Characterization of mechanically alloyed and pressureless sintered Al-7 wt% Si-2 wt% LaB6-2 wt% (MoSi2, WSi2) hybrid composites

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dc.authorid0000-0001-8199-4032en_US
dc.contributor.authorTekoglu, Emre
dc.contributor.authorYürektürk, Yakup
dc.contributor.authorAgaogullari, Duygu
dc.contributor.authorOvali, Didem
dc.contributor.authorMertdinc, Siddika
dc.contributor.authorOvecoglu, M. Lutfi
dc.date.accessioned2021-03-20T20:12:26Z
dc.date.available2021-03-20T20:12:26Z
dc.date.issued2019
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Metalurji ve Malzeme Mühendisliği Bölümüen_US
dc.description.abstractThe purpose of this research is to investigate the dual effect of silicide (MoSi2 or WSi2) and LaB6 reinforcing particles on the microstructural and mechanical properties of Al-7 wt% Si (Al7Si) matrix. Hypoeutectic Al7Si blends prepared from elemental Al and Si powders were mechanically alloyed (MA'd) for 12 h in a planetary ball mill (at 300 rpm). Afterwards, 2 wt% silicide reinforcements (MoSi2 or WSi2) with various particle size distributions (micron, bimodal, submicron) were separately added into these MA'd Al7Si powders together with 2 wt% of LaB6 particles. Powders having compositions of Al7Si, Al7Si-2 wt% LaB6, Al7Si-2 wt% LaB6-2 wt% MoSi2 and Al7Si-2 wt% LaB6-2 wt% WSi2 were milled for 30 min using a high-energy ball mill (at 1200 rpm) in order to obtain homogeneous distribution throughout the microstructure. Compositional, microstructural and mechanical characterization studies were performed on the sintered samples. The results showed that high-energy ball milling ensured the homogeneous distribution of micron-sized MoSi2 and WSi2 particles within the matrix rather than those of bimodal and submicron-sized ones. Micron-sized MoSi2 and WSi2 reinforced hybrid composites displayed dramatically higher hardness and wear resistance than those of composites reinforced with different size of MoSi2 and WSi2 particles. The striking point of the study was the remarkably higher hardness and wear resistance properties of the hybrid composites compared to those of un-reinforced and only LaB6-reinforced ones. As a conclusion, hybrid composites extremely displayed promising mechanical properties. (C) 2019 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.en_US
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [214M093]en_US
dc.description.sponsorshipThis study was supported by a research project financed by The Scientific and Technological Research Council of Turkey (TUBITAK) with the project number of 214M093.en_US
dc.identifier.doi10.1016/j.apt.2019.08.010en_US
dc.identifier.endpage2635en_US
dc.identifier.issn0921-8831
dc.identifier.issn1568-5527
dc.identifier.issue11en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage2626en_US
dc.identifier.urihttp://doi.org/10.1016/j.apt.2019.08.010
dc.identifier.urihttps://hdl.handle.net/20.500.12885/559
dc.identifier.volume30en_US
dc.identifier.wosWOS:000490130200020en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorYürektürk, Yakup
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofAdvanced Powder Technologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAl-Si matrix compositesen_US
dc.subjectMolybdenum disilicideen_US
dc.subjectTungsten disilicideen_US
dc.subjectMechanical alloyingen_US
dc.subjectMicrostructural/mechanical propertiesen_US
dc.titleCharacterization of mechanically alloyed and pressureless sintered Al-7 wt% Si-2 wt% LaB6-2 wt% (MoSi2, WSi2) hybrid compositesen_US
dc.typeArticleen_US

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