| People | Locations | Statistics |
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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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| Kononenko, Denys |
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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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| Muller, Hermance |
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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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| Blanpain, Bart |
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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
University of Chester
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (32/32 displayed)
- 2023Effect of laser shock peening on austempered ductile ironcitations
- 2020On restructuring the microstructure of Ti-6Al-7Nb alloy before surface engineeringcitations
- 2019Residual stress, phase, microstructure and mechanical property studies of ultrafine bainitic steel through laser shock peeningcitations
- 2019Effect of laser shock peening on commercially pure titanium-1 weldment fabricated by gas tungsten arc welding techniquecitations
- 2019Altering the wetting properties of orthopaedic titanium alloy (Ti–6Al–7Nb) using laser shock peeningcitations
- 2019Shock-wave induced compressive stress on alumina ceramics by laser peeningcitations
- 2018Enhanced surface and mechanical properties of bioinspired nanolaminate graphene-aluminium alloy nanocomposites through laser shock processing for biomedical implant and engineering applicationscitations
- 2018Laser shock peening without coating induced residual stress distribution, wettability characteristics and enhanced pitting corrosion resistance of austenitic stainless steelcitations
- 2018Laser cleaning of grey cast iron automotive brake disc
- 2017Effect of Laser Shock Peening (LSP) on the Microstructure, Residual Stress State and Hardness of a Nickel based Superalloy
- 2017Improvement in mechanical properties of titanium alloy (Ti-6Al-7Nb) subject to multiple laser shock peeningcitations
- 2017Corrigendum to “Surface property modifications of silicon carbide ceramic following laser shock peening” [J. Eur. Ceram. Soc. 37 (9) (2017) 3027–3038]
- 2017Surface property modifications of silicon carbide ceramic following laser shock peeningcitations
- 2016Development in laser peening of advanced ceramiccitations
- 2016Modulating the wettability characteristics and bioactivity of polymeric materials using laser surface treatmentcitations
- 2015Laser surface treatment of polyamide and NiTi alloy and the effects on mesenchymal stem cell response
- 2015Development in laser peening of advanced ceramicscitations
- 2015Modulating the wettability characteristics and bioactivity of polymeric materials using laser surface treatment
- 2014Investigation of temperature distribution during CO2 laser and fibre laser processing of a Si3N4 engineering ceramic by means of a computational and experimental approach
- 2014Laser Shock Peening and Mechanical Shot Peening Processes Applicable for the Surface Treatment of Technical Grade Ceramicscitations
- 2013Role of laser beam radiance in different ceramic processingcitations
- 2013Investigation of temperature distribution during CO2 and Fibre laser processing of Si3N4 engineering ceramic by means of a computational and experimental approach
- 2013Evaluation of surface cracks following processing of a ZrO2 advance ceramic with CO2 and fibre laser radiation
- 2013Evaluation of Surface Cracks following Processing of a ZrO2 Advance Ceramic with CO2 and Fibre laser Radiation
- 2011Influence of laser beam brightness during surface treatment of a ZrO 2 engineering ceramic
- 2010Surface characterization and compositional evaluation of a fibre laser processed silicon nitride (Si3N4) engineering ceramic
- 2010Analysis of temperature distribution during fibre laser surface treatment of a zirconia engineering ceramiccitations
- 2010Fracture toughness modifications by means of CO2 laser beam surface processing of a silicon nitride engineering ceramiccitations
- 2010Fracture toughness of a zirconia engineering ceramic and the effects thereon of surface processing with fibre laser radiationcitations
- 2010On the Establishment of an Appropriate Method for Evaluating the Residual Stresses after Laser Surface Treatment of ZrO2 and Si3N4 Engineering Ceramics’
- 2009Characterization and compositional study of fibre laser processed engineering ceramics
- 2009Laser surface treatment of engineering ceramics and the effects thereof on fracture toughness
Places of action
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article
Surface characterization and compositional evaluation of a fibre laser processed silicon nitride (Si3N4) engineering ceramic
Abstract
Fibre laser surface treatment of a cold isostatic pressed (CIP) Si<sub>3</sub>N<sub>4</sub> engineering ceramic was performed using various processing gas compositions to observe the changes on and within the surface of the engineering ceramic; in particular, surface topography, material removal, chemical composition, surface hardness and distribution of the heat affected zone (HAZ).Surface melting and distribution of the melt zone were found with all fibre laser radiated samples, as well as surface finish and the material removal varying with changes in the gas composition. Fibre laser processing of the Si<sub>3</sub>N<sub>4</sub> with N<sub>2</sub> assist gas proved to be the most effective combination for effecting micro-structural changes as small sized elongated grains were found as a result of the faster cooling rate. Consequently, O<sub>2</sub>, ambient air and compressed air produced considerable amount of morphological changes. This was found to be due to de-composition, material removal of the upper most surface layer and the Si<sub>3</sub>N<sub>4</sub>ceramic’s interaction with the assist gas compositions and the atmosphere at elevated temperatures. Maximum material removal was found when O<sub>2</sub> assist gas was employed, taking in account of the O<sub>2</sub> generating an exothermic reaction and consequently excessive heating. The compositional analysis revealed a chemical change occurring within all fibre laser radiated surfaces of the Si<sub>3</sub>N<sub>4</sub> engineering ceramic as fibre laser radiated Si<sub>3</sub>N<sub>4</sub> was transformed to SiO<sub>2</sub>.