Diffusion reaction between Zircaloy-2 and thoria

Diffusion reaction between Zircaloy-2 and thoria (ThO 2) has been studied by employing miniature diffusion couples under uniaxial loading conditions. Electron probe microanalyser (EPMA) has been used to establish the concentration profiles. Microstructural characterisations by scanning electron micr...

Full description

Saved in:
Bibliographic Details
Published in:Journal of nuclear materials 2004-02, Vol.325 (2), p.180-187
Main Authors: Sengupta, P, Gawde, P.S, Bhanumurthy, K, Kale, G.B
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fission nuclear power plants
Installations for energy generation and conversion: thermal and electrical energy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Diffusion reaction between Zircaloy-2 and thoria (ThO 2) has been studied by employing miniature diffusion couples under uniaxial loading conditions. Electron probe microanalyser (EPMA) has been used to establish the concentration profiles. Microstructural characterisations by scanning electron microscope (SEM) and concentration profiles by EPMA indicate the absence of any intermediate phase in the diffusion zone. The experiments show the preferential grain boundary diffusion of Th and O in Zircaloy-2 matrix. The interdiffusion coefficients are strongly dependent on the temperature of annealing and are of the order of 10 −18 m 2/s. The activation energy values for the layer growth kinetics and those estimated for interdiffusion coefficients are comparable.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2003.12.004