【摘 要】
：
Improved Resin Transfer Molding (RTM)technology and equipment were established.Void content and morphology of the 3-D braided preform/phenolic composite were in
【机 构】
：
Key Laboratory for Advanced Textile Composite of Ministry of Education
论文部分内容阅读
Improved Resin Transfer Molding (RTM)technology and equipment were established.Void content and morphology of the 3-D braided preform/phenolic composite were investigated using different RTM processes.The results showed that void content of the vacuum and compression co-assisted RTM process was the lowest.Void morphologies of the specimen cross-section were analyzed with metallographic microscope.In traditional RTM process, the crack of eross-section was in evidenoe.In vacuum assisted RTM process, the void shape was divided into three categories: irregular crack, triangle, rotundity and ellipse.The most voids distributed in resin rich areas and were observed as large void based on equivalent diameter.In compression assisted RTM, vacuum and compression co-assisted RTM process, the polygonal voids mostly existed inter tows.Void size was mainly intermediate and small based equivalent diameter separately.
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