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Effects of HfB2 addition on the oxidation resistance, microstructure, and mechanical properties of pressureless sintered ZrB2-SiC composite

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dc.contributor.authorMashhadi M.en_US
dc.contributor.authorSalimi I.G.en_US
dc.contributor.authorGolieskardi M.en_US
dc.contributor.authorid24776823200en_US
dc.contributor.authorid57221439232en_US
dc.contributor.authorid55866907000en_US
dc.date.accessioned2023-05-29T09:12:36Z
dc.date.available2023-05-29T09:12:36Z
dc.date.issued2021
dc.descriptionMicrostructure; Molybdenum compounds; Oxidation resistance; Particle size; Silicon carbide; Vickers hardness; X ray diffraction analysis; Zirconium compounds; Nano-sized particles; Oxidized surfaces; Oxygen penetration; Pressureless-sintered; Reinforcing phase; SiC-based ceramics; Silicon carbides (SiC); Solid solution formation; Hafnium compoundsen_US
dc.description.abstractIn order to improve oxidation resistance and mechanical properties of ZrB2-based composites, 10% silicon carbide (SiC) nano-sized particles were used as a reinforcing phase and 4% MoSi2 as a synthesizer aid. In this work, the effects of HfB2 addition (0, 5, 10, 15, 20, and 25%) on Vickers hardness, bulk density, oxidation resistance, and microstructure of the ZrB2-SiC-based ceramics were investigated. The results revealed that the samples consisting of 10% HfB2 have the highest relative density (98.4%). The lowest apparent porosity (i.e., 15%) and the highest hardness (i.e., 15.24 GPa) of the samples were achieved by the addition of 20% HfB2. The X-ray diffraction (XRD) analysis indicated that prolonging the oxidation period resulted in the production of more oxide compounds. The sample containing 25% HfB2 in addition to the lowest relative density due to the oxidized surface erosion and the formation of a poor layer of porous SiC exhibited the maximum oxygen penetration into the sample, the highest gain in mass, and the least oxidation resistance even compared to the ZrB2-SiC composite without the HfB2 addition. It was concluded that by increasing the temperature and time, solid solution formation increases. � 2020 by Begell House, Inc.en_US
dc.description.natureFinalen_US
dc.identifier.doi10.1615/COMPMECHCOMPUTAPPLINTJ.2020030129
dc.identifier.epage308
dc.identifier.issue4
dc.identifier.scopus2-s2.0-85099140482
dc.identifier.spage287
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85099140482&doi=10.1615%2fCOMPMECHCOMPUTAPPLINTJ.2020030129&partnerID=40&md5=6e1362bb79ae3b8ef798b4cc87539f27
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/26602
dc.identifier.volume11
dc.publisherBegell House Inc.en_US
dc.sourceScopus
dc.sourcetitleComposites: Mechanics, Computations, Applications
dc.titleEffects of HfB2 addition on the oxidation resistance, microstructure, and mechanical properties of pressureless sintered ZrB2-SiC compositeen_US
dc.typeArticleen_US
dspace.entity.typePublication
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