Influence of Compressive Pressure, Vacuum Pressure, and Holding Temperature Applied during Autoclave Curing on the Microstructure of Unidirectional CFRP Composites

Sudarisman Sudarisman; Ian J. Davies

doi:10.4028/www.scientific.net/AMR.41-42.323

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Influence of Compressive Pressure, Vacuum Pressure, and Holding Temperature Applied during Autoclave Curing on the Microstructure of Unidirectional CFRP Composites

Abstract:

The microstructure (i.e., fibre volume fraction, void content, and fibre misalignment) of unidirectional carbon fibre-reinforced polymer (CFRP) composites was optimised by controlling several parameters during manufacture, namely: (i) compressive pressure (0.25~1.25 MPa, in steps of 0.25 MPa), (ii) vacuum pressure (−0.15, −0.20, −0.30, −0.45, and −0.65 MPa), and (iii) holding temperature (100~140 oC, in steps of 10 oC), applied during autoclave curing with the holding time being 30 minutes for all specimens. Optical micrographs captured from cross-sectional, through-the thickness areas, and in-plane areas of the resulting composites were evaluated and analysed in order to describe their microstructural characteristics.