Accession Number:

AD0609348

Title:

THERMODYNAMICS OF INTERSTITIAL SOLID SOLUTIONS AND REFRACTORY COMPOUNDS. VAPORIZATION KINETICS OF NON-STOICHIOMETRIC COMPOUNDS.

Descriptive Note:

Semi-annual progress rept. no. 2, 1 Sep 63-1 Mar 64,

Corporate Author:

MANLABS INC CAMBRIDGE MASS

Personal Author(s):

Report Date:

1964-03-15

Pagination or Media Count:

45.0

Abstract:

The purpose of the investigation is to calculate the vaporization kinetics of non-stoichiometric phases for both congruent and non-congruent vaporization based on the following assumptions 1 The mass transport of vaporizing species is not diffusion limited. 2 The solid and vapor phases are in quasi-static equilibrium. 3 The effective surface area remains constant. 4 No molecular vaporization occurs. 5 The vaporization rates of the individual constituents are given by the Langmuir rate equation. 6 The thermodynamic properties of the nonstoichiometric solid and vapor phases are described by the Schotty-Wagner lattice defect model developed by Kaufman, et al for refractory, interstitial compounds.

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE