Effect of Carbon Addition and Mixture Method on the Microstructure and Mechanical Properties of Silicon Carbide

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dc.authoridYasar, Zeynep Ayguzer / 0000-0002-5434-9529
dc.authorwosidYasar, Zeynep Ayguzer / AAG-6513-2020
dc.contributor.authorYasar, Zeynep Ayguzer
dc.contributor.authorHaber, Richard A.
dc.date.accessioned2021-11-01T15:03:14Z
dc.date.available2021-11-01T15:03:14Z
dc.date.issued2020
dc.department[Belirlenecek]
dc.description.abstractHigh dense (>99% density) SiC ceramics were produced with addition of C and B4C by spark plasma sintering method at 1950 degrees C under 50 MPa applied pressure for 5 min. To remove the oxygen from the SiC, it was essential to add C. Two different mixture method were used, dry mixing (specktromill) and wet mixing (ball milling). The effect of different levels of carbon additive and mixture method on density, microstructure, elastic modulus, polytype of SiC, Vickers hardness, and fracture toughness were examined. Precisely, 1.5 wt.% C addition was sufficient to remove oxide layer from SiC and improve the properties of dense SiC ceramics. The highest hardness and elastic modulus values were 27.96 and 450 GPa, respectively. Results showed that the 4H polytype caused large elongated grains, while the 6H polytype caused small coaxial grains. It has been observed that it was important to remove oxygen to achieve high density and improve properties of SiC. Other key factor was to include sufficient amount of carbon to remove oxide layer. The results showed that excess carbon prevented to achieve high density with high elastic modulus and hardness.
dc.description.sponsorshipNational Science Foundation I/UCRC AwardNational Science Foundation (NSF) [1540027]; Materials for Extreme Dynamic Environments program; US Army Research LaboratoryUnited States Department of DefenseUS Army Research Laboratory (ARL) [W911NF-12-2-0022]en_US
dc.description.sponsorshipResearch was sponsored by the National Science Foundation I/UCRC Award No. 1540027. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the National Science Foundation or the US Government. The US Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation herein. Additional funding was provided by the Materials for Extreme Dynamic Environments program sponsored by the US Army Research Laboratory Cooperative Agreement (W911NF-12-2-0022).en_US
dc.identifier.doi10.3390/ma13173768
dc.identifier.issn1996-1944
dc.identifier.issue17en_US
dc.identifier.pmid32858968
dc.identifier.scopus2-s2.0-85090496256
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.3390/ma13173768
dc.identifier.urihttps://hdl.handle.net/11491/7036
dc.identifier.volume13en_US
dc.identifier.wosWOS:000569583300001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.institutionauthor[Belirlenecek]
dc.language.isoen
dc.publisherMdpi
dc.relation.ispartofMaterials
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectsilicon carbideen_US
dc.subjectcarbonen_US
dc.subjectmixture methoden_US
dc.subjectmicrostructureen_US
dc.subjectspark plasma sinteringen_US
dc.subjectceramics mechanical propertyen_US
dc.titleEffect of Carbon Addition and Mixture Method on the Microstructure and Mechanical Properties of Silicon Carbide
dc.typeArticle

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