Surface treatment on cobalt and titanium alloys using picosecond laser pulses in burst mode
| Autor: | Steffen Weißmantel, Daniel Metzner, Peter Lickschat |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0209 industrial biotechnology
Materials science business.industry medicine.medical_treatment Pulse duration Titanium alloy 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Laser Ablation law.invention Wavelength 020901 industrial engineering & automation Optics law Surface roughness medicine Surface modification General Materials Science 0210 nano-technology business Burst mode (computing) |
| Zdroj: | Applied Physics A. 127 |
| ISSN: | 1432-0630 0947-8396 |
| Popis: | The authors report on the results of surface treatment experiments using a solid-state amplified laser source emitting laser pulses with a pulse duration of 10 ps. The laser source allows the generation of pulse trains (bursts) with an intra-burst pulse repetition rate of 80 MHz (pulse-to-pulse time interval about 12.5 ns) with up to eight pulses per burst. In this study a wavelength of 1064 nm was used to investigate both ablation of material and laser-induced surface modifications occuring in metallic implant alloys CoCrMo (cobalt-chromium-molybdenum) and TiAlV (titanium-aluminum-vanadium) in dependence of the number of pulses and fluences per pulse in the burst. By using the burst mode, a smoothing effect occurs in a certain parameter range, resulting in very low surface roughness of the generated microstructures. It is demonstrated that at fluences per pulse which are smaller than the material-specific ablation threshold, a self-organized pore formation takes place if a defined number of pulses per burst is used. Thus, the advantage of the MHz burst mode in terms of a possible surface modification is established. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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