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Manufacture of CF/PEEK composites from powder/sheath fibre preforms

Author:
Ye, L.   Friedrich, K.   Cutolo, D.   Savadori, A.  


Journal:
Composites Manufacturing


Issue Date:
1994


Abstract(summary):

The relationships between impregnation mechanisms, consolidation quality and processing conditions during manufacture of carbon fibre/polyetheretherketone (CF/PEEK) composites from powder/sheath fibre bundle preforms were investigated. Microscopy of cross-sections and density measurements were used to examine the quality of impregnation and consolidation. The consolidation process of composite laminates made from these material preforms can basically be divided into two steps: compaction and impregnation. Variations of void content in the laminates as a function of both bundle geometry and combinations of processing variables were estimated using an impregnation model. Effects of variations in bundle geometry and shape ratio on impregnation behaviour are discussed. Results of transverse flexure tests were used to correlate mechanical properties with impregnation quality, in particular the void content in the laminates. Finally, the optimum processing windows for the manufacture of laminates from CF/PEEK-3k and -6k preforms are suggested.


Page:
41-50


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