MICROMECHANICS OF MODEL CARBON EPOXY COMPOSITES CURED USING MICROWAVE HEATING

R.J. Day, E. Samoladas
1998 Science and Engineering of Composite Materials  
In principle microwave heating could be used for the manufacture of composites. The effect upon the properties of the materials produced, however, needs to be established before the technique can be used with confidence. In this paper Raman spectroscopy has been used to evaluate the micromechanical properties of model carbon/epoxy composites post-cured using microwave heating compared to those of model composites post-cured using conventional convection heating. The results presented here for
more » ... resented here for the two heating techniques are similar. Some residual stress is induced in the fibre which can be overcome as the matrix strain is increased. Failure in all cases is due to debonding because the fibres used in this study did not have any surface treatment and had smooth surfaces. There was thus no possibility of chemical reaction or mechanical interlocking. The use of a post-cure temperature of 150 °C gave rise to residual stresses on cooling which were sufficiently high to cause interfacial failure without any external load.
doi:10.1515/secm.1998.7.1-2.23 fatcat:uji6xujwarasncgokyfpkk4rvi