Chemical Bonds between Laser Welded Aluminum and Polyamide?

Pierre Hirchenhahn, Adham Al Sayyad, Julien Bardon, Alexandre Felten, Peter Plapper, Laurent Houssiau

Résultats de recherche: Contribution à un événement scientifique (non publié)Autre

Résumé

Hybrid assemblies, like polymer/metal systems, are more and more used for applications in automotive or biomedical industries. Indeed, such assemblies are efficient ways to get lightweight structures, increasing fuel efficiency. They also open a wide range of design opportunities for biomedical applications. The main issue with hybrid systems is their assembly. Different ways of assembling polymers and metals are reported and present many advantages and drawbacks. Among them, laser welding is a promising method, thanks to its fast process, freedom of design and absence of adhesives. Even if there are good achievements with laser welding of hybrid materials, the adhesion mechanisms involved are still unknown. This work aims at getting a deep knowledge on the chemical bonding between a polymer, polyamide-6.6, and a metal, aluminium (Al), after laser welding. Therefore, a study based on a combination of ToF-SIMS and XPS has been successfully carried out. First, model samples were prepared by spin-coating polyamide-6.6 on mirror polished aluminium plates. The two materials were then laser welded, and finally the polyamide-6.6 was dissolved so that the polymer remaining on the surface is strongly (chemically) bonded to the Al, which then could be analysed by ToF-SIMS. A principal component analysis in both positive and negative mode was performed in order to understand chemical modifications brought about by the laser treatment. Different hybrid ions, containing fragments from the polymer bound to Al, were detected, like C2H2OAl+, C2OAl+ or COAl-, AlCONH-, but also characteristic ions of both materials like Al+ and AlO- for the aluminium, and CH4N+, CH2N+ and CNO-, NH- for the polyamide. Chemical binding already occurs on the samples prior to welding, but the results show that hybrid ions are more intense after welding, suggesting that more bonds are created by the laser heat treatment. The results were confirmed by XPS by carefully studying the high resolution spectra of the carbon 1s. Finally, the same approach was applied to real assemblies (thick Al and polyamide plates joined by laser). The interface Al/polyamide was exposed by breaking the assembly followed by dissolution of the remaining polymer. Again, hybrid ions were detected by ToF-SIMS inside the junction area, providing some hints on the binding chemistry.
langue originaleAnglais
étatPublié - 18 sept. 2018
EvénementSIMS Europe 2018 - Münster, Allemagne
Durée: 16 sept. 201818 sept. 2018
https://www.sims-europe.org/

Une conférence

Une conférenceSIMS Europe 2018
PaysAllemagne
La villeMünster
période16/09/1818/09/18
Adresse Internet

mots-clés

  • adhesion
  • laser welding

Citer ceci

Hirchenhahn, P., Al Sayyad, A., Bardon, J., Felten, A., Plapper, P., & Houssiau, L. (2018). Chemical Bonds between Laser Welded Aluminum and Polyamide?. SIMS Europe 2018, Münster, Allemagne.
Hirchenhahn, Pierre ; Al Sayyad, Adham ; Bardon, Julien ; Felten, Alexandre ; Plapper, Peter ; Houssiau, Laurent. / Chemical Bonds between Laser Welded Aluminum and Polyamide?. SIMS Europe 2018, Münster, Allemagne.
@conference{5708710821a54ab5b8372b7b19703b2e,
title = "Chemical Bonds between Laser Welded Aluminum and Polyamide?",
abstract = "Hybrid assemblies, like polymer/metal systems, are more and more used for applications in automotive or biomedical industries. Indeed, such assemblies are efficient ways to get lightweight structures, increasing fuel efficiency. They also open a wide range of design opportunities for biomedical applications. The main issue with hybrid systems is their assembly. Different ways of assembling polymers and metals are reported and present many advantages and drawbacks. Among them, laser welding is a promising method, thanks to its fast process, freedom of design and absence of adhesives. Even if there are good achievements with laser welding of hybrid materials, the adhesion mechanisms involved are still unknown. This work aims at getting a deep knowledge on the chemical bonding between a polymer, polyamide-6.6, and a metal, aluminium (Al), after laser welding. Therefore, a study based on a combination of ToF-SIMS and XPS has been successfully carried out. First, model samples were prepared by spin-coating polyamide-6.6 on mirror polished aluminium plates. The two materials were then laser welded, and finally the polyamide-6.6 was dissolved so that the polymer remaining on the surface is strongly (chemically) bonded to the Al, which then could be analysed by ToF-SIMS. A principal component analysis in both positive and negative mode was performed in order to understand chemical modifications brought about by the laser treatment. Different hybrid ions, containing fragments from the polymer bound to Al, were detected, like C2H2OAl+, C2OAl+ or COAl-, AlCONH-, but also characteristic ions of both materials like Al+ and AlO- for the aluminium, and CH4N+, CH2N+ and CNO-, NH- for the polyamide. Chemical binding already occurs on the samples prior to welding, but the results show that hybrid ions are more intense after welding, suggesting that more bonds are created by the laser heat treatment. The results were confirmed by XPS by carefully studying the high resolution spectra of the carbon 1s. Finally, the same approach was applied to real assemblies (thick Al and polyamide plates joined by laser). The interface Al/polyamide was exposed by breaking the assembly followed by dissolution of the remaining polymer. Again, hybrid ions were detected by ToF-SIMS inside the junction area, providing some hints on the binding chemistry.",
keywords = "adhesion, laser welding",
author = "Pierre Hirchenhahn and {Al Sayyad}, Adham and Julien Bardon and Alexandre Felten and Peter Plapper and Laurent Houssiau",
year = "2018",
month = "9",
day = "18",
language = "English",
note = "null ; Conference date: 16-09-2018 Through 18-09-2018",
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}

Hirchenhahn, P, Al Sayyad, A, Bardon, J, Felten, A, Plapper, P & Houssiau, L 2018, 'Chemical Bonds between Laser Welded Aluminum and Polyamide?', SIMS Europe 2018, Münster, Allemagne, 16/09/18 - 18/09/18.

Chemical Bonds between Laser Welded Aluminum and Polyamide? / Hirchenhahn, Pierre; Al Sayyad, Adham; Bardon, Julien; Felten, Alexandre; Plapper, Peter; Houssiau, Laurent.

2018. SIMS Europe 2018, Münster, Allemagne.

Résultats de recherche: Contribution à un événement scientifique (non publié)Autre

TY - CONF

T1 - Chemical Bonds between Laser Welded Aluminum and Polyamide?

AU - Hirchenhahn, Pierre

AU - Al Sayyad, Adham

AU - Bardon, Julien

AU - Felten, Alexandre

AU - Plapper, Peter

AU - Houssiau, Laurent

PY - 2018/9/18

Y1 - 2018/9/18

N2 - Hybrid assemblies, like polymer/metal systems, are more and more used for applications in automotive or biomedical industries. Indeed, such assemblies are efficient ways to get lightweight structures, increasing fuel efficiency. They also open a wide range of design opportunities for biomedical applications. The main issue with hybrid systems is their assembly. Different ways of assembling polymers and metals are reported and present many advantages and drawbacks. Among them, laser welding is a promising method, thanks to its fast process, freedom of design and absence of adhesives. Even if there are good achievements with laser welding of hybrid materials, the adhesion mechanisms involved are still unknown. This work aims at getting a deep knowledge on the chemical bonding between a polymer, polyamide-6.6, and a metal, aluminium (Al), after laser welding. Therefore, a study based on a combination of ToF-SIMS and XPS has been successfully carried out. First, model samples were prepared by spin-coating polyamide-6.6 on mirror polished aluminium plates. The two materials were then laser welded, and finally the polyamide-6.6 was dissolved so that the polymer remaining on the surface is strongly (chemically) bonded to the Al, which then could be analysed by ToF-SIMS. A principal component analysis in both positive and negative mode was performed in order to understand chemical modifications brought about by the laser treatment. Different hybrid ions, containing fragments from the polymer bound to Al, were detected, like C2H2OAl+, C2OAl+ or COAl-, AlCONH-, but also characteristic ions of both materials like Al+ and AlO- for the aluminium, and CH4N+, CH2N+ and CNO-, NH- for the polyamide. Chemical binding already occurs on the samples prior to welding, but the results show that hybrid ions are more intense after welding, suggesting that more bonds are created by the laser heat treatment. The results were confirmed by XPS by carefully studying the high resolution spectra of the carbon 1s. Finally, the same approach was applied to real assemblies (thick Al and polyamide plates joined by laser). The interface Al/polyamide was exposed by breaking the assembly followed by dissolution of the remaining polymer. Again, hybrid ions were detected by ToF-SIMS inside the junction area, providing some hints on the binding chemistry.

AB - Hybrid assemblies, like polymer/metal systems, are more and more used for applications in automotive or biomedical industries. Indeed, such assemblies are efficient ways to get lightweight structures, increasing fuel efficiency. They also open a wide range of design opportunities for biomedical applications. The main issue with hybrid systems is their assembly. Different ways of assembling polymers and metals are reported and present many advantages and drawbacks. Among them, laser welding is a promising method, thanks to its fast process, freedom of design and absence of adhesives. Even if there are good achievements with laser welding of hybrid materials, the adhesion mechanisms involved are still unknown. This work aims at getting a deep knowledge on the chemical bonding between a polymer, polyamide-6.6, and a metal, aluminium (Al), after laser welding. Therefore, a study based on a combination of ToF-SIMS and XPS has been successfully carried out. First, model samples were prepared by spin-coating polyamide-6.6 on mirror polished aluminium plates. The two materials were then laser welded, and finally the polyamide-6.6 was dissolved so that the polymer remaining on the surface is strongly (chemically) bonded to the Al, which then could be analysed by ToF-SIMS. A principal component analysis in both positive and negative mode was performed in order to understand chemical modifications brought about by the laser treatment. Different hybrid ions, containing fragments from the polymer bound to Al, were detected, like C2H2OAl+, C2OAl+ or COAl-, AlCONH-, but also characteristic ions of both materials like Al+ and AlO- for the aluminium, and CH4N+, CH2N+ and CNO-, NH- for the polyamide. Chemical binding already occurs on the samples prior to welding, but the results show that hybrid ions are more intense after welding, suggesting that more bonds are created by the laser heat treatment. The results were confirmed by XPS by carefully studying the high resolution spectra of the carbon 1s. Finally, the same approach was applied to real assemblies (thick Al and polyamide plates joined by laser). The interface Al/polyamide was exposed by breaking the assembly followed by dissolution of the remaining polymer. Again, hybrid ions were detected by ToF-SIMS inside the junction area, providing some hints on the binding chemistry.

KW - adhesion

KW - laser welding

M3 - Other

ER -

Hirchenhahn P, Al Sayyad A, Bardon J, Felten A, Plapper P, Houssiau L. Chemical Bonds between Laser Welded Aluminum and Polyamide?. 2018. SIMS Europe 2018, Münster, Allemagne.