The crack-initiation threshold in ceramic materials subject to elastic/plastic indentation
- 379 Downloads
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
Unable to display preview. Download preview PDF.
- 1.B. R. Lawn andA. G. Evans,J. Mater. Sci. 12 (1977) 2195.Google Scholar
- 2.C. M. Perrott,Wear 45 (1977) 293.Google Scholar
- 3.J. Lankford, ″Fracture Mechanics of Ceramics, Vol. 3, edited by R. C. Bradt, D. P. H. Hasselman and F. F. Lange (Plenum, New York, 1978) p. 245.Google Scholar
- 4.B. J. Hockey, ″The Science of Hardness Testing and its Research Applications″, edited by J. H. Westbrook and H. Conrad (American Society for Metals, Metals Park, Ohio, 1973) p. 30.Google Scholar
- 5.B. R. Lawn, T. Jensen andA. Arora,J. Mater. Sci. 11 (1976) 575.Google Scholar
- 6.B. R. Lawn andE. R. Fuller,ibid 10 (1975) 2016.Google Scholar
- 7.T. Sata, K. Takamoto andH. Yoshikawa,Bull. Jap. Soc. Prec. Eng. 3 (1969) 13.Google Scholar
- 8.J. Lankford andD. L. Davidson,J. Mater. Sci. 14 (1979) 1669.Google Scholar
- 9.B. J. Hockey, S. M. Weiderhorn andH. Johnson, ″Fracture Mechanics of Ceramics″, Vol. 3, edited by R. C. Bradt, D. P. Hasselman and F. F. Lange (Plenum, New York, 1978) p. 379.Google Scholar