Infrared welding process on composite: Effect of interdiffusion at the welding interface

Abstract : In this study, the effects of the welding temperature field developed during the infrared assembly process on the joining properties of glass fibre reinforced polycarbonate/ unreinforced polycarbonate with carbon black were investigated. The temperature field and the contact time govern together the quality of the adhesion at the welding interface. The effect of the semi-transparent glass fibre reinforced polycarbonate composite / unreinforced polycarbonate composite with carbon black interface was quantified in term of quadratic distance of diffusion or diffusion depth through the welding interface. The microstructural characterizations were investigated in order to inspect the welding zones quality and to observe their failure modes. The diffusion theory has then been applied to calculate the variation of the quadratic distance of diffusion versus time at different locations. The complete self-diffusion is supposed occurring only at temperature above the polycarbonate glass transition temperature (140 degrees C) and with a quadratic distance of diffusion superior to the mean square end-to-end distance.
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Andre Chateau Akue Asseko, Eric Lafranche, Benoît Cosson, Fabrice Schmidt, Yannick Le Maoult. Infrared welding process on composite: Effect of interdiffusion at the welding interface. ESAFORM 2016 - 19th International ESAFORM Conference on Material Forming, Apr 2016, Nantes, France. art.020011 - 6 p., ⟨10.1063/1.4963415⟩. ⟨hal-01609023⟩

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