Vol 15, No 4 (2019)
- Year: 2019
- Articles: 6
- URL: https://journals.eco-vector.com/byusu/issue/view/1134
New materials and technology
Consolidation of powder nanomaterials: review of development and application trends
Abstract
The article provides a brief review of literature data on production methods, properties and promising areas of application of consolidated materials obtained from nanopowders. The influence of the size of nanoparticles on the performance of various technologies and the density of the resulting products is considered.
7-16
Thermostimulation of titanium aluminide synthesis by high-calorie mixtures
Abstract
A comparative microstructural and phase analysis of titanium aluminide samples obtained by SHS method in shells from a highly exothermic thermite mixture and an equimolar mixture of Nickel and aluminum is carried out. The energy of exothermic reactions of the shells allows heating the charge on the basis of titanium and aluminum and starting the SHS reaction in it. In the sinter sample in the Ni-Al shell, the reaction of titanium aluminide synthesis was not complete; the samples have a high-porous structure with small frame inclusions of intermetallides. In the synthesis of samples in the shell of the thermite mixture obtained alloy, optimal porosity and structure. The main phase in the samples obtained in different modes is titanium aluminide, also in both samples there are inclusions enriched in titanium (Ti3Al, Ti2Al phases), while the phase analysis did not reveal the presence of the initial components of the charge.
17-23
SHS robust modes to restore molybdenum by combustion wave in MoO3 – Al system
Abstract
The work is devoted to the technology for the reduction of molybdenum from oxides by the method of self-propagating high-temperature synthesis in the MoO3 – AI system with the addition of aluminum. The experiment was carried out in two modes: in a reactor at different pressures without preliminary heating and in a furnace in air until the initiation of the SH-synthesis process. Samples of molybdenum metal were obtained in different synthesis modes. X-ray phase and X-ray spectral analysis showed that molybdenum is the main phase in the synthesized samples. The presence of slag oxide phases Al2O3 and MoO2 was detected.
27-32
Influence of micropores on structural instability of the combustion wave
Abstract
The article shows examples of visualization of the process of heat transfer by radiation in unstable combustion modes of porous powder materials, which are in good agreement with the results of high-speed video recording and micropyrometry. The mathematical model and the results of calculating the structure of the combustion wave in the Ni-Al system are presented. The contribution of radiative heat transfer at an adiabatic combustion temperature in the range of 8–10 % and the effect of its trigger shutdown with decreasing temperature were revealed.
33-40
Strategic directions of counteraction to certain types of crimes
Criminal-legal and operational-search aspects of counteraction to crimes of extremist orientation
Abstract
The article characterizes departmental, regulatory and doctrinal approaches to the nature and types of crimes of extremist orientation, as well as provides official statistical data on the dynamics of crime of this type. The author pays special attention to the sign of publicity of the act, used by the legislator in the differentiation of criminal responsibility for extremism.
43-46
Prospects of criminal liability of legal entities for crimes in the sphere of entrepreneurial activity in the context of the princi-ples of russian criminal law
Abstract
Abstract. The article critically analyzes the arguments of the proponents of introducing the possibility of criminal liability of legal entities into the Russian legislation.the Author gives additional arguments in favor of the fact that the introduction of the Institute of criminal liability of legal entities into the domestic legislation contradicts the principles of Russian criminal law and the doctrine of the subjective side of the crime. The scientist speaks in favor of the need to improve the effectiveness of existing legal instruments to counter socially dangerous acts committed by legal entities. The proposal is made to fix in the legislation the procedure of compulsory liquidation of a legal entity that acted as an instrument of committing a crime.
47-54