Effect of zirconia and chromia on the mechanical and tribology properties of alumina cutting tool

Due to their excellent hardness, high abrasion resistance and chemical stability, alumina based cutting tools are suitable for the high speed machining, which contributed to the high productivity. The properties of high hot hardness play significantly roles to perform in dry machining which further...

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Main Author:	Abdul Manap, Muhamad Naim Fahmi
Format:	Thesis
Language:	English English
Published:	2021
Subjects:	T Technology (General) TJ Mechanical engineering and machinery
Online Access:	http://eprints.utem.edu.my/id/eprint/26068/1/Effect%20of%20zirconia%20and%20chromia%20on%20the%20mechanical%20and%20tribology%20properties%20of%20alumina%20cutting%20tool.pdf http://eprints.utem.edu.my/id/eprint/26068/2/Effect%20of%20zirconia%20and%20chromia%20on%20the%20mechanical%20and%20tribology%20properties%20of%20alumina%20cutting%20tool.pdf
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spelling	my-utem-ep.260682023-01-18T16:40:00Z Effect of zirconia and chromia on the mechanical and tribology properties of alumina cutting tool 2021 Abdul Manap, Muhamad Naim Fahmi T Technology (General) TJ Mechanical engineering and machinery Due to their excellent hardness, high abrasion resistance and chemical stability, alumina based cutting tools are suitable for the high speed machining, which contributed to the high productivity. The properties of high hot hardness play significantly roles to perform in dry machining which further reduce operational cost. However, at some extent, alumina are prone to catastrophic failure, sudden breakage and thermal shocks due to brittle structure. Therefore, alteration of alumina composition with addition of Zirconia and Chromia is proposed to improve fracture toughness and wear resistance. In this research, the effect Zirconia and Chromia addition on the dimension accuracy, mechanical properties, tribology and wear performance were investigated. The study started with the mixture of Alumina-Zirconia with up to 25 wt% Zirconia content. These compositions were blended using ball mill, compacted using hydraulic and Cold Isostatic Press (CIP) and sintered at constant parameters. The mechanical properties of sintered Alumina-Zirconia were evaluated based on the dimension accuracy, density and hardness. The composition with maximum hardness was selected to be further composed with Chromia in range of 0.2-0.8 wt%. The result show that composition of Alumina–zirconia with ration 80-20 wt% presented maximum hardness of 70.07 HRC. With the addition of 0.6 wt% Chromia, the hardness was increased to 71.03 HRC. Further, composition that demonstrated highest hardness, which is Alumina-Zirconia-Chromia with the ratio of 80-20-0.6 wt% have been selected for machining tests. Machining trials with AISI 1045 carbon steel shows that Alumina-Zirconia-Chromia demonstrated maximum 360s tool life, which is 33.33% better that Alumina-Zirconia cutting tool. Wear mechanisme for both cutting tools dominated by the chipping, abrasive, built-up edge and built-up layer. Analysis shows that the addition of Chromia expanded Alumina particles and changed the overal grains distribution into bimodal structure. This provided Zirconia particles that infliltrated between Alumina particles interlocked overal structure, which facilitated into higher deformation resistance into overall structure. As potential application, cutting tool of Alumina-Zirconia-Chromia developed in this study suitable in machining low carbon steel up to 200 m/min cutting speed. 2021 Thesis http://eprints.utem.edu.my/id/eprint/26068/ http://eprints.utem.edu.my/id/eprint/26068/1/Effect%20of%20zirconia%20and%20chromia%20on%20the%20mechanical%20and%20tribology%20properties%20of%20alumina%20cutting%20tool.pdf text en public http://eprints.utem.edu.my/id/eprint/26068/2/Effect%20of%20zirconia%20and%20chromia%20on%20the%20mechanical%20and%20tribology%20properties%20of%20alumina%20cutting%20tool.pdf text en validuser https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=121170 mphil masters Universiti Teknikal Malaysia Melaka Faculty of Manufacturing Engineering Abu Bakar, Mohd Hadzley
institution	Universiti Teknikal Malaysia Melaka
collection	UTeM Repository
language	English English
advisor	Abu Bakar, Mohd Hadzley
topic	T Technology (General) TJ Mechanical engineering and machinery
spellingShingle	T Technology (General) TJ Mechanical engineering and machinery Abdul Manap, Muhamad Naim Fahmi Effect of zirconia and chromia on the mechanical and tribology properties of alumina cutting tool
description	Due to their excellent hardness, high abrasion resistance and chemical stability, alumina based cutting tools are suitable for the high speed machining, which contributed to the high productivity. The properties of high hot hardness play significantly roles to perform in dry machining which further reduce operational cost. However, at some extent, alumina are prone to catastrophic failure, sudden breakage and thermal shocks due to brittle structure. Therefore, alteration of alumina composition with addition of Zirconia and Chromia is proposed to improve fracture toughness and wear resistance. In this research, the effect Zirconia and Chromia addition on the dimension accuracy, mechanical properties, tribology and wear performance were investigated. The study started with the mixture of Alumina-Zirconia with up to 25 wt% Zirconia content. These compositions were blended using ball mill, compacted using hydraulic and Cold Isostatic Press (CIP) and sintered at constant parameters. The mechanical properties of sintered Alumina-Zirconia were evaluated based on the dimension accuracy, density and hardness. The composition with maximum hardness was selected to be further composed with Chromia in range of 0.2-0.8 wt%. The result show that composition of Alumina–zirconia with ration 80-20 wt% presented maximum hardness of 70.07 HRC. With the addition of 0.6 wt% Chromia, the hardness was increased to 71.03 HRC. Further, composition that demonstrated highest hardness, which is Alumina-Zirconia-Chromia with the ratio of 80-20-0.6 wt% have been selected for machining tests. Machining trials with AISI 1045 carbon steel shows that Alumina-Zirconia-Chromia demonstrated maximum 360s tool life, which is 33.33% better that Alumina-Zirconia cutting tool. Wear mechanisme for both cutting tools dominated by the chipping, abrasive, built-up edge and built-up layer. Analysis shows that the addition of Chromia expanded Alumina particles and changed the overal grains distribution into bimodal structure. This provided Zirconia particles that infliltrated between Alumina particles interlocked overal structure, which facilitated into higher deformation resistance into overall structure. As potential application, cutting tool of Alumina-Zirconia-Chromia developed in this study suitable in machining low carbon steel up to 200 m/min cutting speed.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Abdul Manap, Muhamad Naim Fahmi
author_facet	Abdul Manap, Muhamad Naim Fahmi
author_sort	Abdul Manap, Muhamad Naim Fahmi
title	Effect of zirconia and chromia on the mechanical and tribology properties of alumina cutting tool
title_short	Effect of zirconia and chromia on the mechanical and tribology properties of alumina cutting tool
title_full	Effect of zirconia and chromia on the mechanical and tribology properties of alumina cutting tool
title_fullStr	Effect of zirconia and chromia on the mechanical and tribology properties of alumina cutting tool
title_full_unstemmed	Effect of zirconia and chromia on the mechanical and tribology properties of alumina cutting tool
title_sort	effect of zirconia and chromia on the mechanical and tribology properties of alumina cutting tool
granting_institution	Universiti Teknikal Malaysia Melaka
granting_department	Faculty of Manufacturing Engineering
publishDate	2021
url	http://eprints.utem.edu.my/id/eprint/26068/1/Effect%20of%20zirconia%20and%20chromia%20on%20the%20mechanical%20and%20tribology%20properties%20of%20alumina%20cutting%20tool.pdf http://eprints.utem.edu.my/id/eprint/26068/2/Effect%20of%20zirconia%20and%20chromia%20on%20the%20mechanical%20and%20tribology%20properties%20of%20alumina%20cutting%20tool.pdf
_version_	1776103131282669568

Effect of zirconia and chromia on the mechanical and tribology properties of alumina cutting tool

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