Electron microprobe imaging for the characterization of polymer matrix composites

Published: 2004

Author(s):
Goodell, B.
Herzog, B.
Lopez-Anido, R.

Publication Name: Composites Part A: Applied Science and Manufacturing

Publication URL: https://www.sciencedirect.com/science/article/pii/S1359835X04000648?via%3Dihub

Research Area:
Keywords:
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Abstract:

Traditionally, image analysis of polymer matrix composite (PMC) materials has been achieved through optical microscopy and, to a lesser extent, scanning electron microscopy. In this study, image analysis using an electron microprobe in backscatter mode is introduced as a method to provide a qualitative comparison of void content and fiber packing in PMC materials. Composite parts were fabricated using a vacuum-assisted resin transfer molding (VARTM) process and another process known as the composites pressure resin infusion system (ComPRIS). Voids were observed in the composite specimens fabricated by the VARTM process, where resin infusion is driven by vacuum. No significant voids were observed in the composite specimens fabricated by the ComPRIS process, where resin infusion is driven by pressure. The apparent difference in void content is attributed to the difference in the resin infusion driving force, i.e. vacuum versus pressure. Backscattered electron imaging of samples using an electron microprobe proved to be a suitable technique for imaging PMC surfaces.