Effect of oxide additives and particle size on stabilization of treated commercial zirconia |
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Authors: | Maham Yasmeen Syed Asif Ansar Amir Azam Khan Thierry Joyeux Jean Claude Labbe |
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Affiliation: | (1) Faculty of Metallurgy and Materials Engineering, GIK Institute of Engineering Sciences and Technology, Topi, 23460 Swabi, Pakistan;(2) Science des Procédés Céramiques et Traitements de Surface (SPCTS), Université de Limoges, 87060 Limoges Cedex, France |
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Abstract: | Commercial zirconia was milled and sedimented to separate finer and coarser particles. Then additives such as CaO and Y2O3 were added in proportions of 7 and 13 mol.% each. Wet mixing of these powders was done in the ball mill. These mixtures were then compacted through uniaxial compaction using 150 MPa of pressure to make pellets of 8 mm diameter and 3 mm height approximately. The compacts were sintered at 1700 °C under argon atmosphere during 1 h. Densification calculations revealed densities of more than 80% in all samples. Scanning electron microscopy (SEM) showed that closed porosity was present. X-ray diffraction (XRD) results confirmed the presence of cubic phase with quantities higher in samples of finer powder and 13 mol.% additive. |
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Keywords: | oxide additives sintering stabilization zirconia |
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