Development of powder metallurgy route for production of novel fe-al intermetallics for high temperature applications

FeAl based intelmetallic alloys are being proposed as engineering materials for high temperature applications due to their low density, low materials cost, low content of strategic elements and oxidation resistance. These intennetallic alloys are suitable for applications in aggressive and cor...

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Main Author:	Mat Noor, Fazimah
Format:	Thesis
Language:	English English English
Published:	2009
Subjects:	TN600-799 Metallurgy
Online Access:	http://eprints.uthm.edu.my/7317/1/24p%20FAZIMAH%20MAT%20NOOR.pdf http://eprints.uthm.edu.my/7317/2/FAZIMAH%20MAT%20NOOR%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/7317/3/FAZIMAH%20MAT%20NOOR%20WATERMARK.pdf
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spelling	my-uthm-ep.73172022-07-21T03:52:47Z Development of powder metallurgy route for production of novel fe-al intermetallics for high temperature applications 2009-03 Mat Noor, Fazimah TN600-799 Metallurgy FeAl based intelmetallic alloys are being proposed as engineering materials for high temperature applications due to their low density, low materials cost, low content of strategic elements and oxidation resistance. These intennetallic alloys are suitable for applications in aggressive and corrosive environments up to 900°C. However they may fail through loss of strength or gradually deteriorate through reaction with the surrounding atmosphere when exposed to temperature higher than 900°C. Therefore, the fonnation of a stable protective oxide scale or alumina on the surface is required to protect the underlying materials when exposed to high temperature. In this research, the FeAl alloys were produced by using powder metallurgy route which consisted of mechanical alloying process, cold compaction. sintering, hot compaction and surface treatment via ion implantation. The addition of reactive elements or their oxides such as Y, Y20 3 and Ce02 by mechanical alloying or ion implantation method may improve their oxidation resistance through the enhancement of the alumina scale adhesion to the underlying alloys. Characterizations by using SEM and XRD were carried out before and after each process to investigate the microstructure, phase change and fonnation of the oxide layer. Cyclic oxidation tests were perfonned at 900°C and 11 OO°C to study the oxidation behavior of these intennetallic alloys. The results showed that the FeAI intennetallic alloys were successfully produced by mechanical alloying, hot compaction and surface treatment via ion implantation. The FeAI intennetallic with 3 xl 015 ionlcm2 doses of yttrium implanted exhibited the lowest oxidation kinetics at 900°C while FeAI intennetaIIic with 1 wt% yttria and 9xl 0 15 ionlcm2 doses of yttrium implanted exhibited the lowest oxidation kinetics at 11 00°c. 2009-03 Thesis http://eprints.uthm.edu.my/7317/ http://eprints.uthm.edu.my/7317/1/24p%20FAZIMAH%20MAT%20NOOR.pdf text en public http://eprints.uthm.edu.my/7317/2/FAZIMAH%20MAT%20NOOR%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/7317/3/FAZIMAH%20MAT%20NOOR%20WATERMARK.pdf text en validuser mphil masters Universiti Tun Hussein Onn Malaysia Fakulti Kejuruteraan Mekanikal dan Pembuatan
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	TN600-799 Metallurgy
spellingShingle	TN600-799 Metallurgy Mat Noor, Fazimah Development of powder metallurgy route for production of novel fe-al intermetallics for high temperature applications
description	FeAl based intelmetallic alloys are being proposed as engineering materials for high temperature applications due to their low density, low materials cost, low content of strategic elements and oxidation resistance. These intennetallic alloys are suitable for applications in aggressive and corrosive environments up to 900°C. However they may fail through loss of strength or gradually deteriorate through reaction with the surrounding atmosphere when exposed to temperature higher than 900°C. Therefore, the fonnation of a stable protective oxide scale or alumina on the surface is required to protect the underlying materials when exposed to high temperature. In this research, the FeAl alloys were produced by using powder metallurgy route which consisted of mechanical alloying process, cold compaction. sintering, hot compaction and surface treatment via ion implantation. The addition of reactive elements or their oxides such as Y, Y20 3 and Ce02 by mechanical alloying or ion implantation method may improve their oxidation resistance through the enhancement of the alumina scale adhesion to the underlying alloys. Characterizations by using SEM and XRD were carried out before and after each process to investigate the microstructure, phase change and fonnation of the oxide layer. Cyclic oxidation tests were perfonned at 900°C and 11 OO°C to study the oxidation behavior of these intennetallic alloys. The results showed that the FeAI intennetallic alloys were successfully produced by mechanical alloying, hot compaction and surface treatment via ion implantation. The FeAI intennetallic with 3 xl 015 ionlcm2 doses of yttrium implanted exhibited the lowest oxidation kinetics at 900°C while FeAI intennetaIIic with 1 wt% yttria and 9xl 0 15 ionlcm2 doses of yttrium implanted exhibited the lowest oxidation kinetics at 11 00°c.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Mat Noor, Fazimah
author_facet	Mat Noor, Fazimah
author_sort	Mat Noor, Fazimah
title	Development of powder metallurgy route for production of novel fe-al intermetallics for high temperature applications
title_short	Development of powder metallurgy route for production of novel fe-al intermetallics for high temperature applications
title_full	Development of powder metallurgy route for production of novel fe-al intermetallics for high temperature applications
title_fullStr	Development of powder metallurgy route for production of novel fe-al intermetallics for high temperature applications
title_full_unstemmed	Development of powder metallurgy route for production of novel fe-al intermetallics for high temperature applications
title_sort	development of powder metallurgy route for production of novel fe-al intermetallics for high temperature applications
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Fakulti Kejuruteraan Mekanikal dan Pembuatan
publishDate	2009
url	http://eprints.uthm.edu.my/7317/1/24p%20FAZIMAH%20MAT%20NOOR.pdf http://eprints.uthm.edu.my/7317/2/FAZIMAH%20MAT%20NOOR%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/7317/3/FAZIMAH%20MAT%20NOOR%20WATERMARK.pdf
_version_	1747831129081118720

Development of powder metallurgy route for production of novel fe-al intermetallics for high temperature applications

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