Effects of Cr2O3 addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina added with TiO2 (ZTA–TiO2) ceramic composite

Increasing demand for stronger cutting tools has led to the development of several novel composites and other multi-phase ceramics with better properties, particularly high fracture toughness. Cr2O3 is used as new material additive in this study, as it has attracted attention due to the formation of...

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Main Authors:	Manshor, Hanisah, Ahmad Azhar, Ahmad Zahirani, Abd Rashid, Rashita, Sulaiman, Shazreen, Abdullah, Ezzat Chan, Ahmad, Zainal Arifin
Format:	Article
Language:	English English English
Published:	Elsevier Ltd. 2016
Subjects:	QC Physics
Online Access:	http://irep.iium.edu.my/52291/ http://irep.iium.edu.my/52291/ http://irep.iium.edu.my/52291/1/2016%20-%20Refractory%20Hard%20Materials%2C%20Shazreen.pdf http://irep.iium.edu.my/52291/7/52291_Effects%20of%20Cr2O3%20addition%20on%20the%20phase_SCOPUS.pdf http://irep.iium.edu.my/52291/8/52291_Effects%20of%20Cr2O3%20addition%20on%20the%20phase_WOS.pdf

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recordtype	eprints
spelling	iium-522912017-06-05T03:19:25Z http://irep.iium.edu.my/52291/ Effects of Cr2O3 addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina added with TiO2 (ZTA–TiO2) ceramic composite Manshor, Hanisah Ahmad Azhar, Ahmad Zahirani Abd Rashid, Rashita Sulaiman, Shazreen Abdullah, Ezzat Chan Ahmad, Zainal Arifin QC Physics Increasing demand for stronger cutting tools has led to the development of several novel composites and other multi-phase ceramics with better properties, particularly high fracture toughness. Cr2O3 is used as new material additive in this study, as it has attracted attention due to the formation of isovalent solid solution when added to Al2O3, contributing to improved fracture toughness. Thus, the aim of this study is to investigate the effects of the addition of Cr2O3 at a concentration of between 0.0 wt% to 1.0 wt% on the physical properties, microstructural features and phase of a ZTA-TiO2 ceramics composite. The samples were prepared by wet-mixing and uniaxial compaction, then sintered for 1 h at 1600 °C under pressureless conditions. The sintered samples were then identified in terms of their density, hardness, fracture toughness and crack propagation, and were then subjected to microstructural analysis by XRD and FESEM. It was discovered that with addition of 0.6 wt% of Cr2O3 to the composite, an optimum density of 4.0630 g/cm3, hardness of 1681 HV, and fracture toughness of 7.15 MPa.m1/2 were obtained. As a result of this addition, plate-like Al2O3 grains were observed, which caused cracks formed in the composite to spread in an inter-granular manner. This confirmed that the properties of ZTA–TiO2 ceramics composite were augmented by the addition of 0.6 wt% Cr2O3. Elsevier Ltd. 2016-12 Article PeerReviewed application/pdf en http://irep.iium.edu.my/52291/1/2016%20-%20Refractory%20Hard%20Materials%2C%20Shazreen.pdf application/pdf en http://irep.iium.edu.my/52291/7/52291_Effects%20of%20Cr2O3%20addition%20on%20the%20phase_SCOPUS.pdf application/pdf en http://irep.iium.edu.my/52291/8/52291_Effects%20of%20Cr2O3%20addition%20on%20the%20phase_WOS.pdf Manshor, Hanisah and Ahmad Azhar, Ahmad Zahirani and Abd Rashid, Rashita and Sulaiman, Shazreen and Abdullah, Ezzat Chan and Ahmad, Zainal Arifin (2016) Effects of Cr2O3 addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina added with TiO2 (ZTA–TiO2) ceramic composite. International Journal of Refractory Metals and Hard Materials, 61. pp. 40-45. ISSN 0263-4368 http://www.sciencedirect.com/science/article/pii/S0263436816301652
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English English
topic	QC Physics
spellingShingle	QC Physics Manshor, Hanisah Ahmad Azhar, Ahmad Zahirani Abd Rashid, Rashita Sulaiman, Shazreen Abdullah, Ezzat Chan Ahmad, Zainal Arifin Effects of Cr2O3 addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina added with TiO2 (ZTA–TiO2) ceramic composite
description	Increasing demand for stronger cutting tools has led to the development of several novel composites and other multi-phase ceramics with better properties, particularly high fracture toughness. Cr2O3 is used as new material additive in this study, as it has attracted attention due to the formation of isovalent solid solution when added to Al2O3, contributing to improved fracture toughness. Thus, the aim of this study is to investigate the effects of the addition of Cr2O3 at a concentration of between 0.0 wt% to 1.0 wt% on the physical properties, microstructural features and phase of a ZTA-TiO2 ceramics composite. The samples were prepared by wet-mixing and uniaxial compaction, then sintered for 1 h at 1600 °C under pressureless conditions. The sintered samples were then identified in terms of their density, hardness, fracture toughness and crack propagation, and were then subjected to microstructural analysis by XRD and FESEM. It was discovered that with addition of 0.6 wt% of Cr2O3 to the composite, an optimum density of 4.0630 g/cm3, hardness of 1681 HV, and fracture toughness of 7.15 MPa.m1/2 were obtained. As a result of this addition, plate-like Al2O3 grains were observed, which caused cracks formed in the composite to spread in an inter-granular manner. This confirmed that the properties of ZTA–TiO2 ceramics composite were augmented by the addition of 0.6 wt% Cr2O3.
format	Article
author	Manshor, Hanisah Ahmad Azhar, Ahmad Zahirani Abd Rashid, Rashita Sulaiman, Shazreen Abdullah, Ezzat Chan Ahmad, Zainal Arifin
author_facet	Manshor, Hanisah Ahmad Azhar, Ahmad Zahirani Abd Rashid, Rashita Sulaiman, Shazreen Abdullah, Ezzat Chan Ahmad, Zainal Arifin
author_sort	Manshor, Hanisah
title	Effects of Cr2O3 addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina added with TiO2 (ZTA–TiO2) ceramic composite
title_short	Effects of Cr2O3 addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina added with TiO2 (ZTA–TiO2) ceramic composite
title_full	Effects of Cr2O3 addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina added with TiO2 (ZTA–TiO2) ceramic composite
title_fullStr	Effects of Cr2O3 addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina added with TiO2 (ZTA–TiO2) ceramic composite
title_full_unstemmed	Effects of Cr2O3 addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina added with TiO2 (ZTA–TiO2) ceramic composite
title_sort	effects of cr2o3 addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina added with tio2 (zta–tio2) ceramic composite
publisher	Elsevier Ltd.
publishDate	2016
url	http://irep.iium.edu.my/52291/ http://irep.iium.edu.my/52291/ http://irep.iium.edu.my/52291/1/2016%20-%20Refractory%20Hard%20Materials%2C%20Shazreen.pdf http://irep.iium.edu.my/52291/7/52291_Effects%20of%20Cr2O3%20addition%20on%20the%20phase_SCOPUS.pdf http://irep.iium.edu.my/52291/8/52291_Effects%20of%20Cr2O3%20addition%20on%20the%20phase_WOS.pdf
first_indexed	2023-09-18T21:14:06Z
last_indexed	2023-09-18T21:14:06Z
_version_	1777411446735372288

Effects of Cr2O3 addition on the phase, mechanical properties, and microstructure of zirconia-toughened alumina added with TiO2 (ZTA–TiO2) ceramic composite

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