Mechanism of the fcc-bcc martensitic transformation with the fastest transformation of close-packed planes. I. The lattice parameter ratio and habitus planes

In terms of the concepts of heterogeneous nucleation and the related driving wave process, a version of the dynamic theory of the formation of martensite crystals is stated in which the wave process initiates the fastest transformation of close-packed {ie659-01} atomic planes of a parent fcc phase into {ie659-02} planes of a bcc phase. The lattice parameter ratio and the orientations of habit planes are analytically related with the elastic properties of the γ-phase. Quantitative estimation performed with the use of elastic moduli for an iron-nickel alloy yields habitus orientations close to {ie659-03}. An experiment is proposed to verify the theoretical predictions. A new pattern of the short-wave correction that finishes the fcc-bcc rearrangement is set forth. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 7, pp. 3–7, July, 2008.     

Pairs of inversely occupied electronic states in the energy range best suited to wave generation

For a model electronic spectrum of a bcc crystal, characteristic s-surfaces are found that separate, in the quasi-momentum space, pairs of electronic states potentially active in the generation of elastic waves at the stage of growth of a martensite crystal. Numerical estimation of the fraction of active electronic states (R_eff/R) is performed for the energy range Δ = 0.2 eV near the Fermi level. The ratio R_eff/R is calculated as a function of the parameter ratio for the interaction between the nearest and the second neighbors for both bcc and fcc lattices. __________ Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 44–48, November, 2005.     

Chemistry of Iminofuran: XVI. Synthesis,Structure, Biological Activity,and Cyclization of 4-Oxo-2-(2-phenylaminobenzoylhydrazono)butanoic Acids

The reaction of (2-phenylaminobenzoyl)hydrazine with 4-aryl-2-hydroxy-4-oxobut-2-enoic and 2-hydroxy-5,5-dimethyl-4-oxohex-2-enoic acids results in the formation of 4-aryl-2-(2-phenylaminobenzoyl-hydrazono)-4-oxobutanoic and 5,5-dimethyl-2-(2-phenylaminobenzoylhydrazono)-4-oxohexanoic acids. The products in solutions are present as mixtures of a Z,E-hydrazono form and a cyclic pyrazolinic form, and under the action of acetic anhydride they cyclize in 5-aryl- and 5-tert-butyl-3-(2-phenylaminobenzoylhydrazono)-furan-2,3-diones. 4-Aryl-2-(2-phenylaminobenzoylhydrazono)-4-oxobutanoic and 5,5-dimethyl-2-(2-phenyl-aminobenzoylhydrazono)-4-oxohexanoic acids were tested for antinociceptive and anti-inflammatory activity.

     

Synthesis and Bioactivity of 5-Aryl-4-acyl-3-hydroxy-1-[2-(imidazolyl-3-yl)ethyl]3-pyrroline-2-ones

Russian Journal of General Chemistry - 5-Aryl-4-acyl-3-hydroxy-1-[2-(imidazolyl-3-yl)ethyl]-3-pyrroline-2-ones were synthesized by three-component reaction of methyl dioxobutanoates with aromatic...