Experimental study on aluminium to tungsten carbide/polycrystalline diamond (WC/PCD) adhesive bonding for milling tools

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Correia, DS (Author) Other; Ricardo Carbas (Author) FEUP; Marques, EAS (Author) FEUP; das Neves, PJC (Author) Other; da Silva, LFM (Author) FEUP

Journal

Title: International Journal of Adhesion and Adhesives

Vol. 114

ISSN: 0143-7496

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00W-6KB

DOI: 10.1016/j.ijadhadh.2022.103121

Abstract (EN): Nowadays the use of adhesives is deeply embedded in the modern automotive and aeronautical industries. However, in other areas, such as the milling tool sector, it is still a quite unexplored technology. This work studies the adhesive bonding process between aluminium and WC/PCD, both commonly used in woodworking milling tools. To allow for electric discharge machining (EDM) as a sharpening process, an electrically conductive adhesive combined with conductive microspheres was used.Bulk tensile tests, thick adherend shear tests (TAST), double cantilever beam (DCB) tests and end notched fracture (ENF) tests were used to mechanically characterise the adhesive. The joining process was studied using small-scale single lap joint (SLJ) specimens manufactured with three v/v% of spheres -0%, 5% and 10%. The need for surface treatments was evaluated by measuring the surface energy of the substrates, applying then the necessary procedures. And the electrical resistance of the studied joints was measured with the four-probe method.It was found that with the increase in v/v% of spheres both the electrical resistance and strength decreased. However, when looking for a good compromise between both mechanical and electrical properties, the results point towards the 5% spheres content.To finalise this study, the previously detailed adhesive characterisation was performed once again for the chosen v/v% of spheres, showing a reduction in fracture toughness, as expected.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 14