Excimer laser induced surface nitriding of aluminium alloy

Sicard, E.; Boulmer‐Leborgne, C.; Sauvage, Thierry

doi:10.1016/s0169-4332(97)00732-0

Cited by 24 publications

(7 citation statements)

References 7 publications

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“…Thus, for example the very interesting iron nitrides in [20] were observed, which entails an enormous increase of the tribological properties. This is also observed for AlN in [21]. The most examined system for this method is probably TiN.…”

supporting

confidence: 64%

Laser nitriding: investigations on the model system TiN. A review

Höche

Schaaf

2010

Heat Mass Transfer

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Nitriding is a well known technique to improve properties of materials. The process utilizing laser contains many different processes like heat transport and melting effects, diffusion and convection, which partially determine the synthesized coatings. This review concludes the research on titanium nitride synthesis in reactive ambient and draws conclusions for the general handling of the method. Afterwards, it becomes clear which and why, transport processes limit the coating properties. IntroductionHard material systems such as titanium nitride play an important role within the field of material sciences and industrial applications. In particular wear and corrosion protection are based on such systems. Beside the classical manufacturing procedures such as PVD or CVD, the method of the direct laser synthesis in a reactive gas environment, as examined here, represents an alternative to the production of such coatings. This review discusses the synthesis of such functional coatings on the system titanium -nitrogen by different laser irradiation based on own results respectively the literature and tries to give a general overview of the physical respectively transport processes taking place. Thus, experiments from the last three decades using similar experimental setups will be compared and discussed. Due to the availability of data of investigations utilizing titanium and nitrogen, this system was taken as a general model. After a discussion of several different experimental analyses and modelling results, the treatments get parameterized. This results in large potentials for technical applications. Finally, general conditions for the synthesis of such coatings with this procedure were set up. By means of these results it is possible to achieve purposefully predefined layer characteristics. The review concludes the most important publications containing research about this process. Thus, it could be assumed to be a reference in relation to laser nitriding or -carburizing. [4] or also hybrid procedures. A further alternative and very simple method is the direct lasers synthesis. The material is placed in a reactive gas environment and will be irradiated with laser light. Due to the developing physical and chemical effects coatings are synthesized, which possess special treatment dependent characteristics. Carburizing, nitro carburizing and/or nitriding are to most common methods from this field of processes. The method of nitriding particularly assists the improvement of tribological properties of surfaces. The surface hardness gets increased, whereby the wear resistance rises. Furthermore, these coatings are usually very non-reactive, which leads to an increase in corrosion protection. In the following the method will be studied more exactly and will be explained. Quantifying of the processes gets an important aim of the work. Arising phenomena will also be modelled. To do these investigations, the model titanium nitrogen has been used. It is a well known and often used system, and has been investigated ...

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supporting

confidence: 64%

Laser nitriding: investigations on the model system TiN. A review

Höche

Schaaf

2010

Heat Mass Transfer

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“…2 and 3), depending on the laser parameters set, different phases are formed on metal surface. By modifying the scanning speed (mm/s), repetition rate (kHz) and pulse energy (mJ), the global energy delivered on the surface may be varied and the amount of diffused atoms in the treated surface depends upon the repetition rate [13,14]. The laser-titanium interaction only undergoes thermal effects, but during the laser pulse the surface is heated and can be melted and vaporized creating plasma state on its surface.…”

Section: Resultsmentioning

confidence: 99%

Surface modification of Ti dental implants by Nd:YVO4 laser irradiation

Braga

Marques

Filho

et al. 2007

Applied Surface Science

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“…Des traitements d'alliage d'aluminium ont été réalisés pour un nombre de tirs laser par unité de surface allant de 100 à 1200, deux gaz de traitement (CH 4 . On peut voir que de bons résultats peuvent êtres obtenus avec le propylène (C 3 H 6 ) et 400 tirs laser.…”

Section: Carburationunclassified

“…Pour durcir la surface d'un alliage il a été montré que le traitement par laser en atmosphère d'azote permet la formation de nitrures sur plusieurs microns sur de l'acier [1,2], et sur de l'aluminium [3][4][5]. Le même traitement sur l'alliage AlSi 7% Mg 03% en atmosphère de gaz carboné (C^HJ doit permettre l'incorporation de carbone et la formation de carbures.…”

Section: Introductionunclassified

Carburation d'alliage d'aluminium par traitement de surface par laser excimère

et al. 2001

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Résumé : Les alliages légers de type aluminium sont très prisés dans l'industrie automobile pour leur légèreté, mais leur mauvais comportement en usure et en frottement les rend inutilisables pour certaines applications. Pour améliorer ce comportement, une solution est de faire une couche très dure en surface, un traitement par laser à excimère de l'alliage en présence d'un gaz contenant du carbone permet une carburation de cet alliage en surface sur quelques microns d'épaisseur. Pour ce traitement on utilise un laser à excimère KrF (X= 248 nm, t= 25 ns) dont le faisceau est homogénéisé et focalisé sur l'échantillon à traiter. L'échantillon est placé dans une enceinte à vide remplie d'un gaz carboné (CH" ou C,H 6 ) à une pression de 1 bar ; pour le traitement l'échantillon peut être déplacé perpendiculairement au faisceau en X et en Y. L'ensemble laser-déplacement est piloté par ordinateur. Ce procédé permet un traitement de la surface localisé aux endroits de fortes sollicitations mécaniques et non polluant.

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Excimer laser induced surface nitriding of aluminium alloy

Cited by 24 publications

References 7 publications

Laser nitriding: investigations on the model system TiN. A review

Laser nitriding: investigations on the model system TiN. A review

Surface modification of Ti dental implants by Nd:YVO4 laser irradiation

Carburation d'alliage d'aluminium par traitement de surface par laser excimère

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