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Fabrication Reliability of Ceramics: Controlling Flaw Populations

  • F.F. Lange (a1)

Abstract

The major hindrance in using structural ceramics in well defined engineering applications is their lack of reliability caused by uncontrolled flaw populations introduced during fabrication. Mechanical reliability is thus a matter of fabrication reliability. The strengthening that can be achieved by either eliminating or reducing the size of flaw populations through changing either processing or microstructure will be reviewed.

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1. Garvie, R.C., Hannink, R.H.J., and Pascoe, R.T., “Ceramic Steels?,” Nature (London) 258[5337], 703–4 (1977).
2. Gupta, T.K., Lange, F.F., and Bechtold, J.H., “Effect of Stress-Induced Phase Transformation on the Properties of Polycrystalline Zirconia Containing Metastable Tetragonal Phase,” J. Mat. Sci. 13[7], 1464–70 (1978).
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4. Green, D.J., Lange, F.F., and James, M.R., “Factor Influencing Residual Surface Stresses due to a Stress-Induced Phase Transformation,” J. Am. Ceram. Soc. 66[9], 623–29 (1983).
5. Green, D.J., “Compressive Surface Strengthening of Brittle Materials,” J. Mat. Sci. 19, 2165–71 (1984).
6. Lange, F.F., “Compressive Surface Stresses Developed in Ceramics by an Oxidation-Induced Phase Change,” J. Am. Ceram. Soc. 63[1–2], 3840 (1980).
7. Lange, F.F. and Metcalf, M., “Processing-Related Fracture Origins: II, Agglomerate Motion and Crack-Like Internal Surfaces Caused by Differential Sintering,” J. Am. Ceram. Soc. 66[6], 398406 (1983).
8. Lange, F.F., “Processing Related Fracture Origins: I. Observations in Sintered and Isostatically Hot-Pressed Composites,” J. Am. Ceram. Soc. 66[6], 398–8 (1983).
9. Aksay, I.A., Lange, F.F. and Davis, B.I., “Uniformity of Al2O3-ZrO2 Composites by Colloidal Filtration,” J. Am. Ceram. Soc. 66[10], C-190 (1983).
10. Lange, F.F., Davis, B.I. and Aksay, I.A., “Processing Related Fracture Origins: Part III. Differential Sintering of ZrO2 Agglomerates in Al2O3/ZrO2 Composites,” J. Am. Ceram. Soc. 66[6], 407–8 (1983).
11. Lange, F.F., Davis, B.I., and Wright, E., “Processing-Related Fracture Origins: IV, Elimination of Voids Produced by Organic Inclusions,” J. Am. Ceram. Soc. (in press).
12. Engle, V. and Hubner, H., “Strength Improvement of Cemented Carbides by Hot Isostatic Pressing,” J. Mater. Sci., 13[9], 2003–13 (1978).
13. Kellett, B.J. and Lange, F.F. (to be published).
14. Lange, F.F., “Criteria for Crack Extension and Arrest in Residual, Localized Stress Fields Associated with Second Phases,” in Fracture Mechanics of Ceramics, Vol. 2 eds., Bradt, R.C., Hasselman, D.P.H. and Lange, F.F., Plenum Press (1974), pp. 599609.
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17. Tsukuma, K., Ueda, K., and Shimada, M., “Strength and Fracture Toughness of Isostatically Hot-Pressed Composites of Al2O3 and Y2O3-Partially-Stabilized ZrO2,” J. Am. Ceram. Soc. 68[1], C4–5 (1985).
18. Lange, F.F., “Fracture Mechanics and Microstructual Design,” Fracture Mechanics of Ceramics, ed by Bradt, R.C., Hasselman, D.P.H., and Lange, F.F., Vol 4, p 799 Plenum Press (1978).
19. Lange, F.F., “Transfromation Toughened ZrO2: Correlation Between Grain Growth and Compositions for Material in the ZrO2-Y2O3 System,” J. Am. Ceram. Soc. (in press).
20. Lange, F.F. and Hirlinger, M.M., “Hindrance of Grain Growth in Al2O3 by ZrO2 Inclusions,” J. Am. Ceram. Soc. 67[3], 164 (1984).
21. Green, D.J., “Transformation Toughening and Grain Size Control in β′-Al2O3/ZrO2 Composites,” J. Mat. Sci. 20, 2639–46 (1985).

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