Journal
PLASTICS RUBBER AND COMPOSITES
Volume 45, Issue 10, Pages 430-435Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14658011.2016.1243507
Keywords
Silicone rubber; Oxyacetylene torch test; Anti-ablation filler; Zirconium boride; Back-face temperatures
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Funding
- General Program of Natural Science Foundation of China [51472048]
- International Cooperation Project [F16-214-6-00]
- General Project of Science and Technology Research Project from the Department of Science and Technology of the city of Shenyang [F15-199-1-18]
- Public-funded Projects Foundation of Liaoning Provincial Department of Science and Technology [2015004001]
- Shenyang Ligong University of an Open Fund of the Key Discipline for Materials Processing Engineering
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Hot vulcanised silicone rubber (HVSR) composites were prepared using silicon carbide (SiC), hafnium oxide (HfO2), zirconium oxide (ZrO2) and zirconium boride (ZrB2) as fillers, respectively. The tensile properties and the ablative response of the composites were examined. Tensile tests indicated that the tensile strength of HVSR was increased by the incorporation of ZrB2. The linear ablation rate of the composites increased in the order HVSR/ZrB2 < HVSR/ZrO2 < HVSR/SiC < HVSR/HfO2 < blank HVSR. The maximum back-face temperatures of the composites acquired from the burnt specimens during the ablation test were 350 and 364 K for the HVSR/ZrB2 and HVSR/ZrO2, respectively, compared to that of 333 K for the blank HVSR. Scanning electron microscopy and X-ray diffraction results showed that the dense and rigid ceramic layer was hard to peel off under the high pressure and shearing forces of ablative gases. The HVSR/ZrB2 specimens exhibited the best ablation resistance among all the composites involved in this work.
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