Interdiffusion in CoO-NiO Solid Solutions |
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| Authors: | J. J. STIGLICH JR. J. B. COHEN D. H. WHITMORE |
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| Affiliation: | Department of Materials Science and Materials Research Center, Northwestern University, Evanston, Illinois 60201 |
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| Abstract: | Interdiffusion coefficients were measured in CoO-NiO solid solutions over the range 1000° to 1600°C in air and at po2=5×10−8 atm. Isothermal values of the interdiffusion coefficients in this system increased exponentially with the CoO concentration. Comparison of the present results with cation-tracer diffusion coefficients for this system measured under similar conditions by Chen and Peterson shows that a Darken-type equation relating the interdiffusion coefficient to the cation-tracer diffusivities is valid for these data. |
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