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TECHNICAL PAPERS

Tailoring the Microstructure of a Metal-Reinforced Ceramic Matrix Composite

[+] Author and Article Information
O. Sbaizero

Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, CO 80309

G. Pezzotti

Department of Materials, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan

J. Eng. Mater. Technol 122(3), 363-367 (Mar 16, 2000) (5 pages) doi:10.1115/1.482810 History: Received January 15, 2000; Revised March 16, 2000
Copyright © 2000 by ASME
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References

de Arellano-Lopez,  A. R., Smirnov,  B. I., Schuldies,  J. J., Park,  E. T., Goretta,  K. C., and Routbort,  J. L., 1998, “Fracture and creep of an Al2O3-SiC (whisker) TiC (particle) composite,” Int. J. Refract. Met. Hard Mater., 16, No. 4-6, pp. 337–341.
Becher,  P. F., Hsueh,  C. H., Alexander,  K. B., Lin,  H. T., Warwick,  W. K., Westmoreland,  C. G., and Waters,  S. B., 1995, “Structural ceramics incorporating whiskers, platelets and particulates phases,” Silicates Industr. 60, No. 9–10, pp. 239–249.
Krstic,  V. D., 1998, “Ceramic matrix composites-Present status and future trends,” Adv. Mater. Process, 282, No. 2, pp. 209–218.
Becher,  P. F., Hsueh,  C. H., Alexander,  K. B., and Sun,  E. Y., 1996, “Influence of reinforcement content and diameter on the R-curve response in SiC-whisker-reinforced alumina,” J. Am. Ceram. Soc., 79, No. 2, pp. 298–304.
Pezzotti,  G., Sbaizero,  O., Sergo,  V., Muraki,  N., Maruyama,  K., and Nishida,  T., 1998, “In situ measurements of frictional/bridging stresses in alumina using raman spectroscopy” J. Am. Ceram. Soc., 81, No. 1, pp. 187–921.
Pezzotti,  G., Muraki,  N., Maeda,  N., Satou,  K., and Nishida,  T., 1999, “In situ measurements of bridging stresses in toughened Si3N4 using raman microprobe spectroscopy,” J. Am. Ceram. Soc., 82, No. 5, pp. 1249–1256.
Grabner,  L., 1978, “Spectroscopy technique for the measurement of residual stress in sintered Al2O3” J. Appl. Phys., 49, No. 2, pp. 580–583.
Pezzotti,  G., Suenobu,  H., Nishida,  T., and Sbaizero,  O., 1999, “Measurement of microscopic bridging stresses in alumina/molybdenum composite by in situ fluorescence spectroscopy,” J. Am. Ceram. Soc., 82, No. 5, pp. 1257–1262.
Pezzotti,  G., 1999, “In situ study of fracture mechanisms in advanced ceramics using fluorescence and Raman microprobe spectroscopy,” J. Raman Spectrosc., 30, pp. 867–875.
He,  J., and Clarke,  D. R., 1995, “Determination of the Piezospectroscopic Coefficients for Chromium-Doped Sapphire,” J. Am. Ceram. Soc., 78, No. 5, pp. 1347–1353.
Pezzotti,  G., Okamoto,  Y., Nishida,  T., and Sakai,  M., 1996, “On the near-tip toughening by crack-face bridging in particulate and platelet-reinforced ceramics,” Acta Mater., 44, No. 3, pp. 899–914.
Irwin G. R., 1958, “Fracture,” Handbuch der Physik, Vol. 6, Springer-Verlag, Berlin, pp. 551–594.
Nojima,  T., and Nakai,  O., 1993, “Stable crack extension of an alumina ceramic in three-point bending test,” J. Sound Vib., 42, No. 475, pp. 412–418.
Nishida,  T., Hanaki,  Y., Nojima,  T., and Pezzotti,  G., 1995, “Measurement of Rising R-Curve Behavior in Toughened Silicon Nitride by Stable Crack Propagation in Bending,” J. Am. Ceram. Soc., p. 78, No. 11, pp. 3113–3116.
Nishida,  T., Hanaki,  Y., and Pezzotti,  G., 1995, “Effect of Notch-Root Radius on the Fracture Toughness of a Fine-Grained Alumina,” J. Am. Ceram. Soc., 77, No. 2, pp. 606–608.

Figures

Grahic Jump Location
Schematic picture of the 3-point bending stabilizer. Details of the notching procedure and the bending stabilizer can be found in previous papers 131415
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Microstructure of the hot-pressed composites (a) 20 vol percent of fine Mo particles, (b) 20 vol percent of coarse Mo particles
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R curves for the two composites. R-curves obtained through numerical integration of the Irwin equation are plotted as continuous lines.
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Typical linear map of the bridging stresses as a function of the distance from the crack tip for: (a) 10 vol percent, (b) 20 vol percent, (c) 30 vol percent of Mo
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Micrograph of in-situAl2O3/Mo during crack propagation

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