航空材料学报2025，Vol.45Issue(3)：75-84,10.DOI:10.11868/j.issn.1005-5053.2025.000062
铝合金表面活化及其与CF/PEEK复合材料电阻焊性能
Surface activation of aluminum alloy on its resistance welding performance with CF/PEEK composites
摘要
Abstract
The resistance welding process of 7075 aluminum alloy(7075AA)and carbon fiber reinforced polyether ether ketone(CF/PEEK)is optimized through the activation of the aluminum alloy surface and its subsequent integration with a thermoplastic layer.A microgroove network is fabricated on the aluminum alloy surface using laser treatment,which notably augmented the mechanical coupling with the polyetherimide(PEI)thermoplastic layer.In contrast,the bonding effectiveness of sandblasted and untreated samples are inferior.Surface analysis conducted via Fourier transform infrared spectroscopy(FT-IR)and X-ray photoelectron spectroscopy(XPS)reveal the formation of Al—O—Si bonds and a silane coupling film transition layer,both of which fortified the interface.In the resistance welded joints,incomplete bonding between the sandblasted/laser-etched aluminum alloy and the PEI layer lead to debonding of the thermoplastic layer,which emerge as the predominant failure mode.The single lap shear strength(LSS)of the sandblasted joint is 10.47 MPa,whereas the LSS of the laser-etched joint attains 15.35 MPa.Following silane treatment,the bonding of the PEI thermoplastic layer is markedly enhanced,resulting in an LSS of 19.03 MPa for the laser-etched and silane-treated joint—a 23.97%increase compared to simple laser etching.At this juncture,the cross-section of the joint exhibites characteristics indicative of heating element fracture,with the failure mode transitioning to interlayer fracture.关键词
7075AA/CF/PEEK复合材料/表面增塑改性/强化热塑层/电阻焊接Key words
7075AA/CF/PEEK composites/surface plasticization modification/reinforced thermoplastic layer/resistance welding引用本文复制引用
谌顺心,徐任信..铝合金表面活化及其与CF/PEEK复合材料电阻焊性能[J].航空材料学报,2025,45(3):75-84,10.基金项目
国家自然科学基金(62171331) （62171331）
