THERMAL EXPANSION AND ATOMIC VIBRATION AMPLITUDES FOR TiC, TiN, ZrC, ZrN, AND PURE TUNGSTEN
Pure tungsten and nearly stoichiometric ZrC, ZrN, TiC, and TiN were investigated by x-ray diffraction. Thermal expansions and atomic vibration amplitudes were measured, in some cases to above 2000 deg C. Although a differert amplitude is possible for each atom type, a common isotropic amplitude is sufficient to fit the high temperature data, suggesting that equivalent forces act upon each atom within a given material. The vibration araplitude generally increased with thermal expansion, as expected. Compounds containing nitrogen and titanium exhibit larger amplitudes than those containing zirconium and carbon. Among the substances studied, tungsten has the smallest amplitudes and thermal expansions. Debye temperatures derived frora the x-ray amplitudes decrease slightly with increasing specimen temperature. (auth)
- Research Organization:
- Union Carbide Research Inst., Tarrytown, N.Y.
- NSA Number:
- NSA-18-019987
- OSTI ID:
- 4014504
- Journal Information:
- Phys. Chem. Solids, Vol. Vol: 25; Other Information: Orig. Receipt Date: 31-DEC-64
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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