Microwave sintering of zirconia-toughened alumina (ZTA)-TiO2-Cr2O3 ceramic composite: The effects on microstructure and properties
Alumina; 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 microstru...
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Elsevier Ltd
2023
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| author | Manshor H. Abdullah E.C. Azhar A.Z.A. Sing Y.W. Ahmad Z.A. |
| author2 | 55490332600 |
| author_facet | 55490332600 Manshor H. Abdullah E.C. Azhar A.Z.A. Sing Y.W. Ahmad Z.A. |
| author_sort | Manshor H. |
| building | UNITEN Library |
| collection | Institutional Repository |
| content_provider | Universiti Tenaga Nasional |
| content_source | UNITEN Institutional Repository |
| continent | Asia |
| country | Malaysia |
| description | Alumina; 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; Sintering |
| format | Article |
| id | my.uniten.dspace-23439 |
| institution | Universiti Tenaga Nasional |
| publishDate | 2023 |
| publisher | Elsevier Ltd |
| record_format | dspace |
| spelling | my.uniten.dspace-234392023-05-29T14:40:30Z Microwave sintering of zirconia-toughened alumina (ZTA)-TiO2-Cr2O3 ceramic composite: The effects on microstructure and properties Manshor H. Abdullah E.C. Azhar A.Z.A. Sing Y.W. Ahmad Z.A. 55490332600 23391987100 25958888500 12775149200 56036883500 Alumina; 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; Sintering This 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. Final 2023-05-29T06:40:30Z 2023-05-29T06:40:30Z 2017 Article 10.1016/j.jallcom.2017.06.115 2-s2.0-85020789047 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85020789047&doi=10.1016%2fj.jallcom.2017.06.115&partnerID=40&md5=1884b75230f20e888ac4a6d645080bb3 https://irepository.uniten.edu.my/handle/123456789/23439 722 458 466 Elsevier Ltd Scopus |
| spellingShingle | Manshor H. Abdullah E.C. Azhar A.Z.A. Sing Y.W. Ahmad Z.A. Microwave sintering of zirconia-toughened alumina (ZTA)-TiO2-Cr2O3 ceramic composite: The effects on microstructure and properties |
| title | Microwave sintering of zirconia-toughened alumina (ZTA)-TiO2-Cr2O3 ceramic composite: The effects on microstructure and properties |
| title_full | Microwave sintering of zirconia-toughened alumina (ZTA)-TiO2-Cr2O3 ceramic composite: The effects on microstructure and properties |
| title_fullStr | Microwave sintering of zirconia-toughened alumina (ZTA)-TiO2-Cr2O3 ceramic composite: The effects on microstructure and properties |
| title_full_unstemmed | Microwave sintering of zirconia-toughened alumina (ZTA)-TiO2-Cr2O3 ceramic composite: The effects on microstructure and properties |
| title_short | Microwave sintering of zirconia-toughened alumina (ZTA)-TiO2-Cr2O3 ceramic composite: The effects on microstructure and properties |
| title_sort | microwave sintering of zirconia-toughened alumina (zta)-tio2-cr2o3 ceramic composite: the effects on microstructure and properties |
| url_provider | http://dspace.uniten.edu.my/ |