THE SELF-DIFFUSION OF NIOBIUM--II. Second Annual Progress Report, July 1, 1957 to June 30, 1958
The self-diffusion coefficient of niobium was measured as a function of temperature. Procedures were developed for the preparation of NbCl/sub 5/ from a solution of radioactive Nb/sup 95/ in oxalic acid, and the subsequent vapor plating of a radioactive metallic layer from this volatile compound. Initial measurements made at 2000 and 1800 deg C yield values for the self-diffusion coefficient of 3.2 x 10/sup -9/ cm/sup 2/sec and 1.7 x 10/sup 10/ cm/sup 2/sec, respectively. (auth)
- Research Organization:
- Sylvania Electric Products Inc. Metallurgical Research Lab., Bayside, N.YU.
- NSA Number:
- NSA-12-016394
- OSTI ID:
- 4299335
- Report Number(s):
- SEP-248
- Country of Publication:
- United States
- Language:
- English
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