Resistance Welding Joints of CF/PEEK Orthogonal Laminates Strengthened by in situ Grafting of ZnO-Nanowires: Preparation, Properties, and Mechanism
Funding: This work was supported by China Aeronautical Science Foundation (No. 2024Z048054002).
ABSTRACT
A high strength bonding interface by resistance welding has always been a goal for the production of highly reliable resin-based composite joints. In this work, SS mesh element with grafted ZnO nanowires (SSM@ZnO) was developed for resistance welding of CF/PEEK composite laminates to improving interfacial strength. First, the surface of stainless-steel mesh (SSM) was modified by in Situ grafting of zinc oxide (ZnO) nanowires via hydrothermal growth method and the as-obtained product (SSM@ZnO) used to the resistance welding of carbon fiber/polyether ether ketone (CF/PEEK) orthogonal laminates. The dependance of the SSM@ZnO microstructure, heating properties, wettability and interfacial adhesion on the growth time was investigated. The electrical heating rate under constant input power is increased from 4.8°C/s to 7.12°C/s, and IFSS between SSM@ZnO and PEEK resin is increased from original 45 MPa to 61 MPa. The mechanical properties and failure mode of CF/PEEK resistance welding joints were characterized by single lap shear stress (SLSS) and SEM, respectively. At SSM@ZnO growth time of 8 h, the SLSS reaches the maximum value of 52.8 MPa, and the failure mode was shifted from interfacial peeling between CF/PEEK laminate and adhesion layer to fiber tearing of CF/PEEK laminate surface.
Open Research
Data Availability Statement
The data that support the finding of this study are available from the corresponding author upon reasonable request.