The effect of dolomite addition onto the phases and hardness of zirconia toughened alumina

Ahmad Azhar, Ahmad Zahirani and Mohd Rosli, Muhammad Farhan and Manshor, Hanisah and Mohd Ali, Afifah (2019) The effect of dolomite addition onto the phases and hardness of zirconia toughened alumina. In: International Conference on X-Rays and Related Techniques in Research and Industry 2018, ICXRI 2018, 18 - 19 August 2018, Grand Riverview Hotel Kota Bharu, Kelantan; Malaysia.

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Abstract

Zirconia toughened alumina (ZTA) is one of the composite ceramics that are widely use in load bearing and wear resistant applications. The composite is known for their good hardness and toughness, due to the presence of both Al2O3 and yttria stabilized zirconia (YSZ). The enhance toughness for ZTA are mostly originated from the presence of YSZ in the composite. The phase transformation from tetragonal to monoclinic that happen inside of YSZ during the presence of stress and increase its toughness. Thus, the amount of tetragonal and monoclinic phase inside of YSZ are critital to its toughness. In this research, the amount of dolomite was varied from 0 to 1.0 wt % while ratio of Al2O3 to YSZ were fixed to 4:1. The sample were prepared through the solid-state sintering method. XRD was done onto the sample to analyze the phases. XRD analysis shows that no presence of new compound in ZTA system. With addition 0.3 wt% of dolomite, Vickers hardness reached maximum of 1842.75HV.

Item Type:	Conference or Workshop Item (Plenary Papers)
Additional Information:	6954/73221
Uncontrolled Keywords:	Dolomite addition; Phases and hardness of zirconia toughened alumina
Subjects:	T Technology > TJ Mechanical engineering and machinery
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Dr Ahmad Zahirani Ahmad Azhar
Date Deposited:	11 Jul 2019 11:04
Last Modified:	18 Jul 2019 16:18
URI:	http://irep.iium.edu.my/id/eprint/73221

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