The feasibility of quarry dust powder suspension for surface modification of tungsten carbide cobalt

Among composite materials, tungsten carbide cobalt (WC-Co) has a huge application in the industrial sector, especially in the mould and die industry. However, those mould and die material will wear out after some service time. Considering the hardness and high cost of WC-Co, most industries decided...

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Main Author:	Yap, Ching Yee
Format:	Thesis
Language:	English English
Published:	2021
Subjects:	T Technology (General)
Online Access:	http://eprints.utem.edu.my/id/eprint/26052/1/The%20feasibility%20of%20quarry%20dust%20powder%20suspension%20for%20surface%20modification%20of%20tungsten%20carbide%20cobalt.pdf http://eprints.utem.edu.my/id/eprint/26052/2/The%20feasibility%20of%20quarry%20dust%20powder%20suspension%20for%20surface%20modification%20of%20tungsten%20carbide%20cobalt.pdf
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spelling	my-utem-ep.260522022-09-29T12:35:50Z The feasibility of quarry dust powder suspension for surface modification of tungsten carbide cobalt 2021 Yap, Ching Yee T Technology (General) TA Engineering (General). Civil engineering (General) Among composite materials, tungsten carbide cobalt (WC-Co) has a huge application in the industrial sector, especially in the mould and die industry. However, those mould and die material will wear out after some service time. Considering the hardness and high cost of WC-Co, most industries decided to dispose and buy new moulds and dies rather than repair them after wear. Thus, the surface modification of WC-Co is necessary to increase its lifespan and service time. In this study, the surface modification of WC-Co was done by using the electrical discharge coating (EDC) with quarry dust suspension. Before the experiment, the characteristic of quarry dust was investigated, which included the element composition and chemical compound, particle size and surface morphology. A Sodick AQ35L die-sinker EDM machine was used to conduct the EDC process. The effect of coating parameters (peak current (Ip) and pulse on time (Ton)) on the surface roughness, Vickers micro-hardness and layer thickness were investigated. A Respond Surface Methodology (RSM) matrix created by Minitab software was used to determine the parameter effects and the optimum parameters of this research. The quarry dust in different concentrations were compared and their effect to the characteristics of coated surface were also determined. The results show that the optimum parameters to achieve a hard surface, thick coating layer and low value of surface roughness were found to be at Ip = 4 A and Ton = 341 μs. Besides, the best coated surface finish without the micropores and microcracks can be obtained by using 10 g/l of quarry dust powder. Coating layer thickness was strongly affected by the quarry dust concentration. These results demonstrated the capability of reusing and recycling quarry dust as an environmental friendly coating material for surface modification of tungsten carbide cobalt (WC-Co) by using EDC process. 2021 Thesis http://eprints.utem.edu.my/id/eprint/26052/ http://eprints.utem.edu.my/id/eprint/26052/1/The%20feasibility%20of%20quarry%20dust%20powder%20suspension%20for%20surface%20modification%20of%20tungsten%20carbide%20cobalt.pdf text en public http://eprints.utem.edu.my/id/eprint/26052/2/The%20feasibility%20of%20quarry%20dust%20powder%20suspension%20for%20surface%20modification%20of%20tungsten%20carbide%20cobalt.pdf text en validuser https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=121232 mphil masters Universiti Teknikal Malaysia Melaka Faculty of Manufacturing Engineering Liew, Pay Jun
institution	Universiti Teknikal Malaysia Melaka
collection	UTeM Repository
language	English English
advisor	Liew, Pay Jun
topic	T Technology (General) T Technology (General)
spellingShingle	T Technology (General) T Technology (General) Yap, Ching Yee The feasibility of quarry dust powder suspension for surface modification of tungsten carbide cobalt
description	Among composite materials, tungsten carbide cobalt (WC-Co) has a huge application in the industrial sector, especially in the mould and die industry. However, those mould and die material will wear out after some service time. Considering the hardness and high cost of WC-Co, most industries decided to dispose and buy new moulds and dies rather than repair them after wear. Thus, the surface modification of WC-Co is necessary to increase its lifespan and service time. In this study, the surface modification of WC-Co was done by using the electrical discharge coating (EDC) with quarry dust suspension. Before the experiment, the characteristic of quarry dust was investigated, which included the element composition and chemical compound, particle size and surface morphology. A Sodick AQ35L die-sinker EDM machine was used to conduct the EDC process. The effect of coating parameters (peak current (Ip) and pulse on time (Ton)) on the surface roughness, Vickers micro-hardness and layer thickness were investigated. A Respond Surface Methodology (RSM) matrix created by Minitab software was used to determine the parameter effects and the optimum parameters of this research. The quarry dust in different concentrations were compared and their effect to the characteristics of coated surface were also determined. The results show that the optimum parameters to achieve a hard surface, thick coating layer and low value of surface roughness were found to be at Ip = 4 A and Ton = 341 μs. Besides, the best coated surface finish without the micropores and microcracks can be obtained by using 10 g/l of quarry dust powder. Coating layer thickness was strongly affected by the quarry dust concentration. These results demonstrated the capability of reusing and recycling quarry dust as an environmental friendly coating material for surface modification of tungsten carbide cobalt (WC-Co) by using EDC process.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Yap, Ching Yee
author_facet	Yap, Ching Yee
author_sort	Yap, Ching Yee
title	The feasibility of quarry dust powder suspension for surface modification of tungsten carbide cobalt
title_short	The feasibility of quarry dust powder suspension for surface modification of tungsten carbide cobalt
title_full	The feasibility of quarry dust powder suspension for surface modification of tungsten carbide cobalt
title_fullStr	The feasibility of quarry dust powder suspension for surface modification of tungsten carbide cobalt
title_full_unstemmed	The feasibility of quarry dust powder suspension for surface modification of tungsten carbide cobalt
title_sort	feasibility of quarry dust powder suspension for surface modification of tungsten carbide cobalt
granting_institution	Universiti Teknikal Malaysia Melaka
granting_department	Faculty of Manufacturing Engineering
publishDate	2021
url	http://eprints.utem.edu.my/id/eprint/26052/1/The%20feasibility%20of%20quarry%20dust%20powder%20suspension%20for%20surface%20modification%20of%20tungsten%20carbide%20cobalt.pdf http://eprints.utem.edu.my/id/eprint/26052/2/The%20feasibility%20of%20quarry%20dust%20powder%20suspension%20for%20surface%20modification%20of%20tungsten%20carbide%20cobalt.pdf
_version_	1747834162243436544

The feasibility of quarry dust powder suspension for surface modification of tungsten carbide cobalt

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