Causes and remedies for porosity in composite manufacturing

[摘要] Porosity is a challenge in virtually all composite processes but in particular in low pressure processes such as out of autoclave processing of prepregs, where the maximum pressure is one atmosphere. This paper discusses the physics behind important transport phenomena that control porosity and how we can use our understanding of the underlying science to develop strategies to achieve low porosity for these materials and processes in an industrial setting. A three step approach is outlined that addresses and discusses: gas evacuation of trapped air, volatiles and off-gassing, and resin infiltration of evacuated void space.

[发布机构] Department of Materials Engineering, University of British Columbia, 309-6350 Stores Rd., Vancouver; BC; V6T 1Z4, Canada^1

[关键词] Composite manufacturing;Composite process;Industrial settings;Low pressure process;Materials and process;Resin infiltrations;Three-step approach;Transport phenomena