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1.
The influence of additives such as TiO2, Al2O3 and their mechanical mixture as well as aluminium oxide, the surface of which contains phosphorous and titanium-oxide nanostructures, on the combustibility of foam plast (trade mark PEN-I), produced on the basis of epoxide novolak block-copolymers, was studied. It was stated that the incorporation both phosphorous-containing and titanium-containing oxides in the composition results in significant (in two to five times) decreasing of the samples’ combustibility. The probable mechanism of inhibition of burning process for those combustion retarders was discussed. 相似文献
2.
Unstable form changing (click) of an arched TiNi strip annealed at 773 K is investigated. After the annealing, the strip is
placed into the grips of a deforming machine and is transferred to the martensitic state by bending in the direction opposite
to its initial bend. Subsequent heating of the strip, which carries it to the austenitic state, is accompanied by a click
under the conditions of constrained form changing. Analysis of the martensitic deformation in terms of the theory of diffuse
martensitic transformations makes it possible to establish the conditions under which the form changing process becomes unstable. 相似文献
3.
G. A. Malygin 《Physics of the Solid State》1998,40(4):629-633
This paper discusses theoretically the mechanism that causes the temperature dependences of the yield point and yield stress,
along with their rate coefficients, to deviate from behavior characteristic of thermally activated plastic strain at low temperatures
(<30 K). At this time the existence of such deviations, e.g., anomalous decreases in the values of these characteristics in
this temperature range, is explained by arguing that the process whereby dislocations overcome local barriers has inertia.
It is shown that the observed anomalies can be caused by the development of thermal instability in the plastic strain at low
temperatures. In contrast to inertia-related effects, thermal effects allow us to explain the plasticity of crystals at low
temperatures without contradiction and within the framework of a single mechanism, including the unstable, discontinuous character
of plastic strain that is characteristic of these temperatures.
Fiz. Tverd. Tela (St. Petersburg) 40, 684–689 (April 1998) 相似文献
4.
A. V. Klinov G. S. D’yakonov A. V. Malygin 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2007,81(12):1945-1949
Integral equation theory for partial distribution functions was used to suggest an effective method for calculating the derivative of radial distribution function with respect to temperature under isobaric conditions. The thermodynamic expansion, compression, and pressure coefficients and isobaric and isochoric heat capacities were calculated for Lennard-Jones fluids. The calculation results were in close agreement with the known thermodynamic relations. 相似文献
5.
S. A. Trifonov E. A. Sosnov Yu. S. Belova A. A. Malygin N. G. Razinkova G. G. Savkin 《Russian Journal of Applied Chemistry》2007,80(8):1413-1418
The influence of a gas-phase chemical modification of low-density polyethylene with volatile halides of various elements [PCl3, TiCl4, VOCl3, BBr3, and Si(CH3)2Cl2] on the surface layer morphology and vapor permeability of polymeric formulations was examined by atomic-force microscopy, chemical analysis, and adsorption method. 相似文献
6.
Novozhilova E. A. Malygin A. A. Rychkov A. A. Kuznetsov A. E. 《Russian Journal of Applied Chemistry》2021,94(6):777-786
Russian Journal of Applied Chemistry - Organo-inorganic composite materials based on films of polytetrafluoroethylene and tetrafluoroethylene–hexafluoropropylene copolymer, modified with... 相似文献
7.
A. A. Malkov A. A. Malygin 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2014,88(3):530-536
Based on data from chemical analytical studies, IR, and Raman spectroscopy the relations between the conditions of synthesis, the structure of vanadium oxychloride groups formed on the surface in the interaction of VOCl3 with OH groups of silica, and subsequent transformations in the composition of these groups during vapor-phase hydrolysis and heat treatment has been found. 相似文献
8.
The “high strength-low plasticity resource” dilemma associated with the macrolocalization of plastic deformation in the form
of a neck in a stretched specimen, which leads to ductile failure of the specimen, has been theoretically discussed in the
framework of the dislocation-kinetic approach. It has been quantitatively demonstrated using micro- and nanocrystalline metals
as an example that their low plasticity resource (a small value of uniform strain before the beginning of the neck formation)
and quasi-embrittlement result from the strong increase in the yield strength with a decrease in the grain size and the strain-hardening
coefficient due to the annihilation of dislocations in the boundaries and bulk of grains. 相似文献
9.
G. A. Malygin 《Physics of the Solid State》2005,47(4):656-662
Copper is used as an example to analyze the effect of radiation on the stress-strain curves and deformation stability of radiation-hardened metals. The analysis is based on an equation that describes the evolution of the dislocation density with deformation in a plastically deformed material. Deformation instability in the initial stage of the stress-strain curve is caused by strong deformation localization at the microscopic level as a result of the transformation of immobile radiation defects (vacancy and interstitial loops) into mobile dislocations. The channeling of a large number of dislocations along slip planes causes the appearance of a yield drop and a yield plateau in the stress-strain curves. The critical conditions for their appearance, as well as the theoretical irradiation-dose dependences of the yield-plateau length and the uniform strain to necking, are found. 相似文献
10.
Kochetkova A. S. Sosnov E. A. Malkov A. A. Antipov V. V. Kulikov N. A. Malygin A. A. 《Russian Journal of Applied Chemistry》2019,92(7):883-892
Russian Journal of Applied Chemistry - Effect of a simultaneous thermal treatment at 480°C and X-ray radiation (irradiation dose 10?3 C/kg (~4 R) in a vacuum (residual pressure... 相似文献