Abstract
Plastic deformation in fine-grain (i.e., ≤ 10 µ)ceramics is discussed. It is shown that fine-grain polycrystals can be exceptionally ductile, the fine grain size enhancing diffusional deformation and grain boundary sliding processes. The deformation is sensitive to both grain size and temperature.
The influence of grain size (1–10 µ),strain-rate (2 × 10−6 −3 × 10−4/sec), and temperature (1100–1700°C) on the deformation of fine-grain alumina has been studied. It is suggested that the predominant deformation mechanism in the larger grained polycrystals is diffusional creep, and that grain boundary sliding makes an increasingly important contribution as the grain size is decreased; in addition, deformation twinning can also be important. These results are shown to be consistent with previous work on deformation in polycrystalline alumina. A brief review of the literature on plastic deformation in fine-grain magnesia, beryllia, thoria, and Urania indicates that grain boundary sliding may be important for each of these materials as well.
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References
Gilman, J. J., “Monocrystals in Mechanical Technology,” Trans. ASM, 59 (1966), 596.
Groves, G. W. and Kelly, A., “Independent Slip Systems in Crystals,” Phil. Mag., 8 (1963), 877.
Day, R. B. and Stokes, R. J., “Mechanical Behavior of MgO at High Temperatures,” J. Am. Ceram. Soc., 47 (1964), 493.
Day, R. B. and Stokes, R. J., “Mechanical Behavior of MgO at High Temperatures,” ibid., “Effect of Crystal Orientation on the Mechanical Behavior of MgO at High Temperatures,” J. Am. Ceram. Soc., 49 (1966), 72.
Copley. S. M. and Pask, J. A., “Deformation of Polycrystalline MgO at Elevated Temperatures,” J. Am. Ceram. Soc., 48 (1965), 636.
Nadeau, J. S., “The Strength of Oxygen-rich UO2 at High Temperatures,” to be published in J. Am. Ceram. Soc.
Crussard, C. and Friedel, J., Creep and Fracture of Metals, London, H. M. Stationery Office (1956), 243.
Ishida, Y. and Henderson-Brown, N., “Dislocations in Grain Boundaries and Grain Boundary Sliding,” Acta Met., 15 (1967), 857.
Heuer, A. H., “Deformation Twinning in Corundum,” Phil. Mag., 3 (1966), 379.
Stofel, E. and Conrad, H., “Fracture and Twinning in Sapphire (ct-Al2O3) Crystals,” Trans. AIME, 227 (1963), 1053.
Conrad, H., Janowski, J. and Stofel, E., “Additional Observations on Twinning in Sapphire (a-Al2O3) During Compression,” ibid., 2333 (1965), 255.
Nabarro, F. R. N., Report of a Conference on the Strength of Solids, Physical Society, London (1948), 75.
Herring, C., “Diffusional Viscosity of a Polycrystalline Solid,” J. Appl. Phys., 21 (1950), 437.
Coble, R. L., “Model for Boundary Diffusion Controlled Creep,” ibid., 34 (1963), 1679.
Gifkins, R. C., “Diffusional Creep Mechanisms,” J. Am. Ceram. Soc., 51 (1968), 69.
Ryan, H. F. and Suiter, J. W., “Grain Boundary Topography in Tungsten,” Phil. Mag., 10 (1964), 727.
Hensler, J. H. and Cullen, G. V., “Grain Shape Change During Creep in MgO,” J. Am. Ceram. Soc., 50 (1967), 584.
Lifshitz, I. M., “On the Theory of Diffusion-Viscous Flow of Polycrystalline Bodies,” Soviet Physics JETP, 17 (1963), 909.
Gibbs, G. B., “The Role of Grain-Boundary Sliding in High-Temperature Creep,” Mat. Sci. and Eng., 2 (1967–68), 269.
Turnbaugh, J. E. and Norton, F. H., “Low-Frequency Grain-Boundary Relaxation in Alumina,” J. Am. Ceram. Soc., 51 (1968), 344.
Stevens, R. N., “Grain Boundary Sliding in Metals,” Met. Rev., 11 (1966), 129.
Gifkins, R. C., Gittins, A., Bell, R. L. and Langdon, T. G., “The Dependence of Grain Boundary Sliding on Shear Stress,” J. Mat. Sci., 3 (1968), 306.
Gifkins, R. C. and Snowden, K. U., “The Stress Sensitivity of Creep of Pb at Low Stresses,” Trans. AIME, 239 (1967), 910.
Bell, R. L. and Langdon, T. G., “An Investigation of Grain-Boundary Sliding During Creep,” J. Mat. Sci., 2 (1967), 313.
Alden, T. H., “The Origin of Superplasticity in the Sn-5% Bi Alloy,” Acta Met., 15 (1967), 469.
Alden, T. H., “The Origin of Superplasticity in the Sn-5% Bi Alloy,” Alden, T. H., J. of Metals, 20 (1968), 39A.
Heuer, A. H. and Cannon, R. M., “Plastic Deformation of Fine-Grained Aluminum Oxide,” presented at Symposium on Mechanical Testing Procedures for Brittle Materials, March 28–30, 1967, IIT Research Inst., Chicago, Ill., to be published.
Spriggs, R. M., Mitchell, J. B. and Vasilos, T., “Mechanical Properties of Pure, Dense Al2O3 as a Function of Temperature and Grain Size,” J. Am. Ceram. Soc., 47 (1964), 323.
Passmore, E. M., Moschetti, A. and Vasilos, T., “Brittle-Ductile Transition in Polycrystalline Al2O3,” Phil. Mag., 13 (1966), 1157.
Hewson, C. W. and Kingery, W. D., “Effect of MgO and Mg TiO3 Doping on Diffusion Controlled Creep of Polycrystalline Al2O3,” J. Am. Ceram. Soc., 50 (1967), 218.
Kronberg, M. L., “Dynamical Flow Properties of Single Crystals of Sapphire, I, ” J. Am. Ceram. Soc., 45 (1962), 274.
Weertman, J., “Theory of Steady State Creep Based on Dislocation Climb,” J. Appl. Phys., 26 (1955), 1213.
Weertman, J., “Theory of Steady State Creep Based on Dislocation Climb,” ibid., “Steady State Creep Through Dislocation Climb,”J. Appl. Phys., 28 (1957), 362.
Weertman, J., “Theory of Steady State Creep Based on Dislocation Climb,” ibid., “Steady State Creep of Crystals,” J. Appl. Phys., 28 (1957), 1185.
Zener, C. and Holloman, J. H., “Plastic Flow and Rupture of Metals,” Trans. ASM, 33 (1944), 163.
Zener, C. and Holloman, J. H., “Plastic Flow and Rupture of Metals,” ibid., “Effect of Strain Rate Upon Plastic Flow of Steel,” J. Appl. Phys., 15 (1944), 22.
Sherby, O. D and Burke, P. M., “Mechanical Behavior of Crystalline Solids at Elevated Temperatures,” Prog. Mat. Sci., 13 (1967), 325.
Heuer, A. H., Sellers, D. and Rhodes, W. H., “Hot Working in Aluminum Oxide: Primary Recrystallization and Texture,” to be published. See also: Heuer A. H., “Plastic Deformation in Polycrystalline Alumina,” Proc. Brit. Ceram. Soc.,15, in press.
Tighe, N. J. and Heuer, A. H., “Substructure of Hot-Pressed Polycrystalline AI2O3,” Bull. Am. Ceram. Soc., 47 (1968), 349.
Barrett, C. R., Lytton, J. L. and Sherby, D., “Effect of Grain Size and Annealing Treatment on Steady State Creep of Copper,” Trans. AIME, 239 (1967), 170.
Folweiler, R. C., “Creep Behavior of Pore-Free Polycrystalline Aluminum Oxide,” J. Appl. Phys., 32 (1961), 773.
Warshaw, S. I. and Norton, F. H., “Deformation Behavior of Polycrystalline Aluminum Oxide,” J. Am. Ceram. Soc., 45 (1962), 479.
Coble. R. L. and Guerard, Y. H., “Creep of Polycrystalline Aluminum Oxide,” ibid., 46 (1963), 353.
Passmore, E. M. and Vasilos, T., “Creep of Dense, Pure, Fine-Grained Aluminum Oxide,” ibid., 49 (1966), 166.
Rhodes, H., Sellers, D. and Heuer, A. H., to be published.
Oishi, Y. and Kingery, W. D., “Self-Diffusion of Oxygen in Single-Crystal and Polycrystalline Aluminum Oxide,” J. Chem. Phys., 33 (1960), 480.
Paladino, A. E. and Kingery, W. D., “Aluminum Ion Diffusion in Aluminum Oxide,” ibid., 37 (1962), 957.
Mistier, R. E., “Grain Boundary Diffusion and Boundary Migration Kinetics in Aluminum Oxide, Sodium Chloride, and Silver,” Sc.D. Thesis, Massachussets Institue of Technology (1967).
Johnson, D. L. and Berrin, L., “Grain Boundary Diffusion in the Sintering of Oxides,” in Sintering and Related Phenomena, G. C. Kuczynski, N. A. Hooton, and C. G. Gibbon, eds., Gordon and Breach, Science Publishers, New York (1967).
Chang, R., “Diffusion-Controlled Deformation and Shape Changes in Nonfissionable Ceramics,” in Proceedings of the Conference on Nuclear Application of Non-fissionable Ceramics, A. Boltax and J. H. Handwerk, eds., American Nuclear Society, Hinsdale, Ill. (1966).
Vasilos, T., Mitchell, J. B. and Spriggs, R. M., “Creep of Polycrystalline Magnesia,” J. Am. Ceram. Soc., 47 (1964), 203.
Passmore, E., Duff, R. H. and Vasilos, T., “Creep of Dense, Polycrystalline Magnesia,” ibid., 49 (1966), 594.
Scott, R., Hall, A. R. and Williams, J., “The Plastic Deformation of Uranium Oxides Above 800°C,” J. Nucl. Mat., 1 (1959), 39.
Armstrong, W. M., Irvine, W. R. and Martinson, R. H., “Creep Deformation of Stoichiometric UO2,” ibid., 7 (1962), 133.
Armstrong, W. M. and Irvine, W. R., “Creep Deformation of Non-Stoichiometric UO2,” ibid., 9 (1963), 121.
Fryxwell, R. E. and Chandler, B. A., “Creep Strength, Expansion, and Elastic Moduli of Sintered BeO as a Function of Grain Size, Porosity, and Grain Orientation,” J. Am. Ceram. Soc., 47 (1964), 283.
Poteat, L. E. and Yust, C. E., “Creep of Polycrystalline ThO2,” ibid., 49 (1966), 410.
Tagai, H. and Zisner, T., “High-Temperature Creep of Polycrystalline Magnesia: I, Effect of Simultaneous Grain Growth,” ibid., 51 (1968), 303.
Gordon, R. S., Terwilliger, G. R., Bowen, H. K. and Marchant, D. D., Impurity Effects on the Creep of Polycrystalline Magnesium and Aluminum Oxides at Elevated Temperatures, AEC AT (11–1)-1591 (December 1967).
Terwilliger, G. R., “Creep of Polycrystalline Magnesia,” Ph.D. Thesis, University of Utah (1968); and Gordon, R. S., Private communication, September 1968.
Fryer, G. M. and Roberts, J. P., “Tensile Creep of Porous Polycrystalline Alumina,” Proc. Brit. Ceram. Soc., 6 (1969), 225.
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Heuer, A.H., Cannon, R.M., Tighe, N.J. (1970). Plastic Deformation in Fine-Grain Ceramics. In: Burke, J.J., Reed, N.L., Weiss, V. (eds) Ultrafine-Grain Ceramics. Sagamore Army Materials Research Conference Proceedings, vol 15. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-2643-4_16
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