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Microwave sintering of zirconia-toughened alumina (ZTA)-TiO2-Cr2O3 ceramic composite: The effects on microstructure and properties

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dc.citedby41
dc.contributor.authorManshor H.en_US
dc.contributor.authorAbdullah E.C.en_US
dc.contributor.authorAzhar A.Z.A.en_US
dc.contributor.authorSing Y.W.en_US
dc.contributor.authorAhmad Z.A.en_US
dc.contributor.authorid55490332600en_US
dc.contributor.authorid23391987100en_US
dc.contributor.authorid25958888500en_US
dc.contributor.authorid12775149200en_US
dc.contributor.authorid56036883500en_US
dc.date.accessioned2023-05-29T06:40:30Z
dc.date.available2023-05-29T06:40:30Z
dc.date.issued2017
dc.descriptionAlumina; Ceramic materials; Densification; Density (specific gravity); Fracture; Fracture toughness; Grain growth; Mechanical properties; Microstructure; Microwave heating; Microwaves; Sintered alumina; Titanium dioxide; Vickers hardness; Zirconia; Conventional heating methods; Homogeneous microstructure; Lower sintering temperatures; Microstructural analysis; Microstructure and properties; Microwave sintering; Microwave sintering methods; Zirconia toughened alumina; Sinteringen_US
dc.description.abstractThis paper focuses on the development of a zirconia-toughened alumina ZTA-TiO2-Cr2O3 ceramic composite by means of microwave sintering at 2.45 GHz within the range 1200 �C�1400 �C, with a dwell time of 5�20 min. It is aimed at attaining improved microstructure and properties at a lower sintering temperature and shorter soaking time, compared to using a conventional heating method. Consequently, the effects of sintering temperature and soaking time on densification, properties and microstructural behaviour of the composite, are investigated. XRD analysis reveals that the microwave-sintered samples possess a higher crystallinity at a higher sintering temperature. Microstructural analysis confirms the uniform distribution of particles and controlled grain growth; with the lowest AGI value being 1.28 grains/?m. The sample that is microwave-sintered at 1350 �C with 10 min of soaking time achieves a high density (95.74% of the theoretical density), elevated hardness (1803.4 HV), and excellent fracture toughness (9.61 MPa m1/2), and intergranular cracks. This proves that the microwave sintering technique enhances densification, microstructural evolution and the properties of the ceramic composite at a lower temperature and shorter soaking time, compared to conventional heating. Overall, the improved mechanical properties of the microwave-sintered ceramics, compared to conventionally-sintered ceramics, are attributed to the enhanced densification and finer and more homogeneous microstructure that is achieved through the use of a microwave sintering method. The results reveal that microwave sintering is effective in improving the microstructure and density of materials, and will be useful for enhancing the mechanical properties of ZTA-TiO2-Cr2O3 ceramic composites. � 2017 Elsevier B.V.en_US
dc.description.natureFinalen_US
dc.identifier.doi10.1016/j.jallcom.2017.06.115
dc.identifier.epage466
dc.identifier.scopus2-s2.0-85020789047
dc.identifier.spage458
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85020789047&doi=10.1016%2fj.jallcom.2017.06.115&partnerID=40&md5=1884b75230f20e888ac4a6d645080bb3
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/23439
dc.identifier.volume722
dc.publisherElsevier Ltden_US
dc.sourceScopus
dc.sourcetitleJournal of Alloys and Compounds
dc.titleMicrowave sintering of zirconia-toughened alumina (ZTA)-TiO2-Cr2O3 ceramic composite: The effects on microstructure and propertiesen_US
dc.typeArticleen_US
dspace.entity.typePublication
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