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Influence du désensimage par traitement thermique sur les propriétés mécaniques de fibres de basalte

Abstract : This study deals with the effects of desizing by heat cleaning on the mechanical properties of basalt fibers. The heat treatment at 350°C for 10h, considered in this work, leads to a complete desizing of the fibers. The mechanical properties of basalt fibers before and after desizing were investigated by single fiber tensile tests. The tensile strength is reduced of 34% after desizing while no evolution of the Young’s modulus is observed. SEM micrographs reveals that the defects located on the fibers surface are at the origin of the failure. Moreover, since the basalt structure is not modified during the treatment, the strength loss is only ascribed to sizing layer removal. In fact, the desizing reveals the surface flaws of the fibers and increases their criticality. Tensile specimens of unidirectional composite materials were produced with an epoxy matrix and tested by considering both fibers states. The differences of mechanical properties observed for the composite parts corresponds to those observed for single fibers. As a consequence, in the composite, the matrix is not able to play the protective role of the sizing.
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Submitted on : Sunday, August 11, 2019 - 10:31:04 AM
Last modification on : Tuesday, October 25, 2022 - 11:58:11 AM
Long-term archiving on: : Thursday, January 9, 2020 - 8:06:05 PM


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  • HAL Id : hal-02265265, version 1


Florian Boutenel, Gilles Dusserre, Thierry Cutard. Influence du désensimage par traitement thermique sur les propriétés mécaniques de fibres de basalte. JNC 21 : Journées Nationales sur les Composites 2019, Jul 2019, Bordeaux, France. 9 p. ⟨hal-02265265⟩



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