25-27 November 2015
National Centre for Synchrotron Science
Australia/Melbourne timezone

Structural damage evaluation of a ceramic matrix composite

27 Nov 2015, 13:30
National Centre for Synchrotron Science

National Centre for Synchrotron Science

Australian Synchrotron 800 Blackburn Road Clayton VIC 3168
Board: AM-06
Poster Advanced Materials Poster Session 2


Dr Benedicta Arhatari (La Trobe University)


We studied Ceramic Matrix Composites (CMC) as a new class of structural materials that combine high strength at high temperatures with moderate toughness. Mapping the failure of CMC under mechanical load explains the mechanisms responsible for their toughness. In this study, the correlation of the x-ray radiographs of CMC samples to critical points in the load/displacement curve show that the fibre bundles slowed crack propagation due to strain energy being expended in breaking these fibres and in pulling bundles out of the surrounding matrix material. The results were also complemented with micro X-ray Computed Tomography after failure. Finally, mapping the strain evolution at length scales of micrometres during bending were done using Digital Image Correlation.
Keywords composite, tomography, X-rays, mechanical test

Primary author

Dr Benedicta Arhatari (La Trobe University)


Dr Brian Abbey (La Trobe University) Dr John Thornton (Defence Science and Technology Organisation) Mr Matthew Zonneveldt (Defence Science and Technology Organisation)

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