On the predominant mechanisms active during the high–power diode–laser modification of the wettability characteristics of an SiO2/Al2O3–based ceramic material

Abstract

Restricted accessMoreSectionsView PDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InRedditEmail Cite this article Lawrence J. 2002On the predominant mechanisms active during the high–power diode–laser modification of the wettability characteristics of an SiO2/Al2O3–based ceramic materialProc. R. Soc. Lond. A.4582445–2463http://doi.org/10.1098/rspa.2002.0984SectionRestricted accessOn the predominant mechanisms active during the high–power diode–laser modification of the wettability characteristics of an SiO2/Al2O3–based ceramic material J. Lawrence J. Lawrence Manufacturing Engineering Division, School of Mechanical and Production Engineering, Nanyang Technological University (NTU), Nanyang Avenue, Singapore 639798 () Google Scholar Find this author on PubMed Search for more papers by this author J. Lawrence J. Lawrence Manufacturing Engineering Division, School of Mechanical and Production Engineering, Nanyang Technological University (NTU), Nanyang Avenue, Singapore 639798 () Google Scholar Find this author on PubMed Search for more papers by this author Published:08 October 2002https://doi.org/10.1098/rspa.2002.0984AbstractThe mechanisms responsible for modifications to the wettability characteristics of an SiO2/Al2O3–based ceramic material in terms of a test–liquid set, comprising human blood, human blood plasma, glycerol and 4–octonol, after high–power diode–laser (HPDL) treatment, have been elucidated. Changes in the contact angle, θ, and hence the wettability characteristics of the SiO2/Al2O3–based ceramic, were attributed primarily to modifications to the surface roughness of the ceramic resulting from HPDL interaction, which accordingly effected reductions in θ, and to the increase in the surface oxygen content of the ceramic after HPDL treatment, since an increase in surface oxygen content intrinsically brings about a decrease in θ (and vice versa) and the increase in the polar component of the surface energy, γPsv, due to the HPDL–induced surface melting and resolidification, which consequently created a partly vitrified microstructure that was seen to augment the wetting action. However, the degree of influence exerted by each mechanism was found to differ markedly. Isolation of each of these mechanisms permitted the magnitude of their influence to be determined qualitatively. Surface energy, by way of microstructural changes, was found to be by far the most predominant element governing the wetting characteristics of the SiO2/Al2O3–based ceramic. To a much lesser extent, surface oxygen content, by way of process gas, was also seen to influence changes in the wettability characteristics of the SiO2/Al2O3–based ceramic, while surface roughness was found to play a minor role in inducing changes in the wettability characteristics. Previous ArticleNext Article VIEW FULL TEXT DOWNLOAD PDF FiguresRelatedReferencesDetailsCited by Lawrence J, Waugh D and Liang H (2014) Predominant and Generic Parameters Governing the Wettability Characteristics of Selected Laser-Modified Engineering Materials Laser Surface Modification and Adhesion, 10.1002/9781118831670.ch8, (289-335) Hao L and Lawrence J (2006) Effects of Nd:YAG laser treatment on the wettability characteristics of a zirconia-based bioceramic, Optics and Lasers in Engineering, 10.1016/j.optlaseng.2005.08.001, 44:8, (803-814), Online publication date: 1-Aug-2006. Hao L, Lawrence J and Chian K (2005) Osteoblast cell adhesion on a laser modified zirconia based bioceramic, Journal of Materials Science: Materials in Medicine, 10.1007/s10856-005-2608-3, 16:8, (719-726), Online publication date: 1-Aug-2005. Hao L, Lawrence J, Phua Y, Chian K, Lim G and Zheng H (2005) Enhanced human osteoblast cell adhesion and proliferation on 316 LS stainless steel by means of CO2 laser surface treatment, Journal of Biomedical Materials Research Part B: Applied Biomaterials, 10.1002/jbm.b.30194, 73B:1, (148-156), Online publication date: 1-Apr-2005. Lawrence J (2004) Wetting and bonding characteristics of selected liquid metals with a high–power diode–laser–treated alumina bioceramic, Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 460:2046, (1723-1735), Online publication date: 8-Jun-2004. Hao L and Lawrence J (2005) On the role of laser-induced microstructures in influencing the surface energy of magnesia partially stabilized zirconia bioceramic, Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 10.1243/095440504772830219, 218:1, (59-76), Online publication date: 1-Jan-2004. Lawrence J and Hao L (2004) Bonding characteristics of selected liquid-metals with a CO2 laser treated magnesia partially stabilised zirconia bioceramic PICALO 2004: 1st Pacific International Conference on Laser Materials Processing, Micro, Nano and Ultrafast Fabrication, 10.2351/1.5056122, 978-0-912035-76-5, (708) Hao L, Lawrence J, Lim G and Zheng H (2004) Examination of CO2 laser-induced rapid solidification structures on magnesia partially stabilised zirconia and the effects thereof on wettability characteristics, Optics and Lasers in Engineering, 10.1016/j.optlaseng.2003.10.002, 42:3, (355-374), Online publication date: 1-Sep-2004. Hao L and Lawrence J (2003) Effects of CO2 laser irradiation on the wettability and human skin fibroblast cell response of magnesia partially stabilised zirconia, Materials Science and Engineering: C, 10.1016/S0928-4931(03)00056-0, 23:5, (627-639), Online publication date: 1-Oct-2003. This Issue08 October 2002Volume 458Issue 2026 Article InformationDOI:https://doi.org/10.1098/rspa.2002.0984Published by:Royal SocietyPrint ISSN:1364-5021Online ISSN:1471-2946History: Published online08/10/2002Published in print08/10/2002 License: Citations and impact Keywordswettabilitysurface energymeltinghigh–power diode laser (HPDL)vitrification