Materials composed of a polymer matrix reinforced with carbon/glass fibres providing lightweight and superior mechanical properties are widely used as structural components for automotive and aerospace applications. However, such parts need to be joined with various metal alloys to obtain better mechanical performance in many structural elements. Many studies have reported enhancements in polymer-metal bonding using adhesives, adhesive/rivet combined joints, and different surface treatments. This study investigated the influences of various surface treatments on the adhesion between glass-reinforced poly(phenylene) sulphide (PPS) and aluminium alloy during the injection over-moulding process. Adhesion strength was evaluated via the shear test. Correlations for the shear strength of the polymer-metal with different metal-substrate treatments were studied. Since the strongest bonding was attained in the treatment with the highest roughness, this value, as it determines the level of micromechanical interlocking of connected materials, seems to be a critical factor affecting the adhesion strength. Three-dimensional (3D) topographic images characterized with a 3D optical microscope indicated that there was a meaningful influence exerted by the interface topologies of the aluminium substrates used for the over-moulding process. The results further indicated that increases in a substrate's surface energy in connection with atmospheric plasma treatments negatively influence the final level of the bonding mechanism.

Centre of Polymer Systems University Institute Tomas Bata University in Zlin 76001 Zlin Czech Republic

Department of Physics and Materials Engineering Faculty of Technology Tomas Bata University in Zlin 76001 Zlin Czech Republic

Department of Polymer Engineering Faculty of Technology Tomas Bata University in Zlin 76001 Zlin Czech Republic

Language Centre Faculty of Humanities Tomas Bata University in Zlin 76001 Zlin Czech Republic

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Li X., Liu F., Gong N., Yang C., Wang B. Surface Topography Induced High Injection Joining Strength of Polymer-Metal Composite and Fracture Mechanism. Compos. Struct. 2018;184:545–553. doi: 10.1016/j.compstruct.2017.10.020. DOI

Martinsen K., Hu S.J., Carlson B.E. Joining of Dissimilar Materials. CIRP Ann. Manuf. Technol. 2015;64:679–699. doi: 10.1016/j.cirp.2015.05.006. DOI

Mandolfino C., Lertora E., Gambaro C. Key Engineering Materials. Volume 554–557. Trans Tech Publications Ltd.; Bach, Switzerland: 2013. Effect of Surface Pretreatment on the Performance of Adhesive-Bonded Joints; pp. 996–1006.

Xu Z., Li N. Effects of Surface Microstructure and Molding Parameters on Injection Bonding Strength of Polyphenylenesulphide-Aluminum Alloy. Mater. Express. 2020;10:640–647. doi: 10.1166/mex.2020.1688. DOI

Iqbal H.M.S., Bhowmik S., Poulis J.A., Benedictus R. Effect of Plasma Treatment and Electron Beam Radiations on the Strength of Nanofilled Adhesive-Bonded Joints. Polym. Eng. Sci. 2010;50:1505–1511. doi: 10.1002/pen.21628. DOI

Lucchetta G., Marinello F., Bariani P.F. Aluminum Sheet Surface Roughness Correlation with Adhesion in Polymer Metal Hybrid Overmolding. CIRP Ann.—Manuf. Technol. 2011;60:559–562. doi: 10.1016/j.cirp.2011.03.073. DOI

Grujicic M., Sellappan V., Omar M.A., Seyr N., Obieglo A., Erdmann M., Holzleitner J. An Overview of the Polymer-to-Metal Direct-Adhesion Hybrid Technologies for Load-Bearing Automotive Components. J. Mater. Process. Technol. 2008;197:363–373. doi: 10.1016/j.jmatprotec.2007.06.058. DOI

Ochoa-Putman C., Vaidya U.K. Mechanisms of Interfacial Adhesion in Metal-Polymer Composites—Effect of Chemical Treatment. Compos. Part A Appl. Sci. Manuf. 2011;42:906–915. doi: 10.1016/j.compositesa.2011.03.019. DOI

Shahid M., Hashim S.A. Effect of Surface Roughness on the Strength of Cleavage Joints. Volume 22 Elsevier; Amsterdam, The Netherlands: 2002.

Iqbal H.M.S., Bhowmik S., Benedictus R. Surface Modification of High Performance Polymers by Atmospheric Pressure Plasma and Failure Mechanism of Adhesive Bonded Joints. Int. J. Adhes. Adhes. 2010;30:418–424. doi: 10.1016/j.ijadhadh.2010.02.007. DOI

Kadlečková M., Minařík A., Smolka P., Mráček A., Wrzecionko E., Novák L., Musilová L., Gajdošík R. Preparation of Textured Surfaces on Aluminum-Alloy Substrates. Materials. 2018;12:109. doi: 10.3390/ma12010109. PubMed DOI PMC

Heckert A., Zaeh M.F. Laser Surface Pre-Treatment of Aluminium for Hybrid Joints with Glass Fibre Reinforced Thermoplastics. Phys. Procedia. 2014;56:1171–1181. doi: 10.1016/j.phpro.2014.08.032. DOI

Moritz J., Götze P., Schiefer T., Stepien L., Klotzbach A., Standfuß J., López E., Brückner F., Leyens C. Additive Manufacturing of Titanium with Different Surface Structures for Adhesive Bonding and Thermal Direct Joining with Fiber-Reinforced Polyether-Ether-Ketone (PEEK) for Lightweight Design Applications. Metals. 2021;11:265. doi: 10.3390/met11020265. DOI

Gardiner G. Overmolding Expands PEEK’s Range in Composites. CompositesWorld. Jul 1, 2015. [(accessed on 5 January 2022)]. Available online: https://www.compositesworld.com/articles/overmolding-expands-peeks-range-in-composites.

Handbook of Plasma Surface Technnology—Plasma Technology. Diener Electronic GmbH Co. KG; Ebhausen, Germany: 2020.

Miturska-Barańska I., Rudawska A., Doluk E. The Influence of Sandblasting Process Parameters of Aerospace Aluminium Alloy Sheets on Adhesive Joints Strength. Materials. 2021;14:6626. doi: 10.3390/ma14216626. PubMed DOI PMC

Wurzbacher S., Gach S., Reisgen U., Hopmann C. Joining of Plastic-Metal Hybrid Components by Overmoulding of Specially Designed Form-Closure Elements (Fügen von Kunststoff-Metall-Hybridbauteilen Durch Das Hinterspritzen Gezielt Aufgebauter Formschlusselemente) Mater. Werkst. 2021;52:367–378. doi: 10.1002/mawe.202000158. DOI

Leahy W., Barron V., Buggy M., Young T., Mas A., Schue F., McCabe T., Bridge M. Plasma Surface Treatment of Aerospace Materials for Enhanced Adhesive Bonding. J. Adhes. 2001;77:215–249. doi: 10.1080/00218460108030739. DOI

Surface Treatments' Influence on the Interfacial Bonding between Glass Fibre Reinforced Elium® Composite and Polybutylene Terephthalate