These volumes, 9 and 10, of Fracture Mechanics of Ceramics constitute the proceedings of an international symposium on the fracture mechanics of ceramic materials held at the Japan Fine Ceramics Center, Nagoya, Japan on July 15, 16, 17, 1991. These proceedings constitute the fifth pair of volumes of a continuing series of conferences. Volumes 1 and 2 were from the 1973 symposium, volumes 3 and 4 from a 1977 symposium, and volumes 5 and 6 from a 1981 symposium all of which were held at The Pennsylvania State University. Volumes 7 and 8 are from the 1985 symposium which was held at the Virginia Polytechnic Institute and State University. The theme ofthis conference, as for the previous four, focused on the mechanical behavior ofceramic materials in terms of the characteristics ofcracks, particularly the roles which they assume in the fracture processes and mechanisms. The 82 contributed papers by over 150 authors and co-authors represent the current state of that field. They address many of the theoretical and practical problems ofinterest to those scientists and engineers concerned with brittle fracture.

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Dissipative Processes Accompanying Fracture; J.T. Dickinson, et al. FractoEmission from Ceramics at Cryogenic Temperatures; S. Owaki, et al. The Influence of The Network of Microcracks upon the Crack Propagation Behavior Inside of Transparent Zirconia; K. Ahlborn, et al. Critical Stress of Microcracking in Alumina Evaluated by Acoustic Emission; S. Wakayama, H. Nishimura. Analysis of Precracking Parameters for Single-Edge-Precracked Beam Specimens; S.R. Choi, et al. Elevated-Temperature Fracture Resistances of Monolithic and Composite Ceramics Using Chevron-Notched Bend Tests; A. Ghosh, et al. Reliability of Ceramics Fracture Toughness Measurements by Indentation; S.N. Dub, A.L. Maistrenko. The Indentation Fracture Resistance of Self-Reinforced Mullites; T. Sakai, et al. Cleavage of Ceramic and Mineral Single Crystals; R.A. Schultz, R.C. Bradt. 32 additional articles. Index.