1. M. McLean,Directionally Solidified Materials For High Temperature Service, p. 5, The Metals Society, London, England (1983).
2. J. Chen, Q. Zheng, Y. J. Tang and Z. Q. Hu,Materials Letters 22, 549 (1995).
3. J. Chen, Q. Zheng, Y. A. Li, Y. Yu, Y. J. Tang and Z. Q. Hu,Scripta Metall. 33, 675 (1995).
4. V. G. Smith, W. A. Tiller and J. W. Rutter,Can. J. Phys. 33, 723 (1955).
5. F. R. Mollard and M. C. Flemings,Trans. AIME 239, 1534 (1967).