Laser-induced forward transfer of aluminium
| Autor: | V. Schultze, M. Wagner |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Silicon
business.industry General Physics and Astronomy chemistry.chemical_element Surfaces and Interfaces General Chemistry Condensed Matter Physics Laser Surfaces Coatings and Films law.invention High surface Glass laser Optics chemistry Aluminium law visual_art Vaporization visual_art.visual_art_medium Ceramic Composite material business Gaussian beam |
| Zdroj: | Applied Surface Science. 52:303-309 |
| ISSN: | 0169-4332 |
| Popis: | The laser-induced forward transfer (LIFT) of aluminium is experimentally investigated for aluminium target thickness up to some μm. The aluminium is transferred to glazed ceramics and to silicon substrates with and without oxidized surface, respectively. Two types of laser beam sources are used: a Nd:YAG laser with a Gaussian beam profile and a Nd:glass laser system providing a homogenized flat top profile. The resulting deposition is determined by the removal mode of the Al from the target and by the interaction of the molten Al with the substrate. In a first removal mode (low laser intensities and/or thin targets) where melting through of the target precedes the onset of vaporization at the target front side the material can easily be transferred to the substrate. In a second mode (high laser intensities and/or thick targets) the blow-off process is characterized by higher vapor pressures which leads to disturbed deposits. The interaction of impacting material with the substrate causes the formation of droplets on oxidized surfaces due to the high surface tension of liquid metals. |
| Databáze: | OpenAIRE |
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