Calculations of oxidation rates of zirconium
The rates of oxidation for zirconium metal in oxygen are calculated using perfusive-precipitation modeling with the boundary conditions that: there is no moving boundary and metal matrix saturation is reached for oxygen solubility. The perfusive-precipitation model is a diffusion model with a chemical reaction. It uses Fick's Second Law of Diffusion with an added sink term. The sink term is an overall second order reaction, first order with respect to each the dissolved oxygen and the metal. The stationary boundary condition is valid for the ductile zirconium as long as the expansion due to the reaction product formation does not cause metal failure or spalling. The metal matrix saturated condition implies an upper limit to the metastable solubility of oxygen in the zirconium metal and is approximated from the phase diagram. The calculated rates are compared to the rates listed in the literature. These calculated rates, using no variable parameters, are in good agreement with experimental data.
- Research Organization:
- Union Carbide Corp., Oak Ridge, TN
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5037302
- Journal Information:
- Ceram. Awareness Bull.; (United States), Vol. 37:12
- Country of Publication:
- United States
- Language:
- English
Similar Records
First-principles calculations of solute transport in zirconium: Vacancy-mediated diffusion with metastable states and interstitial diffusion
Radiation-induced solute segregation and precipitation in alloys. [3. 2 MeV /sup 58/Ni/sup +/ at 425/sup 0/C and 625/sup 0/C]
Related Subjects
ZIRCONIUM
OXIDATION
BOUNDARY CONDITIONS
CALCULATION METHODS
CHEMICAL REACTION KINETICS
COMPARATIVE EVALUATIONS
DIFFUSION
EXPERIMENTAL DATA
MATHEMATICAL MODELS
OXYGEN
CHEMICAL REACTIONS
DATA
ELEMENTS
INFORMATION
KINETICS
METALS
NONMETALS
NUMERICAL DATA
REACTION KINETICS
TRANSITION ELEMENTS
360105* - Metals & Alloys- Corrosion & Erosion