Physical and wear properties of aluminium matrix composite reinforced with PSAC and slag fabricated via powder metallurgy

A study of physical and wear properties were carried out on pure aluminium reinforced with biomass by product such as palm shell activated carbon (PSAC), slag and PSAC/slag particles. Hybrid and unhybrid aluminium composites containing 5-20 wt.% of reinforcements were fabricated via powder metallurg...

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Main Author:	Zamri, Yusoff
Format:	Thesis
Language:	English
Subjects:	Powder metallurgy Aluminium composites Aluminium Abrasive wear Slag particles
Online Access:	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/31925/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/31925/2/Full%20text.pdf
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spelling	my-unimap-319252014-02-14T02:10:54Z Physical and wear properties of aluminium matrix composite reinforced with PSAC and slag fabricated via powder metallurgy Zamri, Yusoff A study of physical and wear properties were carried out on pure aluminium reinforced with biomass by product such as palm shell activated carbon (PSAC), slag and PSAC/slag particles. Hybrid and unhybrid aluminium composites containing 5-20 wt.% of reinforcements were fabricated via powder metallurgy. Physical properties of as-sintered specimen such as density, apparent porosity and macro-hardness are determined. The wear rate was measured by pin-ondisc technique while debris, worn and sub-surfaces have been analysed by using SEM and EDX. Dry sliding experiments were conducted in air at room temperature using a pin-on-disc self-built attached to polisher machine. The disc which acted as the mating surface material was made of mild steel. The influence of the applied load was investigated under a constant sliding velocity of 0.58 m/s with the applied loads at 3 N, 11 N and 51 N. Result appears that the slag/Al unhybrid composite had the highest values of bulk density and macrohardness. The PSAC/slag/Al hybrid composite gave intermediate values and the PSAC/Al unhybrid composite gave the lowest values. Porosity of PSAC/Al unhybrid composite was the highest, slag/Al unhybrid composite was lowest and PSAC/slag hybrid composite was the intermediate comparatively. Dry wear sliding showed the mass loss of composites relative to the aluminium was reduced significantly when the addition of reinforcement up to 20 wt.% slag for Al/slag composite, up to 15 wt.% PSAC/slag for hybrid composite and up to 10 wt.% PSAC for Al/PSAC composite. The wear resistance of Al/PSAC composites relative to the aluminium was improved significantly at a load up to 11 N but for Al/slag and Al/PSAC/slag composites relative to the aluminium was improved significantly at load up to 51 N. The cumulative wear rate of the PSAC/Al unhybrid composite decreased when the PSAC content less than 10 wt.% PSAC and increased when PSAC content more than 10 wt.%. The optimum content of PSAC was found to be 10 wt.% in order to achieve optimum wear resistance. The cumulative wear rate of the PSAC/slag/Al hybrid composite decreased when the PSAC/slag content less than 15 wt.% and increased when PSAC/slag content more than 15 wt.%. The optimum content of PSAC/slag was found to be 15 wt.% in order to achieve optimum wear resistance. The cumulative wear rate of the slag/Al unhybrid composite decreased drastically when the slag content less than 10 wt.%. SEM micrograph of 10 wt.% PSAC/Al composite showed carbon film smeared on the worn surface acting as self lubrication and improved wear resistance. However, SEM micrograph of 20 wt.% slag/Al composite showed the presence of fine debris as third body that acting as separator between specimen and mating surface. This third body reduced direct interaction and improved wear resistance. SEM micrograph of 7.5 wt.% PSAC/7.5 wt.% slag/Al hybrid composite showed discontinuous smear debris particles present at contact of wear surface and improved wear resistance. Universiti Malaysia Perlis (UniMAP) 2012 Thesis en http://dspace.unimap.edu.my:80/dspace/handle/123456789/31925 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/31925/1/Page%201-24.pdf 5b63b3b5f4db29fe7bf7894bae4a8974 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/31925/2/Full%20text.pdf c520444fa5768fb3fd3d547a0235dd6e http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/31925/3/license.txt 8a4605be74aa9ea9d79846c1fba20a33 Powder metallurgy Aluminium composites Aluminium Abrasive wear Slag particles School of Materials Engineering
institution	Universiti Malaysia Perlis
collection	UniMAP Institutional Repository
language	English
topic	Powder metallurgy Aluminium composites Aluminium Abrasive wear Slag particles
spellingShingle	Powder metallurgy Aluminium composites Aluminium Abrasive wear Slag particles Zamri, Yusoff Physical and wear properties of aluminium matrix composite reinforced with PSAC and slag fabricated via powder metallurgy
description	A study of physical and wear properties were carried out on pure aluminium reinforced with biomass by product such as palm shell activated carbon (PSAC), slag and PSAC/slag particles. Hybrid and unhybrid aluminium composites containing 5-20 wt.% of reinforcements were fabricated via powder metallurgy. Physical properties of as-sintered specimen such as density, apparent porosity and macro-hardness are determined. The wear rate was measured by pin-ondisc technique while debris, worn and sub-surfaces have been analysed by using SEM and EDX. Dry sliding experiments were conducted in air at room temperature using a pin-on-disc self-built attached to polisher machine. The disc which acted as the mating surface material was made of mild steel. The influence of the applied load was investigated under a constant sliding velocity of 0.58 m/s with the applied loads at 3 N, 11 N and 51 N. Result appears that the slag/Al unhybrid composite had the highest values of bulk density and macrohardness. The PSAC/slag/Al hybrid composite gave intermediate values and the PSAC/Al unhybrid composite gave the lowest values. Porosity of PSAC/Al unhybrid composite was the highest, slag/Al unhybrid composite was lowest and PSAC/slag hybrid composite was the intermediate comparatively. Dry wear sliding showed the mass loss of composites relative to the aluminium was reduced significantly when the addition of reinforcement up to 20 wt.% slag for Al/slag composite, up to 15 wt.% PSAC/slag for hybrid composite and up to 10 wt.% PSAC for Al/PSAC composite. The wear resistance of Al/PSAC composites relative to the aluminium was improved significantly at a load up to 11 N but for Al/slag and Al/PSAC/slag composites relative to the aluminium was improved significantly at load up to 51 N. The cumulative wear rate of the PSAC/Al unhybrid composite decreased when the PSAC content less than 10 wt.% PSAC and increased when PSAC content more than 10 wt.%. The optimum content of PSAC was found to be 10 wt.% in order to achieve optimum wear resistance. The cumulative wear rate of the PSAC/slag/Al hybrid composite decreased when the PSAC/slag content less than 15 wt.% and increased when PSAC/slag content more than 15 wt.%. The optimum content of PSAC/slag was found to be 15 wt.% in order to achieve optimum wear resistance. The cumulative wear rate of the slag/Al unhybrid composite decreased drastically when the slag content less than 10 wt.%. SEM micrograph of 10 wt.% PSAC/Al composite showed carbon film smeared on the worn surface acting as self lubrication and improved wear resistance. However, SEM micrograph of 20 wt.% slag/Al composite showed the presence of fine debris as third body that acting as separator between specimen and mating surface. This third body reduced direct interaction and improved wear resistance. SEM micrograph of 7.5 wt.% PSAC/7.5 wt.% slag/Al hybrid composite showed discontinuous smear debris particles present at contact of wear surface and improved wear resistance.
format	Thesis
author	Zamri, Yusoff
author_facet	Zamri, Yusoff
author_sort	Zamri, Yusoff
title	Physical and wear properties of aluminium matrix composite reinforced with PSAC and slag fabricated via powder metallurgy
title_short	Physical and wear properties of aluminium matrix composite reinforced with PSAC and slag fabricated via powder metallurgy
title_full	Physical and wear properties of aluminium matrix composite reinforced with PSAC and slag fabricated via powder metallurgy
title_fullStr	Physical and wear properties of aluminium matrix composite reinforced with PSAC and slag fabricated via powder metallurgy
title_full_unstemmed	Physical and wear properties of aluminium matrix composite reinforced with PSAC and slag fabricated via powder metallurgy
title_sort	physical and wear properties of aluminium matrix composite reinforced with psac and slag fabricated via powder metallurgy
granting_institution	Universiti Malaysia Perlis (UniMAP)
granting_department	School of Materials Engineering
url	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/31925/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/31925/2/Full%20text.pdf
_version_	1747836796885008384

Physical and wear properties of aluminium matrix composite reinforced with PSAC and slag fabricated via powder metallurgy

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