Crouch, AG and Robertson, J (1990) Creep and oxygen diffusion in magnetite. Acta metallurgica et materialia, 38. pp. 2567-2572. ISSN 0956-7151Full text not available from this repository.
The creep rate of polycrystalline Fe3O4 has been measured as a function of stress and oxygen partial pressure in the temperature range 480-1100°C. A regime of power law creep is found at high stress, with a stress exponent of ≈3.1 and an activation energy of 264 kJ/mol. A regime of diffusional flow is found at lower stresses and is interpreted as Nabarro-Herring creep. The data for the two regimes are combined to deduce an oxygen diffusion coefficient of ≈ 10-5 exp(-264 kJ/mol/RT)m2s-1, with oxygen vacancies suggested as the mobile species.
|Depositing User:||Cron job|
|Date Deposited:||04 Feb 2015 22:40|
|Last Modified:||05 Mar 2015 01:15|