Graphite sheet coating for improved thermal oxidative stability of carbon fiber reinforced/PMR-15 composites
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- 作者：S ; i Miller ; Demetrios Papadopoulos ; Paula Heimann ; Linda Inghram ; Linda McCorkle
- 关键词：A. Polymer matrix composites ; B. High temperature properties ; A. Coating ; A. Hybrid compounds
- 刊名：Composites Science and Technology
- 出版年：2007
- 出版时间：August 2007
- 年：2007
- 卷：67
- 期：10
- 页码：2183-2190
- 全文大小：1981 K
文摘
Expanded graphite was compressed into graphite sheets and used as a coating for carbon fiber reinforced PMR-15 composites. BET analysis of the graphite indicated an increase in graphite pore size on compression, however the material was proven to be an effective barrier to oxygen when prepreged with PMR-15 resin. Oxygen permeability of the PMR-15/graphite was an order of magnitude lower than the compressed graphite sheet. By providing a barrier to oxygen permeation, the rate of oxidative degradation of PMR-15 resin was decreased. As a result, the composite thermo-oxidative stability increased by up to 25 % . The addition of a graphite sheet as a top ply on the composites yielded little change in the material’s flexural strength or interlaminar shear strength.