Abstract
The fracture toughness of MgO has been studied as a function of the concentration of an intergranular LiF phase, added to enhance densification. The fracture toughness increases as lithium and fluorine are volatilized from the MgO while the fracture morphology changes from intergranular to transgranular. The data are interpreted with respect to competing embrittlement and crack-deflection toughening mechanisms, and a scheme is proposed for determining conditions for embrittlement and toughening.
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References
J. H. Westbrook andD. L. Wood,Nature 192 (1961) 1280.
C. J. McMahon Jr,Mater. Sci. Engng 42 (1980) 215.
M. H. Leipold,J. Amer. Ceram. Soc. 49 (1966) 498.
J. R. H. Black andW. D. Kingery,ibid. 62 (1979) 176.
Y. M. Chiang, A. F. Henriksen andW. D. Kingery,ibid. 64 (1981) 385.
H. L. Marcus andM.E. Fine,ibid. 55 (1972) 568.
W. C. Johnson andD. F. Stein,ibid. 58 (1975) 485.
A. W. Funkenbusch andD. W. Smith,Metall. Trans. 6A (1975) 2299.
R. S. Jupp, D. F. Stein andD. W. Smith.J. Mater. Sci. 15 (1980) 96.
G. Dewith andN. Hattu,ibid. 16 (1981) 841.
A. G. Evans, D. Gilling andR. W. Davidge,ibid. 5 (1970) 187.
R. W. Rice,Proc. Br. Ceram. Soc. 20 (1972) 329.
K. T. Faber andA. G. Evans,Acta Metall. 31 (1983) 565.
Idem,,J. Amer. Ceram. Soc. 66 (1983) C-94.
D. W. Johnson Jr., E. M. Vogel andB. B. Ghate, in “Ferrites”, edited by H. Watanabe, S. Iida and M. Sugimoto (Center for Academic Publications, Japan, 1980) p. 285.
G. K. Bansal andA. H. Heuer, in “Fracture Mechanics of Ceramics”, Vol. 2, edited by R. C. Bradt, D. P. H. Hasselman and F. F. Lange (Plenum, New York, 1974) p. 677.
M. I. Mendelson andM. E. Fine,J. Amer. Ceram. Soc. 57 (1974) 154.
R. W. Rice,Proc. Br. Ceram. Soc. 12 (1969) 99.
G. D., Miles et al., Trans. Br. Ceram. Soc. 66 (1967) 319.
M. W. Benecke, N. E. Olson andJ. A. Pask,J. Amer. Ceram. Soc. 50 (1967) 365.
P. E. Hart, R. B. Atkin andJ. A. Pask,ibid. 53 (1970) 83.
P. Chantikul et al., ibid. 64 (1981) 539.
D. B. Marshall, T. Noma andA. G. Evans,ibid. 65 (1982) C-175.
J. M. Haussonne et al., ibid. 66 (1983) 801.
W. C. Johnson, D. F. Stein andR. W. Rice,ibid. 57 (1974) 342.
L. Navias,ibid. 19 (1936) 1.
B. Henderson andJ. E. Wertz,Adv. Phys. 17 (1968) 749.
A. G. Evans andR. W. Davidge,Phil. Mag. 20 (1969) 373.
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Conner, C.L., Faber, K.T. Segregant-enhanced fracture in magnesium oxide. J Mater Sci 25, 2737–2742 (1990). https://doi.org/10.1007/BF00584873
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DOI: https://doi.org/10.1007/BF00584873