Isotope effect for cation diffusion in CoO

Chen, W.K.; Peterson, N.L.

doi:10.1016/0022-3697(80)90017-7

Cited by 34 publications

(5 citation statements)

References 19 publications

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“…1a, the D~o-values decrease almost exponentially with increasing XMgO' The cation diffusion in (Co,Mg)O operates through a vacancy mechanism. This is concluded from the oxygen potential and composition dependence of both ot: and x., and from the isotope effect [8,9). Since the jump frequencies of Co and Mg on the cation sublattice are different, subsequent elementary diffusion jumps are correlated.…”

Section: Point Defects In Oxide Solid Solutions (Iv) Correlated Diffmentioning

confidence: 99%

Point Defects in Oxide Solid Solutions (IV). Correlated Diffusion of Cations and Vacancies in (Co, Mg)O‐Mixed Crystals

Schnehage

Dieckmann

Schmalzried

1982

Ber Bunsenges Phys Chem

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Magnesium tracer diffusion coefficients have been determined experimentally for the oxide solid solution (CoxMg1 ‐ x)1 ‐ δO as a function of temperature and composition x. 2612Mg was used as the stable tracer isotope and analysed by mass spectrometry. Combination of these data with previously obtained data on Co‐tracer diffusion allowed to explain quantitatively the pronounced correlation effects during cation diffusion and to calculate the individual jump frequencies of the cations. Finally, chemical diffusion coefficients of the vacancies are derived and compared with data from relaxation experiments.

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Section: Point Defects In Oxide Solid Solutions (Iv) Correlated Diffmentioning

confidence: 99%

Point Defects in Oxide Solid Solutions (IV). Correlated Diffusion of Cations and Vacancies in (Co, Mg)O‐Mixed Crystals

Schnehage

Dieckmann

Schmalzried

1982

Ber Bunsenges Phys Chem

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“…13,[19][20][21][22][23][26][27][28][29] Figure 8 shows the effective diffusion coefficients obtained in this study as a function of oxygen partial pressure with several typical reported values. 21,23,26,29) The self diffusion coefficient of cobalt reported by Mrowec and Przybylski 23) with the sample obtained from high temperature oxidation experiments of cobalt at 1373 K is in good agreement to that obtained in this study.…”

Section: The Effective Diffusion Coefficients Of Cobalt and Oxygen Inmentioning

confidence: 99%

Quantitative Prediction of Voids Formation in a Growing Cobaltous Oxide Scale at 1373 K

et al. 2007

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Quantitative prediction of voids formation is demonstrated for CoO scale formed at 1373 K. Calculations of ion fluxes and their divergence in CoO scales can predict the void formation in the scale which mostly occurs in the vicinity of the metal/oxide interface. The volume fraction of voids is found to be maximum at the initial surface. These predictions are in good agreement with the observed morphology of CoO scale obtained in high temperature oxidation of cobalt at 1373 K.

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“…In addition, it is known that the diflhsion of the anion is considerably slower than the diffusion of the cation [e.g. 6,7]. The high-temperature steady-state creep (constant load) of COl.xO single crystals has been investigated over a wide range of temperatures and Po, [8].…”

Section: Colxomentioning

confidence: 99%

High-Temperature Deformation and Diffusion in Oxides

Routbort

1993

DDF

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This report was prepared as an account of work sponsored by an agency of the United States ,.-(Government. Neither the United States Goverr_mcnt nor any agency thereof, nor any of their .... employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or ttsefuln, ess of any information, apparatus, product, or process disclosed, or represents that its u_e would not infringe privately owned rights. Refercnce, herein to any specific commercial product, prcf.ess, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United State_ Government or any age.hey thereof, The vi,cws and opinio,ns of a_=thors expressed heroin do not necessarily state or reflect those of the Unit_ Ststes Government or any age;heythereof.

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Isotope effect for cation diffusion in CoO

Cited by 34 publications

References 19 publications

Point Defects in Oxide Solid Solutions (IV). Correlated Diffusion of Cations and Vacancies in (Co, Mg)O‐Mixed Crystals

Point Defects in Oxide Solid Solutions (IV). Correlated Diffusion of Cations and Vacancies in (Co, Mg)O‐Mixed Crystals

Quantitative Prediction of Voids Formation in a Growing Cobaltous Oxide Scale at 1373 K

High-Temperature Deformation and Diffusion in Oxides

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