RESEARCH ON PHYSICAL AND CHEMICAL PRINCIPLES AFFECTING HIGH TEMPERATURE MATERIALS FOR ROCKET NOZZLES. Semiannual Progress Report, July 1, 1961 to December 31, 1961
A semiquantitative study is made of the erosion or refractory materials by hot gases such as are encountered in rocket nozzles. The materials studied include TiB/sub 2/, ZrB/sub 2/, NbB/sub 2/, TaB/sub 2/, TiC, ZrC, NbC, TaC, W, and graphite, and the gases include CO, CO/sub 2/, H/sub 2/, HCl, BF/sub 3/, and CO--H/sub 2sub 2/O, C O-CO/sub 2/, and H/sub 2/--H/sub 2/O mixtures. The reactions of H/sub 2/ with grap hite and TiC at l800 to 2500 deg C are studied. The vaporization of ZrB/sub 2/ is studied near 2400 deg K. The spectra of molecular species of C (e.g., C and C/) in matrices of Ar, Xe, and Ne are measured. The dynnmic elastic constants of singlecrystal W, ZrC, and TiC, and of polycrystalline TiC and graphite, are determined at 27 to 1800 deg C. X-ray measurements are made of the thermal expansion and atomic vibration amplitudes of TiC at 25 to l700 deg C. The electric conductivity and Hall coefficient are found for singlecrystal TiC and for polycrystalline ZrC and TiC, at 77 to 350 deg K. The creep, optical density, and activation energy of MgO are measured, as a function of the heat treatment, at 1700 to 2000 deg K. The thermal conductivity of graphitized foam is measured at 1000 to 2400 deg K. (T.F.H.)
- Research Organization:
- Union Carbide Corp. Research Inst., Tarrytown, N.Y.; and Union Carbide Corp. Parma Research Center, Ohio
- NSA Number:
- NSA-16-016726
- OSTI ID:
- 4790642
- Report Number(s):
- NP-11311
- Country of Publication:
- United States
- Language:
- English
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