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Microstructure and physical characterization of alumina-sintered body via hot isostatic pressing

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Abstract

Hot isostatic pressing technique is one of the alternative fabrication processes that have been used to enhance the densification rate in ceramic processing. The aim of this paper is to observe the microstructure and determine the physical and mechanical characterization of alumina ceramic pellets sintered via conventional technique compared to hot isostatic pressing. The semidry alumina ceramic pellets obtained from uniaxially pressing were dried in an oven earlier before sintering via two different techniques. The microstructure of alumina ceramic pellets analyzed by scanning electron microscopy that showed the pellet with particle size (25 μm) and sintered via hot isostatic pressing had larger uniform grain shape and size (16.25 μm), lowest porosity (20.76%), highest bulk density (3.60 g cm−3), low top (2.87%) and bottom (2.68%) shrinkage, and highest hardness (871.56 Hv). The optimum particle size of alumina and sintering technique (HIP) improved the microstructure and physical characterization of ceramic pellets.

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Funding

This work was financially supported by the Manufacturing and Materials Centre (AMMC), Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, under the Transdisciplinary Research Grant Scheme (TRGS Vot T001), Post Doc Grant (D005), and Ministry of Higher Education Malaysia (MOHE).

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Authors and Affiliations

  1. Advanced Manufacturing and Materials Centre (AMMC), Institute of Intergrated Engineering, Universiti Tun Hussein Onn Malaysia, 86400, Parit Raja, Johor, Malaysia

    Siti Salwa Alias, Zawati Harun & Nur Farhani Ismail

  2. Department of Materials and Design Engineering, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400, Parit Raja, Johor, Malaysia

    Zawati Harun & Nur Farhani Ismail

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  1. Siti Salwa Alias
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  2. Zawati Harun
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  3. Nur Farhani Ismail
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Correspondence to Zawati Harun.

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Alias, S.S., Harun, Z. & Ismail, N.F. Microstructure and physical characterization of alumina-sintered body via hot isostatic pressing. J Aust Ceram Soc 55, 969–975 (2019). https://doi.org/10.1007/s41779-019-00308-8

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