Journal
SCRIPTA MATERIALIA
Volume 63, Issue 2, Pages 200-203Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2010.03.052
Keywords
Nano silica; Fiber reinforced composites; Erosion; Thermal conductivity
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High ablation resistant carbon-phenolic (C-Ph) composites were fabricated by the addition of nano silica powder and tested under plasma arc jet at a flux of 2.5 MW m(-2). Nano silica C-Ph composites exhibited much higher ablation resistance compared to conventional C-Ph composites under similar conditions. Microstructure and X-ray diffraction studies reveal that nano silica reacts with char at high-temperature, forming ablation resistant silicon carbide phase. The mechanism of in situ siliconization and the thermophysical properties of the C-Ph composites are discussed. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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