1. G. C. Wei andP. F. Becker,Amer. Ceram. Soc. Bull. 64 (1985) 298.
2. J. Homeny, W. L. Vaughn andM. K. Ferber,ibid. 67 (1987) 333.
3. C. D. Lin, C. T. Fu andA. K. Li, in ?Proceedings of the 1991 Annual Conference of the Chinese Society for Material Science? (The Chinese Society for Materials Science, Hsinchu, Taiwan, 1991) p. 640.
4. T. Tani andS. Wada,J. Mater. Sci. 25 (1990) 157.
5. A. K. Li, in ?Proceedings of KIMM-MRL Symposium on Advanced Materials and Processing? (Korea Institute of Machinery and Metals, Changwon, Kyungnam, Korea, 1990) p. 131.