Accession Number:

ADA065362

Title:

Thermodynamic and Kinetic Properties of Solute Atoms in Interstitial Solid Solutions.

Descriptive Note:

Final rept. 15 Nov 75-15 Nov 78,

Corporate Author:

RICE UNIV HOUSTON TEX DEPT OF MECHANICAL ENGINEERING

Personal Author(s):

Report Date:

1979-01-01

Pagination or Media Count:

15.0

Abstract:

Measurements of the elastic properties of the Group V metals from room temperature up to 2000 K have shown that the lattice softening effect is not responsible for non-Arrhenius behavior seen in the diffusion of interstitial atoms through these metals. Work on the Fe-C and Pd-H systems has shown that the volume changes associated with the insertion of a solute atom has a second-order effect on the mobility of the interstitial solute, but has a significant effect on the thermodynamic properties. The temperature variation of the H-solubility in a series of Mo-Nb solvents has been measured. The resulting enthalpies of solution show a variation with the electronic density of states at the Fermi surface which is not in accord with the screened proton model for H-metal systems. The diffusivity of hydrogen in several noble metals has been measured using the permeability time-lag technique. Author

Subject Categories:

  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE