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Strength Loss of Basalt-Based Mineral Fibers after Thermal Desizing

Abstract : This study investigates the effects of desizing by heat cleaning on tensile properties of basalt-based mineral fibers. Two heat treatments, which lead to a complete removal of the sizing layer, were considered: one at low temperature (350°C) for a long time (10 h) and one at high temperature (600°C) for a short time (35 min). Desizing greatly affects tensile strength. High temperature and short time treatment conditions lead to the most severe strength degradation (66%). SEM micrographs reveal that failure originates from surface defects. Mechanisms responsible for strength loss were investigated by X-ray diffraction analyses, density measurements and differential thermal analyses. Strength degradation is ascribed to sizing layer removal and to thermally activated structural rearrangement of basalt.
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Submitted on : Monday, September 21, 2020 - 2:51:15 PM
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Florian Boutenel, Gilles Dusserre, Thierry Cutard. Strength Loss of Basalt-Based Mineral Fibers after Thermal Desizing. Revue des composites et des matériaux avancés, Lavoisier, 2020, 30 (3-4), pp.115-122. ⟨10.18280/rcma.303-401⟩. ⟨hal-02944406⟩

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