Local Atomic Arrangements in a Magnesiowustite Solid Solution
Identifieur interne : 000D89 ( Main/Merge ); précédent : 000D88; suivant : 000D90Local Atomic Arrangements in a Magnesiowustite Solid Solution
Auteurs : A. Krawitz [États-Unis] ; J. B. Cohen [États-Unis]Source :
- Journal of the American Ceramic Society [ 0002-7820 ] ; 1975-05.
English descriptors
- Teeft :
- Acra crystallogr, Actual measurements, Alloy, Anion, Anion sublattice, Atomic displacements, Average size, Average sizes, Boundary conditions, Bragg peaks, Cation, Cation sublattice, Cluster sizes, Coefficient, Cohen, Computer maps, Conditional probability, Densification, Diffuse, Diffuse intensity, Diffusion coefficient, Direct beam, Fourier, Fourier coefficients, Further details, Grain boundaries, Grain edges, Grain growth, Interatomic vector, Interatomic vectors, Intermediate stage, Ion, Local order, Magnesiowustite, Magnesium oxide, Magnetic clusters, Magnetic data, Magnetic interaction, Magnetic measurements, Magnetization, Materials science, Mathematical model, Minimum volume, Multisublattice systems, Nearest neighbors, Northwestem university, Northwestern university, Ofthe, Order parameters, Oxide, Phys, Pore, Positive deviations, Present paper, Present study, Reciprocal space, Same time, Single crystal, Single crystals, Sintering, Sintering equation, Slow cooling, Solid solution, Solid solutions, Soller slits, Spinel, Static displacements, Steel research laboratories, Sublattice, Ternary oxide, Ternary system, Third neighbors, Vacancy flow, Volume fraction.
Abstract
Quantitative studies of diffuse X‐ray scattering and measurements of magnetization are reported for (Fe,Mg)O with 15.7 cation % Fe held in a reducing atmosphere at 1400°C and quenched. The diffuse scattering is greater for fast cooling than for slow cooling; in both cases, spinel precipitation occurs, but the amount is much larger in the latter case. From this scattering, short‐range order parameters were determined for the clustering between cations, and displacements were obtained between cations and anions. From the magnetic measurements the size of magnetic Fe ion clusters was obtained. Computer simulations of the cation arrangement with the measured short‐range order parameters indicate that the magnetic clusters cannot be accounted for by nearest‐neighbor Fe2+] clusters. However, clusters of Fe ions related by first‐ and/or second‐neighbor vectors are of the size found from the magnetic data.
Url:
DOI: 10.1111/j.1151-2916.1975.tb11436.x
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<profileDesc><textClass><keywords scheme="Teeft" xml:lang="en"><term>Acra crystallogr</term>
<term>Actual measurements</term>
<term>Alloy</term>
<term>Anion</term>
<term>Anion sublattice</term>
<term>Atomic displacements</term>
<term>Average size</term>
<term>Average sizes</term>
<term>Boundary conditions</term>
<term>Bragg peaks</term>
<term>Cation</term>
<term>Cation sublattice</term>
<term>Cluster sizes</term>
<term>Coefficient</term>
<term>Cohen</term>
<term>Computer maps</term>
<term>Conditional probability</term>
<term>Densification</term>
<term>Diffuse</term>
<term>Diffuse intensity</term>
<term>Diffusion coefficient</term>
<term>Direct beam</term>
<term>Fourier</term>
<term>Fourier coefficients</term>
<term>Further details</term>
<term>Grain boundaries</term>
<term>Grain edges</term>
<term>Grain growth</term>
<term>Interatomic vector</term>
<term>Interatomic vectors</term>
<term>Intermediate stage</term>
<term>Ion</term>
<term>Local order</term>
<term>Magnesiowustite</term>
<term>Magnesium oxide</term>
<term>Magnetic clusters</term>
<term>Magnetic data</term>
<term>Magnetic interaction</term>
<term>Magnetic measurements</term>
<term>Magnetization</term>
<term>Materials science</term>
<term>Mathematical model</term>
<term>Minimum volume</term>
<term>Multisublattice systems</term>
<term>Nearest neighbors</term>
<term>Northwestem university</term>
<term>Northwestern university</term>
<term>Ofthe</term>
<term>Order parameters</term>
<term>Oxide</term>
<term>Phys</term>
<term>Pore</term>
<term>Positive deviations</term>
<term>Present paper</term>
<term>Present study</term>
<term>Reciprocal space</term>
<term>Same time</term>
<term>Single crystal</term>
<term>Single crystals</term>
<term>Sintering</term>
<term>Sintering equation</term>
<term>Slow cooling</term>
<term>Solid solution</term>
<term>Solid solutions</term>
<term>Soller slits</term>
<term>Spinel</term>
<term>Static displacements</term>
<term>Steel research laboratories</term>
<term>Sublattice</term>
<term>Ternary oxide</term>
<term>Ternary system</term>
<term>Third neighbors</term>
<term>Vacancy flow</term>
<term>Volume fraction</term>
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<front><div type="abstract" xml:lang="en">Quantitative studies of diffuse X‐ray scattering and measurements of magnetization are reported for (Fe,Mg)O with 15.7 cation % Fe held in a reducing atmosphere at 1400°C and quenched. The diffuse scattering is greater for fast cooling than for slow cooling; in both cases, spinel precipitation occurs, but the amount is much larger in the latter case. From this scattering, short‐range order parameters were determined for the clustering between cations, and displacements were obtained between cations and anions. From the magnetic measurements the size of magnetic Fe ion clusters was obtained. Computer simulations of the cation arrangement with the measured short‐range order parameters indicate that the magnetic clusters cannot be accounted for by nearest‐neighbor Fe2+] clusters. However, clusters of Fe ions related by first‐ and/or second‐neighbor vectors are of the size found from the magnetic data.</div>
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