Results 231 to 240 of about 1,727,422 (269)
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2014
In the introduction to the topic of reaction kinetics, two important classes of reactions were identified, homogeneous and heterogeneous reactions. Heterogeneous reactions include reactions that result in solute transfer across stable planar interfaces, solute transfer across unstable nonplanar interfaces and phase formation reactions.
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In the introduction to the topic of reaction kinetics, two important classes of reactions were identified, homogeneous and heterogeneous reactions. Heterogeneous reactions include reactions that result in solute transfer across stable planar interfaces, solute transfer across unstable nonplanar interfaces and phase formation reactions.
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Theory of phase formation in aqueous two-phase systems
Journal of Chromatography B: Biomedical Sciences and Applications, 1996Currently there are a number of different mathematical models for phase equilibria in aqueous two-phase systems available. This diversity can create some confusion for model users, since most models seem to perform reasonably well. Choosing a model, thus, becomes rather a difficult task.
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2016
This chapter gives an overview of existing active phase formation rules for high-entropy alloys (HEAs). A parametric approach using physiochemical parameters including enthalpy of mixing, entropy of mixing, melting points, atomic size difference, and valence electron concentration is used to delineate phase formation rules for HEAs, with a reference to
Yong Zhang +3 more
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This chapter gives an overview of existing active phase formation rules for high-entropy alloys (HEAs). A parametric approach using physiochemical parameters including enthalpy of mixing, entropy of mixing, melting points, atomic size difference, and valence electron concentration is used to delineate phase formation rules for HEAs, with a reference to
Yong Zhang +3 more
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Adaptive phase formation in martensitic transformation
Physical Review B, 1991It is shown that an appearance of an intermediate martensite phase called adaptive martensite may be expected if the surface energy of a boundary between two orientational variants of the normal martensite phase is very low and the typical lattice-mismatch-related elastic energy is high.
, Khachaturyan +2 more
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Formation of Tetrahedral Phases
1969The properties of semiconducting compounds are governed primarily by the short-range order, i. e., by the chemical nature of atoms, the geometry of their distribution, and the absolute distances between them. The crystal structure of semiconducting compounds is a very important characteristic of the short-range order and, in the majority of such ...
Lev I. Berger, Vitalii D. Prochukhan
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2009
Locally similar icosahedral structural ordering between parent phase and nucleating phase is believed to be responsible for the frequently occurring formation of icosahedral quasicrystals from undercooled liquid alloys or during devitrification of metallic glasses.
Walter Steurer, Sofia Deloudi
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Locally similar icosahedral structural ordering between parent phase and nucleating phase is believed to be responsible for the frequently occurring formation of icosahedral quasicrystals from undercooled liquid alloys or during devitrification of metallic glasses.
Walter Steurer, Sofia Deloudi
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Phase formations in Co–Silicon system
Microelectronic Engineering, 2004Interactions between thin cobalt, 40 nm, and a thick - 250 nm - silicon film were investigated by in situ sheet resistance measurements. Poly and amorphous silicon films, both deposited by CVD, were used. MeV 4He+ Rutherford Backscattering and X-ray diffraction techniques were used to infer the kinds and thicknesses of the compounds formed.
CORNI, Federico +5 more
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Dynamical mechanism for the formation of metastable phases
Physical Review Letters, 1991Rapid temperature quenches have long been known to produce metastable thermodynamic phases. We study Landau-Ginzburg models of phase transitions for free energies having three local minima and show that metastable phases can be formed via a dynamic instability that splits the front separating the stable high- and low-temperature phases.
, Bechhoefer, , Löwen, , Tuckerman
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Tracing the Phase Formation and Stability of the Clathrate Phase BaGe5
MaterialiaThermal stability and phase formation of the clathrate phase BaGe5 and its formation from the clathrate-I phase Ba8Ge43□3 (□ = vacancy in the crystal structure) have been investigated by microstructure analysis, differential scanning calorimetry (DSC), and powder X-ray diffraction (PXRD).
Umut Aydemir +3 more
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Phase transformation and chiasma formation in locusts
Chromosoma, 1967The chiasmata in the eight longest of the eleven autosomes in spermatocytes of three species of locusts are greatly increased from the low basic number characteristic of the grasshopper-like or solitaria phase to higher numbers in the swarming or gregaria phase.
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