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Thermal Stability and Mechanical Behavior of Ultra-Fine Bcc Ta and v Coatings

Description: Ultra-refined microstructures of both tantalum (Ta) and vanadium (V) are produced using electron-beam evaporation and magnetron sputtering deposition. The thermal stability of the micron-to-submicron grain size foils is examined to quantify the kinetics and activation energy of diffusion, as well as identify the temperature transition in dominant mechanism from grain boundary to lattice diffusion. The activation energies for boundary diffusion in Ta and V determined from grain growth are 0.3 an… more
Date: November 3, 2006
Creator: Jankowski, Alan Frederic; Go, J. & Hayes, J. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Energy Randomisation. How Much of Rotational Phase Space Is Explored? How Long Does It Take?

Description: In applying modern theories (RRKM) of unimolecular reaction, it is necessary to decide the volume of phase space in which the energy is assumed to be randomized. The question of whether the K rotational quantum number is conserved impacts on that choice. The conceptual sequence from experimental spectra, through analysis, and interpretation in terms of K relaxation is described for ethanol and 1-butyne in the 3 micron region. The interpretation of molecular eigenstate spectra involves identific… more
Date: December 1995
Creator: Perry, D. S.; Bethardy, G. A.; Davis, M. J. & Go, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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