4.7 Article Proceedings Paper

Fabrication and properties of thermal insulating glass fiber reinforced composites from low temperature curable polyphosphate inorganic polymers

期刊

COMPOSITES SCIENCE AND TECHNOLOGY
卷 63, 期 3-4, 页码 493-499

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ELSEVIER SCI LTD
DOI: 10.1016/S0266-3538(02)00229-4

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ceramic-matrix composites (CMCs); preceramic polymer; curing; strength; thermal properties

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Glass fiber reinforced polymetalphosphate matrix composites prepared by a simple process displayed excellent thermal insulating and mechanical properties. Low-viscous Al3Cr(H2PO4)x = 9,12 binders were prepared by dissolving Al(OH)(3) and Cr(OH)(3) or CrO3 in 85% phosphoric acid, and mixed with Al2O3 and Cr2O3 fillers. The glass fiber pre-pregs impregnated by the binder solution were laid-up and cured at 150-200 degreesC for 12 h under pressure, which are similar conditions to those used for carbon fiber/phenolic resin matrix composites. The composites cured using the hot-press or autoclave showed outstanding hygroscopic resistance even after standing in air for 30 days, due to the chemical stability of the cured network. Hot-press cured composites with higher density exhibited maximum flexural strengths of 155 MPa and thermal conductivity in the range 1.12-3.45 W/mK, while the porous autoclave cured composites displayed 60-77 MPa and 0.4-0.6 W/mK, respectively. (C) 2002 Elsevier Science Ltd. All rights reserved.

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