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Article
Foreword
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Article
Intermediate Phases in LixFePO4
Rietveld analysis for the time of flight powder neutron diffraction profile for LiFePO4 at room temperature was performed. Refined tensor elements of the unisotropic thermal factor under the elliptic approximatio...
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Article
Materials science applications of inelastic neutron scattering
Inelastic neutron scattering measures the dynamical processes in materials, as opposed to spatial arrangements of atoms. A neutron diffraction pattern is obtained from measurements of the momentum transfer bet...
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Article
Metallic Hydrides I: Hydrogen Storage and Other Gas- Phase Applications
A brief survey is given of the various classes of metal alloys and compounds that are suitable for hydrogen-storage and energy-conversion applications. Comparisons are made of relevant properties including hyd...
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Chapter
Vibrational Entropy and Local Structures of Solids
There is now widespread evidence that vibrational entropy must be included in an understanding of solid state phase transitions. While the basic principles are known, the individual phenomena that contribute t...
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Chapter
Kinetics of Disorder →Order Transformations: Thermodynamic Theory Versus Kinetic Rate Theory
In alloys near thermodynamic equilibrium, the state variables change slowly enough so that the alloy is able to sample all microstates available to it. The entropy is well-defined. It is not surprising, althou...
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Chapter
Chemical Systematics of Iron-57 Hyperfine Magnetic Field Distributions in Iron Alloys
There have been several excellent reviews of applications of iron-57 Mössbauer spectrometry in physical metallurgy and metals physics.1–9 These reviews typically demonstrate applications of the four measurable qu...
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Article
A microstructural study of mechanical alloying of Fe and Sn powders
Elemental Fe and Sn powders in the ratio of 1:2 were ball-milled for various times at room temperature, and phase transformations in the powders were studied by 57Fe and 119Sn Mössbauer spectrometries, transmissi...
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Chapter
Kinetic States of Order in Highly Nonequilibrium Materials
Two concepts from the kinetic theory of disorder→order transformations are presented. Kinetics provides control over the path taken en route to equilibrium, permitting different types of microstructures to be syn...
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Article
Kinetics of Ordering in Fe3Al: Experiment
Alloys near the Fe3Al stoichiometry were prepared far from thermodynamic equilibrium by rapid solidification methods. These highly disordered materials were then annealed at low temperatures to develop B2 and D03
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Article
The Pseudostable Phase
The basic nature of kinetic processes is examined theoretically. When an isothermal development of order is studied theoretically, sometimes an ordered phase different from the final equilibrium one transientl...
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Article
Short range ordering in undercooled Fe3Al
Alloys of Fe-27 at.% Al were prepared far from thermodynamic equilibrium by ultra-rapid quenching from the melt. The hyperfine magnetic field (hmf) distribution revealed a wide variety of local Al environments...
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Article
Hyperfine magnetic fields in Fe−Co alloys and their tempera ture dependences
We obtained57Fe hyperfine field parameters from Fe1−x-Co x alloys (0≤x≤0.6) from 77 K to 900 K. We first discuss the origin of the low temperature hyperfine fields in terms of t...
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Article
Kinetics of ordering in metallic alloys
Electrical, magnetic, and mechanical properties of metallic alloys depend on their state of chemical order. The systematic perturbations of57Fe hyper-fine magnetic fields by solute atoms near57Fe atoms can be use...
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Article
Icosahedral phase formation in rapidly quenched aluminum-ruthenium alloys
Systematic rapid quenching experiments on the icosahedral phase-forming system Al1 − xRux were performed for × < 20 at. %. The solidified alloys have been studied by electron microscopy and x-ray diffraction to d...
