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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Shukla, Pratik P.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2015Micro-shot peening of zirconia-advanced ceramiccitations
- 2012A comparative study on the processing parameters during fibre and CO2 laser surface treatments of silicon nitride engineering ceramiccitations
- 2012The influence of brightness during laser surface treatment of Si3N4 engineering ceramicscitations
- 2011Advances in Laser Surface Treatment of Engineering Ceramics
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article
A comparative study on the processing parameters during fibre and CO2 laser surface treatments of silicon nitride engineering ceramic
Abstract
ShukThis paper demonstrates a comparative study of a relatively novel fibre laser and a conventional CO<sub>2</sub> laser to surface-process silicon nitride (Si<sub>3</sub>N<sub>4</sub>) engineering ceramic. The objective of the research is to investigate the threshold of the novel fibre laser and compare it to the conventionally used CO<sub>2</sub> laser to process Si<sub>3</sub>N<sub>4</sub> engineering ceramic and to produce a laser surface treatment free from major surface cracking without using any of the pre- or post heating techniques as this would increase the cost of the process and add more expense to the product when considering a bigger view point. The results showed that the fibre laser surface processing of the Si<sub>3</sub>N<sub>4</sub> engineering ceramic differed to that of the CO<sub>2</sub> laser as the Gaussian beam modes, the beam quality factors, wavelength and the beam delivery systems were different between the two lasers. This consequently had a different effect on the surface of the Si<sub>3</sub>N<sub>4</sub> engineering ceramic. The CO<sub>2</sub> laser wavelength when surface treating the Si<sub>3</sub>N<sub>4</sub> engineering ceramic was being absorbed more than that of the fibre laser as higher power density and same traverse speed was used to reach the threshold for the Si<sub>3</sub>N<sub>4</sub> engineering ceramic.