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Investigation on Hardness and Corrosion Properties of Graphene Nanoplatelets Reinforced Magnesium Composite

Magnesium (Mg) has been used for many decades in various applications. This metal has attractive mechanical properties such as strength and hardness. Although Mg is lightweight and has high strength, one of the major limiting factors in using Mg includes its corrosion resistance. In the natural envi...

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Main Author: Abang Mohamad Harith, Beniamin
Format: Thesis
Language:English
English
English
Published: Universiti Malaysia Sarawak 2023
Subjects:
TJ Mechanical engineering and machinery
TN Mining engineering. Metallurgy
Online Access:http://ir.unimas.my/id/eprint/43248/3/Abg%20M.%20Harith_dsva.pdf
http://ir.unimas.my/id/eprint/43248/5/Thesis%20MEng_Abang%20Mohamad%20Harith%20Abang%20Beniamin%20-%2024%20pages.pdf
http://ir.unimas.my/id/eprint/43248/8/Thesis%20MEng_Abang%20Mohamad%20Harith%20Abang%20Beniamin.ftext.pdf
http://ir.unimas.my/id/eprint/43248/
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spelling my.unimas.ir.432482024-08-13T02:31:56Z http://ir.unimas.my/id/eprint/43248/ Investigation on Hardness and Corrosion Properties of Graphene Nanoplatelets Reinforced Magnesium Composite Abang Mohamad Harith, Beniamin TJ Mechanical engineering and machinery TN Mining engineering. Metallurgy Magnesium (Mg) has been used for many decades in various applications. This metal has attractive mechanical properties such as strength and hardness. Although Mg is lightweight and has high strength, one of the major limiting factors in using Mg includes its corrosion resistance. In the natural environment, the poor corrosion resistance of Mg and Mg alloys in saline and physiological environments remains a constant threat for Mg and Mg alloys as potential automotive parts, aerospace materials or biomedical implants. This research is done to study the hardness and corrosion properties of Mg and Mg-based composites. The hardness was determined using the Vickers microhardness test. Based on the results, Mg0.2%Mn%6%Zn-1% GNPs had the highest hardness at 48 HV, followed by Mg0.2%Mn%6%Zn-0.5% GNPs at 45 HV, Mg0.2%Mn%6%Zn at 44 HV, and HP Mg at 34 HV. Increasing GNP content with zinc and manganese reinforcement is important for improving hardness in sintered Mg-based GNPs composites. An immersion test on GNP-reinforced Mg composites showed that Mg0.2%Mn%6%Zn-1% GNPs had the highest corrosion resistance (PW=17.546mm/y), followed by Mg0.2%Mn%6%Zn-0.5% GNPs (PW=19.770mm/y), Mg0.2%Mn%6%Zn (PW=22.958mm/y), and HP Mg (PW=90.3146mm/y). GNPs also lowered the corrosion rate in saline solution. Corrosion morphology and type were determined by 3D optical microscope, SEM, and EDX. Overall, this study has managed to fabricate Mg-based composites using the powder metallurgy method. Adding GNP as reinforcement has increased hardness and corrosion properties significantly, thus proving the strengthening effect of corrosion resistance by GNPs in Mg-based composites. Universiti Malaysia Sarawak 2023-10-30 Thesis PeerReviewed text en http://ir.unimas.my/id/eprint/43248/3/Abg%20M.%20Harith_dsva.pdf text en http://ir.unimas.my/id/eprint/43248/5/Thesis%20MEng_Abang%20Mohamad%20Harith%20Abang%20Beniamin%20-%2024%20pages.pdf text en http://ir.unimas.my/id/eprint/43248/8/Thesis%20MEng_Abang%20Mohamad%20Harith%20Abang%20Beniamin.ftext.pdf Abang Mohamad Harith, Beniamin (2023) Investigation on Hardness and Corrosion Properties of Graphene Nanoplatelets Reinforced Magnesium Composite. Masters thesis, Universiti Malaysia Sarawak.
institution Universiti Malaysia Sarawak
building Centre for Academic Information Services (CAIS)
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sarawak
content_source UNIMAS Institutional Repository
url_provider http://ir.unimas.my/
language English
English
English
topic TJ Mechanical engineering and machinery
TN Mining engineering. Metallurgy
spellingShingle TJ Mechanical engineering and machinery
TN Mining engineering. Metallurgy
Abang Mohamad Harith, Beniamin
Investigation on Hardness and Corrosion Properties of Graphene Nanoplatelets Reinforced Magnesium Composite
description Magnesium (Mg) has been used for many decades in various applications. This metal has attractive mechanical properties such as strength and hardness. Although Mg is lightweight and has high strength, one of the major limiting factors in using Mg includes its corrosion resistance. In the natural environment, the poor corrosion resistance of Mg and Mg alloys in saline and physiological environments remains a constant threat for Mg and Mg alloys as potential automotive parts, aerospace materials or biomedical implants. This research is done to study the hardness and corrosion properties of Mg and Mg-based composites. The hardness was determined using the Vickers microhardness test. Based on the results, Mg0.2%Mn%6%Zn-1% GNPs had the highest hardness at 48 HV, followed by Mg0.2%Mn%6%Zn-0.5% GNPs at 45 HV, Mg0.2%Mn%6%Zn at 44 HV, and HP Mg at 34 HV. Increasing GNP content with zinc and manganese reinforcement is important for improving hardness in sintered Mg-based GNPs composites. An immersion test on GNP-reinforced Mg composites showed that Mg0.2%Mn%6%Zn-1% GNPs had the highest corrosion resistance (PW=17.546mm/y), followed by Mg0.2%Mn%6%Zn-0.5% GNPs (PW=19.770mm/y), Mg0.2%Mn%6%Zn (PW=22.958mm/y), and HP Mg (PW=90.3146mm/y). GNPs also lowered the corrosion rate in saline solution. Corrosion morphology and type were determined by 3D optical microscope, SEM, and EDX. Overall, this study has managed to fabricate Mg-based composites using the powder metallurgy method. Adding GNP as reinforcement has increased hardness and corrosion properties significantly, thus proving the strengthening effect of corrosion resistance by GNPs in Mg-based composites.
format Thesis
author Abang Mohamad Harith, Beniamin
author_facet Abang Mohamad Harith, Beniamin
author_sort Abang Mohamad Harith, Beniamin
title Investigation on Hardness and Corrosion Properties of Graphene Nanoplatelets Reinforced Magnesium Composite
title_short Investigation on Hardness and Corrosion Properties of Graphene Nanoplatelets Reinforced Magnesium Composite
title_full Investigation on Hardness and Corrosion Properties of Graphene Nanoplatelets Reinforced Magnesium Composite
title_fullStr Investigation on Hardness and Corrosion Properties of Graphene Nanoplatelets Reinforced Magnesium Composite
title_full_unstemmed Investigation on Hardness and Corrosion Properties of Graphene Nanoplatelets Reinforced Magnesium Composite
title_sort investigation on hardness and corrosion properties of graphene nanoplatelets reinforced magnesium composite
publisher Universiti Malaysia Sarawak
publishDate 2023
url http://ir.unimas.my/id/eprint/43248/3/Abg%20M.%20Harith_dsva.pdf
http://ir.unimas.my/id/eprint/43248/5/Thesis%20MEng_Abang%20Mohamad%20Harith%20Abang%20Beniamin%20-%2024%20pages.pdf
http://ir.unimas.my/id/eprint/43248/8/Thesis%20MEng_Abang%20Mohamad%20Harith%20Abang%20Beniamin.ftext.pdf
http://ir.unimas.my/id/eprint/43248/
_version_ 1808981495389356032
score 13.211869

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