCrFeNi high-entropy alloy (HEA) was manufactured by the said methodology. For clear comparison, the 316L austenitic steel powder was milled and densified with identical conditions as a reference material. Both materials were milled in argon and nitrogen atmospheres for various times from 5 to 30 h. Chemical analysis of contamination by carbon, oxygen, and nitrogen within the powder and bulk materials was carried out using combustion analyzers. The microstructural analysis of powders and bulk samples was carried out using scanning electron microscopy (SEM) with focus on contaminant phases. The results show that carbon contamination increases with milling time. It is caused by wear of milling vial and balls made from high-carbon steels. Increase of carbon content within consolidation using SPS was also observed. The oxygen contamination also increases with milling time. It is more pronounced in the CoCrFeNi alloy due to higher oxidation of powder surfaces prior to milling. Milling of powders using nitrogen atmosphere also causes an increase of nitrogen content in both HEA and AISI 316L. The use of PCA (ethanol) during milling even for a short time (30 min) causes significant increase of carbon and oxygen contamination. The ways to decrease contamination are discussed in the paper.en
dc.formattextcs
dc.format.extent1-15cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationMetals. 2020, vol. 10, issue 9, p. 1-15.en
dc.identifier.doi10.3390/met10091186cs
dc.identifier.issn2075-4701cs
dc.identifier.other165147cs
dc.identifier.urihttp://hdl.handle.net/11012/195695
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofMetalscs
dc.relation.urihttps://www.mdpi.com/2075-4701/10/9/1186cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2075-4701/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectcontaminationen
dc.subjectmechanical alloyingen
dc.subjectspark plasma sinteringen
dc.subjectinfrared detectionen
dc.subjecthigh-entropy alloyen
dc.subjectaustenitic stainless steelen
dc.titleThe Origins of High-Entropy Alloy Contamination Induced by Mechanical Alloying and Sinteringen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-165147en
sync.item.dbtypeVAVen
sync.item.insts2021.02.15 00:59:13en
sync.item.modts2021.02.15 00:15:45en
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Inovační technologie v keramicecs
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav materiálových věd a inženýrstvícs
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav strojírenské technologiecs
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