1. E. Fitzer, Plansee Proc., 2nd Seminar, Reutte Tyrol (Pergamon Press, 1956), p. 56.
2. J. H. Westbrook and D. L. Wood,J. Nucl. Mater. 12, 208 (1964).
3. D. A. Berztiss, R. R. Cerchiara, E. A. Gulbransen, F. S. Pettit, and G. H. Meier,Mater. Sci. Eng. A155, 165 (1992).
4. R. W. Bartlett, J. W. McCamont, and P. R. Gage,J. Am. Ceram. Soc. 48, 551 (1965).
5. R. W. Bartlett and P. R. Gage,Investigation of Mechanisms for Oxidation Protection and Failure of Intermetallic Coatings for Refractory Metals, Philco Corp. Research Lab., Tech. Doc. Rept. No. ASD-TDR-63-753, Part II, A. F. Contract No. AF 33 (657)-9170, 1964.