High temperature oxidation behaviour of nanocrystalline Fe80Cr20 alloys and ferritic steel implanted with lanthanum and titanium
Fe-Cr alloys and ferritic steel have received considerable attention as Solid Oxide Fuel Cell (SOFC) interconnects material. However, the main problem with the use of Fe-Cr alloys and ferritic steels as interconnect materials is their inadequate high temperature oxidation resistance. Chromium...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English English English |
| Published: |
2011
|
| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/2623/1/24p%20HENDI%20SARYANTO.pdf http://eprints.uthm.edu.my/2623/2/HENDI%20SARYANTO%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/2623/3/HENDI%20SARYANTO%20WATERMARK.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| id |
my-uthm-ep.2623 |
|---|---|
| record_format |
uketd_dc |
| spelling |
my-uthm-ep.26232021-11-01T03:27:51Z High temperature oxidation behaviour of nanocrystalline Fe80Cr20 alloys and ferritic steel implanted with lanthanum and titanium 2011-10 Saryanto, Hendi TA Engineering (General). Civil engineering (General) TA401-492 Materials of engineering and construction. Mechanics of materials Fe-Cr alloys and ferritic steel have received considerable attention as Solid Oxide Fuel Cell (SOFC) interconnects material. However, the main problem with the use of Fe-Cr alloys and ferritic steels as interconnect materials is their inadequate high temperature oxidation resistance. Chromium dioxide as the protective layers becomes non protective, due to formation of crack and volatile Cr2O3 upon exposure at high temperature oxidation. The prepared Fe80Cr20 alloy with smallest crystallite size expected to develop a protective film of Cr2O3 scales. On other hand, surface treatment via ion implantation technique can improve the oxidation resistance of alloys. Therefore, the purpose of this study is to investigate the oxidation resistance of implanted and unimplanted Fe80Cr20 alloy and available commercial ferritic steel in normal atmosphere over the temperature range of 1173-1373 K. Nanocrystalline Fe80Cr20 alloys have been produced by mechanical alloying process followed by hot compaction process. Lanthanum and titanium dopant were implanted into substrate of specimens with ion doses of 1x10 17 2 ions/cm . Implanted and unimplanted of specimens were subjected to oxidation at 1173 K, 1273 K, and 1373 K for 100 h. Morphology characterization of oxide scales of specimens were investigated by XRay Diffraction (XRD) and Scanning Electron Microscope (SEM) coupled with Energy Dispersive X-Ray analysis (EDX). The results shows that Fe80Cr20 60 h as the smallest crystallite size exhibit better oxidation resistance. The results also indicates that the implantation of lanthanum dopant effectively reduce the growth of oxide scale as well as increases the oxidation resistance. 2011-10 Thesis http://eprints.uthm.edu.my/2623/ http://eprints.uthm.edu.my/2623/1/24p%20HENDI%20SARYANTO.pdf text en public http://eprints.uthm.edu.my/2623/2/HENDI%20SARYANTO%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/2623/3/HENDI%20SARYANTO%20WATERMARK.pdf text en validuser mphil masters Universiti Tun Hussein Malaysia Fakulti Kejuruteraan Mekanikal dan Pembuatan |
| institution |
Universiti Tun Hussein Onn Malaysia |
| collection |
UTHM Institutional Repository |
| language |
English English English |
| topic |
TA Engineering (General) Civil engineering (General) TA Engineering (General) Civil engineering (General) |
| spellingShingle |
TA Engineering (General) Civil engineering (General) TA Engineering (General) Civil engineering (General) Saryanto, Hendi High temperature oxidation behaviour of nanocrystalline Fe80Cr20 alloys and ferritic steel implanted with lanthanum and titanium |
| description |
Fe-Cr alloys and ferritic steel have received considerable attention as Solid Oxide
Fuel Cell (SOFC) interconnects material. However, the main problem with the use
of Fe-Cr alloys and ferritic steels as interconnect materials is their inadequate high
temperature oxidation resistance. Chromium dioxide as the protective layers
becomes non protective, due to formation of crack and volatile Cr2O3 upon exposure
at high temperature oxidation. The prepared Fe80Cr20 alloy with smallest crystallite
size expected to develop a protective film of Cr2O3 scales. On other hand, surface
treatment via ion implantation technique can improve the oxidation resistance of
alloys. Therefore, the purpose of this study is to investigate the oxidation resistance
of implanted and unimplanted Fe80Cr20 alloy and available commercial ferritic steel
in normal atmosphere over the temperature range of 1173-1373 K. Nanocrystalline
Fe80Cr20 alloys have been produced by mechanical alloying process followed by hot
compaction process. Lanthanum and titanium dopant were implanted into substrate
of specimens with ion doses of 1x10
17
2
ions/cm
. Implanted and unimplanted of
specimens were subjected to oxidation at 1173 K, 1273 K, and 1373 K for 100 h.
Morphology characterization of oxide scales of specimens were investigated by XRay
Diffraction
(XRD)
and
Scanning
Electron
Microscope
(SEM)
coupled
with
Energy
Dispersive
X-Ray
analysis
(EDX).
The
results
shows that
Fe80Cr20
60
h as
the
smallest
crystallite
size
exhibit
better
oxidation
resistance.
The
results
also
indicates
that
the
implantation
of
lanthanum
dopant
effectively
reduce
the growth
of
oxide
scale
as
well
as
increases
the oxidation
resistance. |
| format |
Thesis |
| qualification_name |
Master of Philosophy (M.Phil.) |
| qualification_level |
Master's degree |
| author |
Saryanto, Hendi |
| author_facet |
Saryanto, Hendi |
| author_sort |
Saryanto, Hendi |
| title |
High temperature oxidation behaviour of nanocrystalline Fe80Cr20 alloys and ferritic steel implanted with lanthanum and titanium |
| title_short |
High temperature oxidation behaviour of nanocrystalline Fe80Cr20 alloys and ferritic steel implanted with lanthanum and titanium |
| title_full |
High temperature oxidation behaviour of nanocrystalline Fe80Cr20 alloys and ferritic steel implanted with lanthanum and titanium |
| title_fullStr |
High temperature oxidation behaviour of nanocrystalline Fe80Cr20 alloys and ferritic steel implanted with lanthanum and titanium |
| title_full_unstemmed |
High temperature oxidation behaviour of nanocrystalline Fe80Cr20 alloys and ferritic steel implanted with lanthanum and titanium |
| title_sort |
high temperature oxidation behaviour of nanocrystalline fe80cr20 alloys and ferritic steel implanted with lanthanum and titanium |
| granting_institution |
Universiti Tun Hussein Malaysia |
| granting_department |
Fakulti Kejuruteraan Mekanikal dan Pembuatan |
| publishDate |
2011 |
| url |
http://eprints.uthm.edu.my/2623/1/24p%20HENDI%20SARYANTO.pdf http://eprints.uthm.edu.my/2623/2/HENDI%20SARYANTO%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/2623/3/HENDI%20SARYANTO%20WATERMARK.pdf |
| _version_ |
1747830969537134592 |