NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech最新文献

{"title":"The surface state assessment in corrosion equipment monitoring","authors":"S. S. Vinogradova, R. F. Tazieva, A. N. Akhmetova","doi":"10.1063/1.5122156","DOIUrl":"https://doi.org/10.1063/1.5122156","url":null,"abstract":"A periodic potentiostatic monitoring mode of the chromium-nickel steels surface state under the pitting corrosion is proposed. The scalar impedance angular coefficient calculated on the basis of the spectral analysis method application is shown to be used for assessing the chromium-nickel steel surface state. The software module used for calculating the studied steel grades angular coefficient values was developed and the module limit values characterizing the surface state were defined.A periodic potentiostatic monitoring mode of the chromium-nickel steels surface state under the pitting corrosion is proposed. The scalar impedance angular coefficient calculated on the basis of the spectral analysis method application is shown to be used for assessing the chromium-nickel steel surface state. The software module used for calculating the studied steel grades angular coefficient values was developed and the module limit values characterizing the surface state were defined.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130204789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determination of the molecular vacuum pump stage main parameters by the Monte-Carlo method","authors":"I. M. Safronov, E. Svichkar, V. S. Klucharov","doi":"10.1063/1.5122098","DOIUrl":"https://doi.org/10.1063/1.5122098","url":null,"abstract":"The problem of determining the conductivity of the channel formed by the wheel blades of a molecular vacuum pump is set within the framework of the study of the gas flow along curved structures, determine the conductivity of the channel, as well as the main pumping parameters of the wheel itself: the maximum speed of Smax and the maximum pressure ratio τmax, the probability of k1 \"direct\" transition of molecules from the suction side to the discharge side, and then the probability k2 \"reverse\" transition. Based on the results of this work, a program for determining the probabilities k1 and k2 was developed. The result is a graph of the dependence of the main pumping parameters of the wheel (Smax and τmax) on a number of parameters.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122675406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identification and monitoring of the polymer thermo-shrinkable couplings and coatings by the relief marking","authors":"A. Kondratov, E. P. Cherkasov, I. Nagornova","doi":"10.1063/1.5122149","DOIUrl":"https://doi.org/10.1063/1.5122149","url":null,"abstract":"The advanced identification and monitoring method of both shrink couplings and coatings operating, typically used as building services or utility lines, based on relief (tactile) marking is offered. The determination method of temperature operating marking mode for different shrink polymer types using adapted hot stamping press equipped both isothermal processing and thermo-cycling laboratory tools is proved. Applicability of the developed time-temperature superposition principle for polymer marking mode definition is shown as exemplified by both PET and PVC shrink films processing. The optimal time-temperature mode calculation procedures at the local polymer processing according to both shrinkage force maximum speed dropping criteria and fixed difference of polymer contractile force as a result as isothermal stamping processing are shown.The advanced identification and monitoring method of both shrink couplings and coatings operating, typically used as building services or utility lines, based on relief (tactile) marking is offered. The determination method of temperature operating marking mode for different shrink polymer types using adapted hot stamping press equipped both isothermal processing and thermo-cycling laboratory tools is proved. Applicability of the developed time-temperature superposition principle for polymer marking mode definition is shown as exemplified by both PET and PVC shrink films processing. The optimal time-temperature mode calculation procedures at the local polymer processing according to both shrinkage force maximum speed dropping criteria and fixed difference of polymer contractile force as a result as isothermal stamping processing are shown.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132433419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Formation of gas hydroxide of sulfur dioxide at liquid sulfur dioxide injection in a porous medium saturated with methane and water","authors":"M. Khasanov, S. R. Kildibaeva","doi":"10.1063/1.5122026","DOIUrl":"https://doi.org/10.1063/1.5122026","url":null,"abstract":"A mathematical model of injection of liquid sulfur dioxide into a porous medium saturated with water and methane, accompanied by the formation of SO2 gas hydrate on the frontal surface is presented. The dependences of the temperature and the coordinates for the formation front of sulfur dioxide gas hydrate on the pressure of the injection and the initial pressure of the layer are explored. It is established that at sufficiently high injection pressure values and the initial temperature of the layer, as well as the low values of the layer’s initial pressure, the temperature of the porous medium on the boundary of gas hydrate formation of sulfur dioxide may rise above the decomposition’s equilibrium temperature of the gas hydrate of sulfur dioxide. This corresponds to the appearance of a zone in a porous medium saturated with a mixture of water, sulfur dioxide and its gas hydrate, being in a state of phase equilibrium.A mathematical model of injection of liquid sulfur dioxide into a porous medium saturated with water and methane, accompanied by the formation of SO2 gas hydrate on the frontal surface is presented. The dependences of the temperature and the coordinates for the formation front of sulfur dioxide gas hydrate on the pressure of the injection and the initial pressure of the layer are explored. It is established that at sufficiently high injection pressure values and the initial temperature of the layer, as well as the low values of the layer’s initial pressure, the temperature of the porous medium on the boundary of gas hydrate formation of sulfur dioxide may rise above the decomposition’s equilibrium temperature of the gas hydrate of sulfur dioxide. This corresponds to the appearance of a zone in a porous medium saturated with a mixture of water, sulfur dioxide and its gas hydrate, being in a state of phase equilibrium.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132378729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using polyvinyl chloride for the synthesis of porous carbon materials with controlled texture parameters","authors":"I. V. Anikeeva, T. Gulyaeva, O. N. Semenova, U. K. Shteblau, A. V. Shibitova, T. Kalinina, Yu. G. Kryazhev","doi":"10.1063/1.5122126","DOIUrl":"https://doi.org/10.1063/1.5122126","url":null,"abstract":"The possibility of regulation of textural parameters for porous carbon materials derived from polyvinyl chloride was evaluated. Porous carbon materials were obtained by a two-stage process including dehydrochlorination of the initial polymer under the action of alkali (KOH) and subsequent heat treatment, i.e., carbonization at 400 °C and activation at 850-900 °C. Various approaches for controlling the porous structure of the final material were used. Thus, dehydrochlorination was carried out both by action of alkali in a solution in polar organic solvent and by mechanical treatment of polymer-alkali composition. In the case of dehydrochlorination in a solution, modifying additives of carbon nanoparticles (nanoglobular carbon, graphene-like species based on graphite oxide or reduced graphite oxide) were introduced. Different gases of reductive and oxidative nature, such as hydrogen, carbon dioxide and water vapor, were used for activation purpose. It was found that these approaches allow regulating the ratio of micro- and mesopores in the resulting porous carbon materials which can be used in different fields. These porous carbons are amorphous materials having a specific surface area (SBET) from 356 to 1115 m2/g, micropore volume from 0.12 to 0.39 cm3/g, and mesopore volume from 0.07 to 0.33 cm3/g.The possibility of regulation of textural parameters for porous carbon materials derived from polyvinyl chloride was evaluated. Porous carbon materials were obtained by a two-stage process including dehydrochlorination of the initial polymer under the action of alkali (KOH) and subsequent heat treatment, i.e., carbonization at 400 °C and activation at 850-900 °C. Various approaches for controlling the porous structure of the final material were used. Thus, dehydrochlorination was carried out both by action of alkali in a solution in polar organic solvent and by mechanical treatment of polymer-alkali composition. In the case of dehydrochlorination in a solution, modifying additives of carbon nanoparticles (nanoglobular carbon, graphene-like species based on graphite oxide or reduced graphite oxide) were introduced. Different gases of reductive and oxidative nature, such as hydrogen, carbon dioxide and water vapor, were used for activation purpose. It was found that these approaches allow regulating the rat...","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133194336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modified sulfur bitumen binders for bitumen-mineral compositions","authors":"V. Galdina, N. S. Galdin, M. S. Chernogorodova","doi":"10.1063/1.5122023","DOIUrl":"https://doi.org/10.1063/1.5122023","url":null,"abstract":"The properties of modified sulfur bitumen binders based on viscous petroleum bitumen, industrial sulfur and polymeric petroleum resin were studied. In selecting the compositions of the modified sulfur bitumen binders, the experiment planning method was used. Mathematical models showing the influence of sulfur and polymeric petroleum resin dosages on the modified sulfur bitumen binders properties were obtained. The regression equations make it possible to predict the properties and to optimize the binders compositions according to the operating conditions. Modified sulfur bitumen binders in comparison with the properties of the initial viscous road bitumen and sulfur bitumen binders are characterized by the relatively high indicators of thermal resistance, crack toughness, ductility, strain capacity and adhesion.The properties of modified sulfur bitumen binders based on viscous petroleum bitumen, industrial sulfur and polymeric petroleum resin were studied. In selecting the compositions of the modified sulfur bitumen binders, the experiment planning method was used. Mathematical models showing the influence of sulfur and polymeric petroleum resin dosages on the modified sulfur bitumen binders properties were obtained. The regression equations make it possible to predict the properties and to optimize the binders compositions according to the operating conditions. Modified sulfur bitumen binders in comparison with the properties of the initial viscous road bitumen and sulfur bitumen binders are characterized by the relatively high indicators of thermal resistance, crack toughness, ductility, strain capacity and adhesion.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133452819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a mathematical model and computer simulation of web transportation systems","authors":"E. Gusak, S. N. Litunov","doi":"10.1063/1.5122077","DOIUrl":"https://doi.org/10.1063/1.5122077","url":null,"abstract":"A mathematical model of the web transportation system of a plastic film production line is developed. Its numerical solution using MATLAB Simulating is performed. Consistently installed web carrying cylinders are shown to filter the oscillations of the input film tension. Oscillation filtering of the input tension is more effective with the increase in the web path between web transportation elements.A mathematical model of the web transportation system of a plastic film production line is developed. Its numerical solution using MATLAB Simulating is performed. Consistently installed web carrying cylinders are shown to filter the oscillations of the input film tension. Oscillation filtering of the input tension is more effective with the increase in the web path between web transportation elements.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"229 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131531301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The influence of climatic factors on the destruction of shock-loaded bearings of mobile machines","authors":"S. Korneev, Y. V. Yarmovich, A. M. Kaveev, S. V. Pashukevich, V. Permyakov, R. V. Buravkin, A. Anoprienko, S. A. Kornilovich","doi":"10.1063/1.5122088","DOIUrl":"https://doi.org/10.1063/1.5122088","url":null,"abstract":"The paper for the first time considers the causes of destruction of shock-loaded sealed rolling bearings lubricated with greases. A previously unimplemented version of the study of greases on the surfaces of bearing parts (bearing races of the inner and outer parts of the bearing, roller, and the separator) on a scanning electron microscope JEOLJMC-5700 is presented, besides, the X-ray phase analysis is performed. The work carried out allowed to draw conclusions about the influence of the climatic component, which affects the duration of the bearings. The reasons for the increase in the flow of failures due to the destruction of rolling bearings during the operation of equipment at low temperatures are substantiated.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124497066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Express-control of oil for prevention of internal combustion engine breakdowns in oil-and-gas machinery and equipment","authors":"R. Salikhov, V. Permyakov, S. Saveliev, V. Mikheev","doi":"10.1063/1.5122170","DOIUrl":"https://doi.org/10.1063/1.5122170","url":null,"abstract":"One of the objectives of technical diagnostics is enhancement of remaining life prediction accuracy. The article considers the problem of the change of cylinder-piston group wear intensity in internal combustion engines of transport and transport-technological machines as a result of motor oil water cut influence. In the operational process mass fraction of water in oil contributory to the increase of wear debris amount grows because of different reasons. As a result, motor oil dielectric permittivity changes, that in its turn permits to estimate indirectly remaining life of cylinder-piston group in internal combustion engines of transport and transport-technological machines. The research was carried out on transport and transport-technological machines exploited in Omsk region. The results derived allow drawing a conclusion that taking into account water cut factor permits to assign conducting technical diagnosis of internal combustion engines in proper time and thereby to reduce amount of unexpected breakdowns.One of the objectives of technical diagnostics is enhancement of remaining life prediction accuracy. The article considers the problem of the change of cylinder-piston group wear intensity in internal combustion engines of transport and transport-technological machines as a result of motor oil water cut influence. In the operational process mass fraction of water in oil contributory to the increase of wear debris amount grows because of different reasons. As a result, motor oil dielectric permittivity changes, that in its turn permits to estimate indirectly remaining life of cylinder-piston group in internal combustion engines of transport and transport-technological machines. The research was carried out on transport and transport-technological machines exploited in Omsk region. The results derived allow drawing a conclusion that taking into account water cut factor permits to assign conducting technical diagnosis of internal combustion engines in proper time and thereby to reduce amount of unexpected br...","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124515687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental research of the efficiency of gas filters with a short diffuser","authors":"N. Y. Fil’kin, V. Yusha, A. A. Kapelyukhovskaya","doi":"10.1063/1.5122110","DOIUrl":"https://doi.org/10.1063/1.5122110","url":null,"abstract":"The article considers gas adsorption and catalytic filters with a short diffuser for air cleaning from aerosol and gas impurities. In the course of the work, comparative experimental studies of a gas filter with a flat partition and a short diffuser with uneven concentric guides in terms of the gasdynamic efficiency criteria were carried out. A positive effect was revealed when replacing the flat partition with a short diffuser with uneven concentric guides, which presupposes reducing the aerodynamic resistance and obtaining a more uniform velocity field in the flow part of the filter. It has been established that the use of a short diffuser with uneven concentric guides allows reducing the thickness of the layer of adsorption and catalytic materials in filters by up to 30% compared to the basic structure with a flat partition.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125594907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}