Synthesis of HfB2 powders by mechanically activated borothermal reduction of HfCl4

Basit Öğe Kaydı
dc.authorid0000-0002-8638-3756en_US
dc.contributor.authorAkçamlı, Nazlı
dc.contributor.authorAgaogullari, Duygu
dc.contributor.authorBalci, Ozge
dc.contributor.authorOvecoglu, M. Lutfi
dc.contributor.authorDuman, Ismail
dc.date.accessioned2021-03-20T20:14:41Z
dc.date.available2021-03-20T20:14:41Z
dc.date.issued2016
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Metalurji ve Malzeme Mühendisliği Bölümüen_US
dc.description.abstractHfB2 powders were synthesized via a borothermal reduction route from mechanically activated HfCl4 and B powder blends. Mechanical activation of the powder blends was carried out for 1 h in a high-energy ball mill using hardened steel vial and balls. Mechanically activated powders were subsequently annealed at 1100 degrees C for 1 h under Ar atmosphere. Then, purification processes such as washing with distilled water and leaching in HCl solution were applied for the elimination of the undesired boron oxide (B2O3) phase and the probable Fe impurity. The effect of boron amount on the microstructure of the resultant powders was investigated. The boron amount in the starting blends plays an important role in the formation of the HfO2 phase. HfB2 powders without any detectable HfO2 were prepared by adding 20 wt% excess amount of boron. Microstructural analyses of the mechanically activated, annealed and purified powders were performed using X-ray diffractometer (XRD), particle size analyzer (PSA), stereomicroscope (SM), scanning electron microscope/energy dispersive spectrometer (SEM/EDS) and transmission electron microscope (TEM). (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.en_US
dc.description.sponsorshipIstanbul Technical University Scientific Research ProjectsIstanbul Technical University [37544]; The Scientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [112M470]en_US
dc.description.sponsorshipThis study was financially supported by "Istanbul Technical University Scientific Research Projects" with the project number of 37544 and "The Scientific and Technological Research Council of Turkey (TUBITAK)" with the project number of 112M470.en_US
dc.identifier.doi10.1016/j.ceramint.2015.11.041en_US
dc.identifier.endpage3807en_US
dc.identifier.issn0272-8842
dc.identifier.issn1873-3956
dc.identifier.issue3en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage3797en_US
dc.identifier.urihttp://doi.org/10.1016/j.ceramint.2015.11.041
dc.identifier.urihttps://hdl.handle.net/20.500.12885/1090
dc.identifier.volume42en_US
dc.identifier.wosWOS:000369190900009en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorAkçamlı, Nazlı
dc.language.isoenen_US
dc.publisherElsevier Sci Ltden_US
dc.relation.ispartofCeramics Internationalen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectHafnium diborideen_US
dc.subjectHafnium tetrachlorideen_US
dc.subjectBorothermal reductionen_US
dc.subjectMechanical activationen_US
dc.subjectPurificationen_US
dc.titleSynthesis of HfB2 powders by mechanically activated borothermal reduction of HfCl4en_US
dc.typeArticleen_US

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
Metalurji ve Malzeme Mühendisliği Bölümü Yayın Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu