Examining the impact of MnO2 and CeO2 on Mechanical Properties, Degradability, and the Microstructure of Zirconia
R. Dinesh1, S. Meenaloshini2, G. Mohsen3, U. Sankar4
1Dinesh Ragurajan, PhD Department of Mechanical Engineering, Universiti Tenaga Nasional, Malaysia.
2Dr Meenaloshini Satgunam, Head of Unit, Student-Staff Affairs, Department of Mechanical Engineering, UNITEN, Malaysia.
3Umma Sankar Gunasegaran, Department of Mechanical Engineering, Tunku Abdul Rahman University College, Malaysia.
Manuscript received on 09 June 2019 | Revised Manuscript received on 14 June 2019 | Manuscript Published on 08 July 2019 | PP: 574-577 | Volume-8 Issue-8S3 June 2019 | Retrieval Number: H11300688S319/19©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open-access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The effect of CeO2 and MnO2 additions (up to 1 wt%) on the sintering behaviour of yttria-stabilized zirconia sintered from 1250ºC to 1450ºC was investigated. From the findings, mechanical properties are likely to improve via the addition of 0.2 wt% CeO2 and 0.8 wt% MnO2 with Y-TZP. This composition increased the density of Y-TZP. The value of density achieved was about 6.04 g/cm3, approximately 98% of the theoretical density of Y-TZP. The mechanical properties (i.e. hardness and strength) of the material were significantly increased as well. Besides that, the 0.2 wt% CeO2 and 0.8 wt% MnO2 composite displayed higher elasticity of 211 GPa compared to pure Y-TZP with a theoretical value of 200 GPa. Sintering over 1450 ºC is expected to degenerate the composite’s physical and mechanical properties. Sintering at higher temperatures (>1350 °C) would affect the properties of the composite, due to a bigger grain size obtained at high temperature.
Keywords: CeO2, MnO2, Microstructure, Degradation
Scope of the Article: Mechanical Maintenance