Abstract
A relatively simple indentation technique for the rapid measurement of fracture surface energy, Γ, of small samples is described. The reliability of this technique is assessed by testing soda-lime glass for which there are good independent fracture mechanics determinations of fracture surface energy. The indentation technique gives a value for Γ of 4.33 J m−2 which compares favourably with the accepted value of 3.8 J m−2. Fracture surface energies of the {010} and {001} cleavage planes of single crystal olivine (modal composition Fo88Fa12) are then determined and compared with theoretical estimates of the thermodynamic surface energy, γ, calculated from atomistic parameters (γ is equal to Γ in the absence of dissipative processes during crack extension). The experimental values for Г{010} and Г{001} are respectively 0.98 J m−2 and 1.26 J m−2. The calculated values of γ{010} and γ{001} are respectively in the range from 0.37 J m−2 to 8.63 J m−2 and 12.06 J m−2. The particular advantages of the indentation technique for the study of the fracture surface energies of geological materials are outlined.
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References
Birle, J. D., Gibbs, G. V., Moore, P. B. andSmith, J. V. (1968),Crystal structures of natural olivines, American Mineralogist53, 807–824.
Brace, W. F. andWalsh, J. B. (1962),Some direct measurements of the surface energy of quartz and orthoclase. American Mineralogist47, 1111–1122.
Deer, W. A., Howie, R. A. andZussman, J.,Rock-forming Minerals, Vol. 1. Ortho- and Ring-Silicates (Longmans, London 1962).
Friedman, M., Handin, J. andAlani, G. (1973),Fracture-surface energy of rocks, Int. J. Rock Mech. Min. Sci.9, 757–766.
Gilman, J. J. (1960),Direct measurements of the surface energies of crystals, J. Appl. Phys.31, 2208–2218.
Hartley, N. E. W. andWilshaw, T. R. (1973),Deformation and fracture of synthetic α-quartz, J. Materials Sci.8, 265–278.
Kumazawa, M. andAnderson, O. L. (1969),Elastic moduli, pressure derivatives, and temperature derivatives of single crystal olivine and single crystal forsterite. J. Geophysical Res.74, 5961–5972.
Lawn, B. R. (1975),An atomistic model of kinetic crack growth in brittle solids, J. Materials Sci.10, 469–480.
Lawn, B. R. andSwain, M. V. (1975),Microfracture beneath point indentations in brittle solids, J. Materials Sci.10, 113–122.
Lawn, B. R. andWilshaw, T. R.,Fracture of Brittle Solids (Cambridge University Press, Cambridge 1975a), 204 pp.
Lawn, B. R. andWilshaw, T. R. (1975b),Indentation fracture: principles and applications, J. Materials Sci.10, 1049–1081.
Lawn, B. R., Swain, M. V. andPhilips, K. (1975),On the mode of chipping fracture in brittle solids, J. Materials Sci.10, 1236–1239.
Nye, J. F.,Physical Properties of Crystals (Oxford University Press, Oxford 1957), 322 pp.
Swain, M. V. andLawn, B. R. (1976),Indentation fracture of brittle rocks and glasses, Int. J. Rock Mech., Min. Sci. and Geomech, Abstr.13, 311–319.
Wiederhorn, S. M. (1969),Fracture surface energy of glass, J. American Ceramic Soc.52, 99–105.
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Swain, M.V., Atkinson, B.K. Fracture surface energy of olivine. PAGEOPH 116, 866–872 (1978). https://doi.org/10.1007/BF00876542
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DOI: https://doi.org/10.1007/BF00876542