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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| Language: | English |
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Elsevier
2015
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| Online Access: | http://ir.unimas.my/id/eprint/12735/ http://ir.unimas.my/id/eprint/12735/1/Dayang%20Salyani%20Abang%20Mahmod.pdf |
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| 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 |
| building | UNIMAS Institutional Repository |
| collection | Online Access |
| 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. |
| first_indexed | 2025-11-15T06:36:53Z |
| format | Article |
| id | unimas-12735 |
| institution | Universiti Malaysia Sarawak |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T06:36:53Z |
| publishDate | 2015 |
| publisher | Elsevier |
| recordtype | eprints |
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| spelling | unimas-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 |
| 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 |
| title | 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_short | 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 |
| topic | TJ Mechanical engineering and machinery TS Manufactures |
| url | http://ir.unimas.my/id/eprint/12735/ http://ir.unimas.my/id/eprint/12735/ http://ir.unimas.my/id/eprint/12735/ http://ir.unimas.my/id/eprint/12735/1/Dayang%20Salyani%20Abang%20Mahmod.pdf |