Ag/PEEK 전도성 서셉터를 활용한 유도용접으로 체결된 비전도성 열가소성 복합재 체결부 구조의 성능평가

초록

In this study, conductive Ag/PEEK susceptor films were used to induction-weld non-conductive glass fiber/PEEK (GF/PEEK) thermoplastic composites, and the welding performance was evaluated as a function of Ag content. Ag/PEEK films containing 40, 50, and 60 wt.% Ag were fabricated by mixing Ag nanoparticles and PEEK powder, and their electrical conductivity and heating characteristics were evaluated. Both electrical conductivity and heating performance increased with Ag content, with the 60 wt.% Ag/PEEK film exhibiting the highest values of 50,606 S/m and 439.4 °C, respectively. Non-destructive inspection and cross-sectional analysis showed that the 50 wt.% condition provided the most uniform weld quality. The specimens welded with the 50 wt.% film exhibited the highest interlaminar and single-lap shear strengths of 18.5 MPa and 12.3 MPa, respectively, corresponding to improvements of 79.6% and 127.7% over those welded using stainless steel mesh. The results demonstrate the applicability of Ag/PEEK conductive susceptors for induction welding of non-conductive GF/PEEK composites.

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