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IN-SITU SCANNING ACOUSTIC MICROSCOPY OF CRACK BRIDGING IN ALUMINA

Abstract:

High-resolution scanning acoustic microscopy has been used to observe crack bridging in a fine-grained polycrystalline alumina. The microscope is sensitive to the increased acoustic transmission across the crack from the interlocking and sliding asperities that cause crack shielding and -curve behaviour. Acoustic microscopy is found to be more reliable than optical microscopy for characterising crack bridging. The bridging zone size, bridge density and bridge failure strain are easily determi...

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Publication status:
Published

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Institution:
University of Oxford
Department:
Oxford, MPLS, Materials
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Materials
Journal:
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume:
14
Issue:
2
Pages:
111-116
Publication date:
1994
DOI:
ISSN:
0955-2219
URN:
uuid:80f82557-7fa1-4be2-bb04-5e79ccda5049
Source identifiers:
8797
Local pid:
pubs:8797

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