HIGH-TEMPERATURE OXIDATION PROTECTIVE COATINGS FOR VANADIUM-BASE ALLOYS. Bimonthly Report No. 2, November 13, 1962-January 12, 1963
Processing variables relating to the pack-siliconizing of V-5 wt% Ti-20 wt% Nb and V-1 wt% Ti-60 wt% Nb are being studied. Samples coated at 2010, 2190, and 2370 deg F show that coating growth rate is time dependent up to 16 hours. Silicide coatings have been applied to l1 vanadium alloys currently under development, and no failures have been observed after 15 to 35 hours in 2200 deg F air. Tensile and other specimens of V-1 wt% Ti-60 wt% Nb have been pack- siliconized for evaluation by aerospace and other organizations. Compounds of V- Nb-Ni were flame-sprayed on V-1 wt% Ti-60 wt% Nb, but excessive porosity caused rapid failure in 2000 and 2200 deg F air. Diffusion couples of nickel and the V- Nb-Ti alloy were reacted at 2000 and 2200 deg C for 24 and 8 hours, respectively, with very slight hardening of the vanadium alloy. (auth)
- Research Organization:
- Illinois Inst. of Tech., Chicago. Armour Research Foundation
- NSA Number:
- NSA-17-012610
- OSTI ID:
- 4704989
- Report Number(s):
- ARF-B6001-2
- Country of Publication:
- United States
- Language:
- English
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