1. O. Yeheskel, Y. Gefen andM. Talianker,J. Mater. Sci. 19 (1984) 745.
2. K. Hirota, T. Ichikizaki, Y. Hasegawa andH. Suzuki, in Proceedings of the First International Symposium on Ceramic Components for Engines, Japan, edited by S. Somiya, E. Kanai and K. Ando, Hakone, Japan, 17–19 October (1983) p. 434.
3. S. Somiya, M. Yoshimura, S. Fujiwara, A. Sawano andK. Kondo,ibid.in p. 442.
4. P. Greil, J. C. Bressiani andG. Petzow,ibid.in p. 228.
5. H. R. Zhuang, W. L. Li, D. Q. Hua, S. L. Wen, Y. Y. Sun, X. R. Fu andT. S. Yen,ibid.in p. 368.