The crack-initiation threshold in ceramic materials subject to elastic/plastic indentation
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The threshold for indentation cracking is established for a range of ceramic materials, using the techniques of scanning electron microscopy and acoustic emission. It is found that by taking into account indentation plasticity, currant theories may be successfully combined to predict threshold indentation loads and crack sizes. Threshold cracking is seen to relate to radial rather than median cracking.
KeywordsPolymer Microscopy Electron Microscopy Scanning Electron Microscopy Acoustic Emission
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