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Surface oxidation of porous ZrB2-SiC ceramic composites by continuous-wave ytterbium fibre laser

Surface treatment of ceramic substrates by a laser beam can allow to incorporate interesting properties to these ceramics. In the present work, surface oxidation of ca. 30% porous ZrB2-SiC ceramic composites by using an ytterbium fibre laser was conducted. Oxidation of ceramic substrates through thi...

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Main Authors: Dayang Salyani, Abang Mahmod, Glandut, Nicolas, Amir Azam, Khan, Labbe, Jean Claude
Format: Article
Language:English
Published: Elsevier 2015
Subjects:
TJ Mechanical engineering and machinery
TS Manufactures
Online Access:http://ir.unimas.my/id/eprint/12735/1/Dayang%20Salyani%20Abang%20Mahmod.pdf
http://ir.unimas.my/id/eprint/12735/
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spelling my.unimas.ir.127352021-12-27T03:43:25Z http://ir.unimas.my/id/eprint/12735/ Surface oxidation of porous ZrB2-SiC ceramic composites by continuous-wave ytterbium fibre laser Dayang Salyani, Abang Mahmod Glandut, Nicolas Amir Azam, Khan Labbe, Jean Claude TJ Mechanical engineering and machinery TS Manufactures Surface treatment of ceramic substrates by a laser beam can allow to incorporate interesting properties to these ceramics. In the present work, surface oxidation of ca. 30% porous ZrB2-SiC ceramic composites by using an ytterbium fibre laser was conducted. Oxidation of ceramic substrates through this process under ambient conditions has certain advantages compared to the classical oxidation method. A particular spiral laser pattern was created in order to produce an oxidized structure on ZrB2-SiC porous substrates. The laser parameters were as follows i.e., laser power of 50, 60 and 70 W, a beam diameter of 1.25 mm, velocity of 2 mm/s, acceleration and deceleration of 1 mm/s2. The microstructural and morphological changes in the laser-treated region was examined using scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction. At laser power of 70 W, the sample exhibits uniform oxidation. It revealed that the very porous bulk beneath remained unaffected and unoxidized because this laser-formed oxide scale protects the substrate from oxidation. The presence of oxidized and unaffected regions indicated a high degree of heat localization. The dense glassy SiO2-rich layer prevents the inward oxygen diffusion into the inner bulk hence enhances the oxidation resistance. Elsevier 2015 Article PeerReviewed text en http://ir.unimas.my/id/eprint/12735/1/Dayang%20Salyani%20Abang%20Mahmod.pdf Dayang Salyani, Abang Mahmod and Glandut, Nicolas and Amir Azam, Khan and Labbe, Jean Claude (2015) Surface oxidation of porous ZrB2-SiC ceramic composites by continuous-wave ytterbium fibre laser. Applied Surface Science, 357. pp. 1982-1990. ISSN 0169-4332 https://www.scopus.com/record/display.uri?eid=2-s2.0-84945900079&origin=inward&txGid=0 10.1016/j.apsusc.2015.09.164
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
topic TJ Mechanical engineering and machinery
TS Manufactures
spellingShingle TJ Mechanical engineering and machinery
TS Manufactures
Dayang Salyani, Abang Mahmod
Glandut, Nicolas
Amir Azam, Khan
Labbe, Jean Claude
Surface oxidation of porous ZrB2-SiC ceramic composites by continuous-wave ytterbium fibre laser
description Surface treatment of ceramic substrates by a laser beam can allow to incorporate interesting properties to these ceramics. In the present work, surface oxidation of ca. 30% porous ZrB2-SiC ceramic composites by using an ytterbium fibre laser was conducted. Oxidation of ceramic substrates through this process under ambient conditions has certain advantages compared to the classical oxidation method. A particular spiral laser pattern was created in order to produce an oxidized structure on ZrB2-SiC porous substrates. The laser parameters were as follows i.e., laser power of 50, 60 and 70 W, a beam diameter of 1.25 mm, velocity of 2 mm/s, acceleration and deceleration of 1 mm/s2. The microstructural and morphological changes in the laser-treated region was examined using scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction. At laser power of 70 W, the sample exhibits uniform oxidation. It revealed that the very porous bulk beneath remained unaffected and unoxidized because this laser-formed oxide scale protects the substrate from oxidation. The presence of oxidized and unaffected regions indicated a high degree of heat localization. The dense glassy SiO2-rich layer prevents the inward oxygen diffusion into the inner bulk hence enhances the oxidation resistance.
format Article
author Dayang Salyani, Abang Mahmod
Glandut, Nicolas
Amir Azam, Khan
Labbe, Jean Claude
author_facet Dayang Salyani, Abang Mahmod
Glandut, Nicolas
Amir Azam, Khan
Labbe, Jean Claude
author_sort Dayang Salyani, Abang Mahmod
title Surface oxidation of porous ZrB2-SiC ceramic composites by continuous-wave ytterbium fibre laser
title_short Surface oxidation of porous ZrB2-SiC ceramic composites by continuous-wave ytterbium fibre laser
title_full Surface oxidation of porous ZrB2-SiC ceramic composites by continuous-wave ytterbium fibre laser
title_fullStr Surface oxidation of porous ZrB2-SiC ceramic composites by continuous-wave ytterbium fibre laser
title_full_unstemmed Surface oxidation of porous ZrB2-SiC ceramic composites by continuous-wave ytterbium fibre laser
title_sort surface oxidation of porous zrb2-sic ceramic composites by continuous-wave ytterbium fibre laser
publisher Elsevier
publishDate 2015
url http://ir.unimas.my/id/eprint/12735/1/Dayang%20Salyani%20Abang%20Mahmod.pdf
http://ir.unimas.my/id/eprint/12735/
https://www.scopus.com/record/display.uri?eid=2-s2.0-84945900079&origin=inward&txGid=0
_version_ 1720440412206792704
score 13.211869

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