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Yu. M. Maksimov - One of the best experts on this subject based on the ideXlab platform.
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X-ray radiation in Self-Propagating High-Temperature Synthesis processes
Combustion Explosion and Shock Waves, 2008Co-Authors: A. I. Kirdyashkin, V. G. Salamatov, Yu. M. Maksimov, É. A. Sosnin, V. F. Tarasenko, R. M. GabbasovAbstract:Emission effects of heterogeneous combustion in the region of ionization radiation are studied. By an example of a Ti-B powder system, it is demonstrated that the processes of Self-Propagating High-Temperature Synthesis in the thermal explosion regime is accompanied by “soft” X-ray radiation with the quantum energy estimated as ≈5 keV. Key words: heterogeneous combustion, X-ray radiation.
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Self-Propagating High-Temperature Synthesis of composite material TiB2-Fe
Journal of Materials Science, 2004Co-Authors: O. K. Lepakova, L. G. Raskolenko, Yu. M. MaksimovAbstract:Results of an investigation of the microstructure and phase composition of materials of the Ti-B-Fe system, obtained by Self-Propagating High-Temperature Synthesis (SHS) are presented.
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Titanium borides prepared by Self-Propagating High-Temperature Synthesis
Inorganic Materials, 2000Co-Authors: O. K. Lepakova, L. G. Raskolenko, Yu. M. MaksimovAbstract:Ti2B5, TiB12, TiB≃25, TiB≃55, and TiB≃100 were prepared by Self-Propagating High-Temperature Synthesis and characterized by microstructural analysis, x-ray diffraction, and x-ray microanalysis. Data on the crystal structure, lattice parameters, and mechanical properties of the synthesized borides are presented.
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Electroimpulsive activation of Self-Propagating High-Temperature Synthesis in powder mixtures
Combustion Explosion and Shock Waves, 2000Co-Authors: A. I. Kirdyashkin, Yu. M. Maksimov, V. D. Kitler, V. V. Burkin, V. SedoiAbstract:The effect of frequency electroimpulsive treatment on the Self-Propagating High-Temperature Synthesis reaction in a powder mixture is studied with the use of the Ni-Al system as an example. The longitudinal direction of the electric field applied to the sample and of the electric current relative to the direction of combustion-wave propagation was used. It is established that under the action of electrotreatment, the linear combustion rate increases by a factor of 1.3-1.6, the structure is transformed, and the completeness of chemical transformation increases. It is shown that the effects observed are of a nonthermal nature.
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Formation of Self-Propagating High-Temperature Synthesis products in a magnetic field
Combustion Explosion and Shock Waves, 1999Co-Authors: A. I. Kirdyashkin, Yu. M. Maksimov, O. K. Lepakova, V. D. Kitler, V. V. Burkin, S. V. SinyaevAbstract:The combustion of compressed Ni+16% Al, Ni+50% Al, Co+30% S, Ti+58% FeB, Ti+20% C, and FeO+10% Fe+18% Al mixtures in a constant magnetic field is studied. The depth of conversion is found to increase and the geometric dimensions of the phase components of the reaction end products to coarsen under the influence of the field in the systems containing a ferromagnetic metal. The changes in the reaction product are related to additional mass transport behind the Self-Propagating High-Temperature Synthesis wave.
O. K. Lepakova - One of the best experts on this subject based on the ideXlab platform.
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Features of Self-Propagating High-Temperature Synthesis of spinel pigments
Combustion Explosion and Shock Waves, 2012Co-Authors: N. I. Radishevskaya, O. K. Lepakova, N. G. Kasatskii, A. Yu. Chapskaya, V. D. Kitler, O. V. L’vov, Yu. S. NaiborodenkoAbstract:The method of Self-Propagating High-Temperature Synthesis (SHS) was used to synthesize spinel ceramic pigments. Producing aluminum-nickel and aluminum-cobalt pigments in a finely dispersed state is a complex stepwise (combined) process involving a reduction stage and simultaneous natural air filtration. In the case of small-diameter samples, a flat combustion front is observed and in large samples, the front is formed of many hot spots. The dependence of combustion rate on porosity is presented. The maximum combustion rate of these systems are recorded for porosity of 50–60%. Powdered SHS pigments were obtained for the first time.
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Self-Propagating High-Temperature Synthesis of spinel-type pigments
Glass and Ceramics, 2006Co-Authors: N. I. Radishevskaya, O. K. Lepakova, N. G. Kasatskii, A. Yu. Chapskaya, V. D. Kitler, Yu. S. Naiborodenko, V. I. VereshchaginAbstract:The process of producing spinel-type pigments from a mixture of Al2O3 and Co2O3 with aluminum powder ASD-4 and MgO and ZnO additives by the method of Self-Propagating High-Temperature Synthesis (SHS) is investigated. A blue and an ultramarine pigment are obtained. Their phase composition, IR spectra, and structural and color characteristics are studied. It is demonstrated that the SHS method is promising for producing heat-resistant spinel-type pigments of a blue-sky-blue color range.
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Self-Propagating High-Temperature Synthesis of composite material TiB2-Fe
Journal of Materials Science, 2004Co-Authors: O. K. Lepakova, L. G. Raskolenko, Yu. M. MaksimovAbstract:Results of an investigation of the microstructure and phase composition of materials of the Ti-B-Fe system, obtained by Self-Propagating High-Temperature Synthesis (SHS) are presented.
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Titanium borides prepared by Self-Propagating High-Temperature Synthesis
Inorganic Materials, 2000Co-Authors: O. K. Lepakova, L. G. Raskolenko, Yu. M. MaksimovAbstract:Ti2B5, TiB12, TiB≃25, TiB≃55, and TiB≃100 were prepared by Self-Propagating High-Temperature Synthesis and characterized by microstructural analysis, x-ray diffraction, and x-ray microanalysis. Data on the crystal structure, lattice parameters, and mechanical properties of the synthesized borides are presented.
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Formation of Self-Propagating High-Temperature Synthesis products in a magnetic field
Combustion Explosion and Shock Waves, 1999Co-Authors: A. I. Kirdyashkin, Yu. M. Maksimov, O. K. Lepakova, V. D. Kitler, V. V. Burkin, S. V. SinyaevAbstract:The combustion of compressed Ni+16% Al, Ni+50% Al, Co+30% S, Ti+58% FeB, Ti+20% C, and FeO+10% Fe+18% Al mixtures in a constant magnetic field is studied. The depth of conversion is found to increase and the geometric dimensions of the phase components of the reaction end products to coarsen under the influence of the field in the systems containing a ferromagnetic metal. The changes in the reaction product are related to additional mass transport behind the Self-Propagating High-Temperature Synthesis wave.
V. G. Myagkov - One of the best experts on this subject based on the ideXlab platform.
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Multiple Self-Propagating High-Temperature Synthesis and solid-phase reactions in thin films
Journal of Experimental and Theoretical Physics, 1999Co-Authors: V. G. Myagkov, Liudmila E. Bykova, G. N. BondarenkoAbstract:A variety of Self-Propagating High-Temperature Synthesis in thin films has been found and investigated. This modification, called multiple Self-Propagating High-Temperature Synthesis, occurs in the solid phase and is a reversible phase transition. Multiple Self-Propagating High-Temperature Synthesis is similar in many respects to a metal—insulator phase transition. It is shown that for eutectic systems it is equivalent to a repeated transition through the eutectic temperature of bulk samples. It is inferred that multiple Self-Propagating High-Temperature Synthesis in bilayer films is governed by phase separation mechanisms that take place during eutectic solidification and eutectoid decomposition.
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Self-Propagating High-Temperature Synthesis and formation of quasicrystals in Al/Mn bilayer thin films
Journal of Experimental and Theoretical Physics Letters, 1998Co-Authors: V. G. Myagkov, Liudmila E. Bykova, G. N. BondarenkoAbstract:Self-Propagating High-Temperature Synthesis in Al/Mn bilayer thin films was investigated. It was found that a quasicrystalline phase forms after the passage of Self-Propagating High-Temperature Synthesis through the sample. It is shown that after multiple initiation (n>5) of Self-Propagating High-Temperature Synthesis in a sample the quasicrystalline phase transforms into a stable Al6Mn phase. It is conjectured that Self-Propagating High-Temperature Synthesis can play the main role in the formation of quasicrystals in other film systems as well.
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Self-Propagating High-Temperature Synthesis and solid-phase reactions in bilayer thin films
Technical Physics, 1998Co-Authors: V. G. Myagkov, Liudmila E. Bykova, V. S. Zhigalov, V. K. Mal’tsevAbstract:Self-Propagating High-Temperature Synthesis (SHS) in Al/Ni, Al/Fe, and Al/Co bilayer thin films is investigated. It is established that SHS is achieved in thin films at initiation temperatures 300–350° lower than in powders. The mechanism of SHS in thin films is similar to the process of explosive crystallization. It is shown that at the initial stage solid-phase reactions arising on the contact surface of condensate films can be Self-Propagating High-Temperature Synthesis. SHS could find application in different technologies for obtaining film components for microelectronics.
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Fractal clusters and Self-Propagating High-Temperature Synthesis in thin Al/Ge films
Journal of Experimental and Theoretical Physics Letters, 1998Co-Authors: V. G. Myagkov, Liudmila E. BykovaAbstract:Fractal clusters in amorphous thin films are examples of growth models. The main models are the Witten-Sander model and its modifications. It is believed that fractal patterns are formed in the course of the crystallization of an amorphous phase. It is shown that Self-Propagating High-Temperature Synthesis can be initiated in an Al/Ge film system and fractal patterns are formed in the reaction products. It is conjectured that the transition of an amorphous phase to a crystalline phase does not play a substantial role in the appearance of such patterns, while the formation of fractal clusters is determined by Self-Propagating High-Temperature Synthesis.
Liudmila E. Bykova - One of the best experts on this subject based on the ideXlab platform.
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Multiple Self-Propagating High-Temperature Synthesis and solid-phase reactions in thin films
Journal of Experimental and Theoretical Physics, 1999Co-Authors: V. G. Myagkov, Liudmila E. Bykova, G. N. BondarenkoAbstract:A variety of Self-Propagating High-Temperature Synthesis in thin films has been found and investigated. This modification, called multiple Self-Propagating High-Temperature Synthesis, occurs in the solid phase and is a reversible phase transition. Multiple Self-Propagating High-Temperature Synthesis is similar in many respects to a metal—insulator phase transition. It is shown that for eutectic systems it is equivalent to a repeated transition through the eutectic temperature of bulk samples. It is inferred that multiple Self-Propagating High-Temperature Synthesis in bilayer films is governed by phase separation mechanisms that take place during eutectic solidification and eutectoid decomposition.
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Self-Propagating High-Temperature Synthesis and formation of quasicrystals in Al/Mn bilayer thin films
Journal of Experimental and Theoretical Physics Letters, 1998Co-Authors: V. G. Myagkov, Liudmila E. Bykova, G. N. BondarenkoAbstract:Self-Propagating High-Temperature Synthesis in Al/Mn bilayer thin films was investigated. It was found that a quasicrystalline phase forms after the passage of Self-Propagating High-Temperature Synthesis through the sample. It is shown that after multiple initiation (n>5) of Self-Propagating High-Temperature Synthesis in a sample the quasicrystalline phase transforms into a stable Al6Mn phase. It is conjectured that Self-Propagating High-Temperature Synthesis can play the main role in the formation of quasicrystals in other film systems as well.
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Self-Propagating High-Temperature Synthesis and solid-phase reactions in bilayer thin films
Technical Physics, 1998Co-Authors: V. G. Myagkov, Liudmila E. Bykova, V. S. Zhigalov, V. K. Mal’tsevAbstract:Self-Propagating High-Temperature Synthesis (SHS) in Al/Ni, Al/Fe, and Al/Co bilayer thin films is investigated. It is established that SHS is achieved in thin films at initiation temperatures 300–350° lower than in powders. The mechanism of SHS in thin films is similar to the process of explosive crystallization. It is shown that at the initial stage solid-phase reactions arising on the contact surface of condensate films can be Self-Propagating High-Temperature Synthesis. SHS could find application in different technologies for obtaining film components for microelectronics.
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Fractal clusters and Self-Propagating High-Temperature Synthesis in thin Al/Ge films
Journal of Experimental and Theoretical Physics Letters, 1998Co-Authors: V. G. Myagkov, Liudmila E. BykovaAbstract:Fractal clusters in amorphous thin films are examples of growth models. The main models are the Witten-Sander model and its modifications. It is believed that fractal patterns are formed in the course of the crystallization of an amorphous phase. It is shown that Self-Propagating High-Temperature Synthesis can be initiated in an Al/Ge film system and fractal patterns are formed in the reaction products. It is conjectured that the transition of an amorphous phase to a crystalline phase does not play a substantial role in the appearance of such patterns, while the formation of fractal clusters is determined by Self-Propagating High-Temperature Synthesis.
Gao Jian - One of the best experts on this subject based on the ideXlab platform.
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Self - propagating high - temperature Synthesis of MoSi_2
Materials Science and Technology, 2005Co-Authors: Gao JianAbstract:Molybdenum disilicide was synthesized successfully from element Mo and Si powders using self -propagating high - temperature Synthesis technology. The effect of the particle size of reactants, the relative density of compact, the preheating temperature, the content of diluent and the reaction atmosphere on the SHS process of MoSi2 was discussed based on the experimental results. The phase constituent and the morphology of the final product were inspected by X - ray diffraction ( XRD) and scanning electron microscopy ( SEM) , respectively.
