In-situ synthesis of tungsten boride-carbide composite powders from WO3-B2O3-Mg-C quaternary system via a mechanochemical route

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dc.authorid0000-0002-9904-8885en_US
dc.contributor.authorŞenyurt, Berk
dc.contributor.authorAkçamlı, Nazlı
dc.contributor.authorAgaogullari, Duygu
dc.date.accessioned2021-03-20T20:09:13Z
dc.date.available2021-03-20T20:09:13Z
dc.date.issued2021
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Metalurji ve Malzeme Mühendisliği Bölümüen_US
dc.description.abstractIn this study, in-situ synthesis of tungsten boride-carbide composite powders using a mechanochemical processing (MCP) method was investigated on the WO3-B2O3-Mg-C quaternary powder system. The raw blends of WO3-B2O3-Mg-C were processed in a high-energy ball mill for between 8 and 24 h. In addition to the MCP duration, excess B2O3 or C reactants and ball-to-powder weight ratio (BPR) were tested as important process parameters which affected the resultant phases. After the mechanochemical reaction, the products were purified using 6 M HCl solution to eliminate the MgO by-product. FactSage 7.1 and HSC Chemistry Ver.4.1 thermochemical software was used to predict the thermodynamically possible reactions and products. Microstructural properties of the fabricated powders were inspected through X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM and TEM) and energy dispersive spectroscopy (EDS) techniques. Additionally, changes in particle size with duration of the MCP were determined for the synthesized powders. According to the XRD results, tungsten boride and tungsten carbide phases were obtained as the main reaction products for all reaction durations and reactant stoichiometries. Distribution of the total amounts of tungsten boride and tungsten carbide phases were determined respectively as 79.8 and 20.2 wt% for the 8 h-processed stoichiometric powders. However, the total tungsten boride amount decreased with the increasing MCP duration and its respective percentage was calculated as 57.1 wt% for the 24 h-processed stoichiometric powders. In addition, by increasing the processing duration to over 12 h, W2B, W2C and B4C phases were detected. When 200 wt% B2O3 was added, the B:W ratio and total amount of tungsten boride phases in the synthesized powders increased. Similarly, by utilizing 200 wt% C, a significant increase in the B4C peaks together with W2C peaks was detected. Therefore, the properties of tungsten boride-carbide composite powders synthesized by the mechanochemical route are highly affected by the process parameters.en_US
dc.description.sponsorshipBursa Technical University Scientific Research Projects [190Y010]en_US
dc.description.sponsorshipThis study was financially supported by Bursa Technical University Scientific Research Projects with the project number of 190Y010.en_US
dc.identifier.doi10.1016/j.ceramint.2020.08.280en_US
dc.identifier.endpage1650en_US
dc.identifier.issn0272-8842
dc.identifier.issn1873-3956
dc.identifier.issue2en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage1640en_US
dc.identifier.urihttp://doi.org/10.1016/j.ceramint.2020.08.280
dc.identifier.urihttps://hdl.handle.net/20.500.12885/305
dc.identifier.volume47en_US
dc.identifier.wosWOS:000597762100001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorŞenyurt, Berk
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.subjectIn-situ formed compositesen_US
dc.subjectTungsten borideen_US
dc.subjectTungsten carbideen_US
dc.subjectMechanochemical synthesisen_US
dc.titleIn-situ synthesis of tungsten boride-carbide composite powders from WO3-B2O3-Mg-C quaternary system via a mechanochemical routeen_US
dc.typeArticleen_US

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