Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2022-3-30-35
V. Anan’in, B. Kalin
In alloys with a GPU lattice, it is possible to observe a relaxation of the Snukovsky type if there is a certain amount of substitution impurities in it. However, it is impossible to calculate the diffusion coefficients of the introduction impurities by the measured relaxation time by analogy with BCC alloys, just because of the possible interaction with substitution atoms. However, in some cases, if reliable diffusion data are available for an alloy close in composition to the studied one, the relaxation time can be calculated from the ratio τr = τr0·exp(Hm/RTm), where Hm, Tm are the parameters of the relaxation maximum of the impurity from the experiment, and τr0 can be calculated from the formula D0 = c02/(16·τr0) for the GPU lattice, taking D0 from the corresponding diffusion expert data. In this way, the diffusion coefficients of the introduction impurities in the alloy Zr – 1 wt. % Nb are calculated for several states of samples.
{"title":"Measurement of diffusion coefficients of interstitial impurities in Zr – 1 wt. % Nb alloy by internal friction method","authors":"V. Anan’in, B. Kalin","doi":"10.30791/0015-3214-2022-3-30-35","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-3-30-35","url":null,"abstract":"In alloys with a GPU lattice, it is possible to observe a relaxation of the Snukovsky type if there is a certain amount of substitution impurities in it. However, it is impossible to calculate the diffusion coefficients of the introduction impurities by the measured relaxation time by analogy with BCC alloys, just because of the possible interaction with substitution atoms. However, in some cases, if reliable diffusion data are available for an alloy close in composition to the studied one, the relaxation time can be calculated from the ratio τr = τr0·exp(Hm/RTm), where Hm, Tm are the parameters of the relaxation maximum of the impurity from the experiment, and τr0 can be calculated from the formula D0 = c02/(16·τr0) for the GPU lattice, taking D0 from the corresponding diffusion expert data. In this way, the diffusion coefficients of the introduction impurities in the alloy Zr – 1 wt. % Nb are calculated for several states of samples.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122438359","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2019-6-7-13
A. B. Tsepelev
{"title":"Peak module effect under nanoindentation of Fe-20Cr alloy","authors":"A. B. Tsepelev","doi":"10.30791/0015-3214-2019-6-7-13","DOIUrl":"https://doi.org/10.30791/0015-3214-2019-6-7-13","url":null,"abstract":"","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"232 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123254494","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2022-4-45-53
Е. I. Senkina, А. S. Buyakov, А. S. Lozhkomoev
Modification of porous ceramic materials makes it possible to improve their functional characteristics. In this work, we demonstrate the possibility of modifying macroporous Al2O3 ceramics with boehmite nanosheet structures using electroexplosive Al/AlN nanoparticles. To do this, the porous ceramic was impregnated with a suspension of nanoparticles in ethanol, after which the reaction of hydrolysis and oxidation of the nanoparticles fixed in the volume of the porous ceramic was carried out at 60 °C. As a result of the reaction, nanosheet structures of fine-grained boehmite were formed on the ceramic surface. This made it possible to substantially increase the specific surface area of the sample to 25.9 m2/g. and significantly improve the sorption characteristics of macro-simple Al2O3 ceramics in relation to the eosin dye. During the protective action, it was possible to adsorb up to 2.9 mg/g of the dye at a linear flow rate of 0.15 cm/s.
{"title":"Modification of porous α-Al2O3 ceramics by boehmite nanoleaf structures","authors":"Е. I. Senkina, А. S. Buyakov, А. S. Lozhkomoev","doi":"10.30791/0015-3214-2022-4-45-53","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-4-45-53","url":null,"abstract":"Modification of porous ceramic materials makes it possible to improve their functional characteristics. In this work, we demonstrate the possibility of modifying macroporous Al2O3 ceramics with boehmite nanosheet structures using electroexplosive Al/AlN nanoparticles. To do this, the porous ceramic was impregnated with a suspension of nanoparticles in ethanol, after which the reaction of hydrolysis and oxidation of the nanoparticles fixed in the volume of the porous ceramic was carried out at 60 °C. As a result of the reaction, nanosheet structures of fine-grained boehmite were formed on the ceramic surface. This made it possible to substantially increase the specific surface area of the sample to 25.9 m2/g. and significantly improve the sorption characteristics of macro-simple Al2O3 ceramics in relation to the eosin dye. During the protective action, it was possible to adsorb up to 2.9 mg/g of the dye at a linear flow rate of 0.15 cm/s.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130804681","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2023-2-68-77
А. S. Lozhkomoev, S. Kazantsev, О. V. Bakina, А. S. Buyakov, Е. I. Senkina, М. G. Krinitcyn, V. Ivanyuk, А. Sharipova, М. I. Lerner
Bioresorption of implants is a widely studied phenomenon today. Complete degradation of the implant after performing its mechanical function is the safest outcome for the patient. It also excludes revision prosthetics. Promising materials include metals and composites based on them. Currently, research on the development of biorezorable nanocomposite structures based on iron is actively underway. Often during orthopedic surgery, infections can enter the patient’s body. Therefore, various ways of modifying the implants with antibiotics are being developed. One of the modification options suggests that an antibacterial coating on the surface of the scaffold can be obtained by impregnating it with solutions of bioresorbable polymers filled with drugs. Variation in polymer composition, antibiotic concentration, and impregnation cycles makes it possible to obtain the necessary drug release parameters to achieve an optimal therapeutic effect. Since the object of our study, iron, does not have antimicrobial properties, in this work we considered the possibility of modifying Fe scaffolds with vancomycin by impregnation with antibiotic solution and polylactic acid (PLA) solution containing vancomycin. The process of drug release in physiological solution (0.9 % NaCl) and antibacterial properties of the obtained materials were studied. The structure and composition of the scaffolds and mechanical characteristics were also investigated. It was shown that modification of the surface of the scaffolds with polylactic acid leads to an increase in the ultimate strength by 40 % and to an overall smoothing of the deformation curve. The study showed that the introduction of vancomycin into the polymer allows obtaining an antibacterial coating on the surface of the scaffold with a prolonged release of the drug.
{"title":"Preparation of iron-based scaffolds with antibacterial coating based on polylactic acid and vancomycin","authors":"А. S. Lozhkomoev, S. Kazantsev, О. V. Bakina, А. S. Buyakov, Е. I. Senkina, М. G. Krinitcyn, V. Ivanyuk, А. Sharipova, М. I. Lerner","doi":"10.30791/0015-3214-2023-2-68-77","DOIUrl":"https://doi.org/10.30791/0015-3214-2023-2-68-77","url":null,"abstract":"Bioresorption of implants is a widely studied phenomenon today. Complete degradation of the implant after performing its mechanical function is the safest outcome for the patient. It also excludes revision prosthetics. Promising materials include metals and composites based on them. Currently, research on the development of biorezorable nanocomposite structures based on iron is actively underway. Often during orthopedic surgery, infections can enter the patient’s body. Therefore, various ways of modifying the implants with antibiotics are being developed. One of the modification options suggests that an antibacterial coating on the surface of the scaffold can be obtained by impregnating it with solutions of bioresorbable polymers filled with drugs. Variation in polymer composition, antibiotic concentration, and impregnation cycles makes it possible to obtain the necessary drug release parameters to achieve an optimal therapeutic effect. Since the object of our study, iron, does not have antimicrobial properties, in this work we considered the possibility of modifying Fe scaffolds with vancomycin by impregnation with antibiotic solution and polylactic acid (PLA) solution containing vancomycin. The process of drug release in physiological solution (0.9 % NaCl) and antibacterial properties of the obtained materials were studied. The structure and composition of the scaffolds and mechanical characteristics were also investigated. It was shown that modification of the surface of the scaffolds with polylactic acid leads to an increase in the ultimate strength by 40 % and to an overall smoothing of the deformation curve. The study showed that the introduction of vancomycin into the polymer allows obtaining an antibacterial coating on the surface of the scaffold with a prolonged release of the drug.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131213232","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2021-2-5-26
G. Remnev, V. Tarbokov, S. Pavlov
The review is devoted to the use of powerful submicrosecond ion beams for the synthesis and modification of material properties. Powerful ion beams, originally developed for the problems of inertial thermonuclear fusion, have been increasingly used over the past 30 years as a powerful pulsed heating source providing ample opportunities for modifying the surface layer of materials. By varying the key parameters of the beams, such as the composition (type of ions), the duration of the accelerating pulse (10 ns – 1 μs), the kinetic energy of the ions (0.1 – 1 MeV), the energy density transmitted by the beam to the target surface per pulse (0.1 – 50 J/cm2), the main areas of application of high-power ion beams in materials science were determined: modification of the surface layer by ultrafast quenching, melting and ultrafast recrystallization with the formation of micro- and nanostructures, pulsed implantation of ions accompanied by energetic action, deposition of thin films and synthesis of nanosized powders from ablative plasma.
{"title":"Material modification by high-intense pulsed ion beams","authors":"G. Remnev, V. Tarbokov, S. Pavlov","doi":"10.30791/0015-3214-2021-2-5-26","DOIUrl":"https://doi.org/10.30791/0015-3214-2021-2-5-26","url":null,"abstract":"The review is devoted to the use of powerful submicrosecond ion beams for the synthesis and modification of material properties. Powerful ion beams, originally developed for the problems of inertial thermonuclear fusion, have been increasingly used over the past 30 years as a powerful pulsed heating source providing ample opportunities for modifying the surface layer of materials. By varying the key parameters of the beams, such as the composition (type of ions), the duration of the accelerating pulse (10 ns – 1 μs), the kinetic energy of the ions (0.1 – 1 MeV), the energy density transmitted by the beam to the target surface per pulse (0.1 – 50 J/cm2), the main areas of application of high-power ion beams in materials science were determined: modification of the surface layer by ultrafast quenching, melting and ultrafast recrystallization with the formation of micro- and nanostructures, pulsed implantation of ions accompanied by energetic action, deposition of thin films and synthesis of nanosized powders from ablative plasma.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126617863","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2022-4-23-31
A. M. Kruchinin, M. Pogrebisskiy, E. Ryazanova, A. Chursin
The structure of the complex process of heating with an electric arc in an arc steelmaking furnace (ASF) due to radiation and convection depends primarily on the length of the arc. Identification of arc length required in process of melting control in ASF is impossible without knowledge of arc voltage gradient values. The arc voltage gradient is highly dependent on the temperature of the furnace and thereby on the heat exchange conditions of the arc in the melting space of the furnace during melting. Using the example of ASF, an engineering technique for determining the arc voltage gradient as a multifactorial basic electrical characteristic is proposed. Using the methods of the electric arc heat exchange model allows performing a basic two-factor version of the analytical calculation of the average voltage gradient of the arc column as a function of two parameters - the reactance of the furnace and the secondary voltage of the furnace transformer. Correction of the basic function is shown taking into account the value of the resistance of the equivalent ASF circuit and the electrode thermal mode index. The proposed method allows, already at the stage of development of the detailed design specification, to calculate analytically the most important energy physical characteristics of the ASF and, as a result, to choose a rational electrical mode of the ASF in order to improve energy and dynamic smelting indicators.
{"title":"The arc voltage gradient as a multifactorial basic electrical characteristic of an arc steelmaking furnace","authors":"A. M. Kruchinin, M. Pogrebisskiy, E. Ryazanova, A. Chursin","doi":"10.30791/0015-3214-2022-4-23-31","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-4-23-31","url":null,"abstract":"The structure of the complex process of heating with an electric arc in an arc steelmaking furnace (ASF) due to radiation and convection depends primarily on the length of the arc. Identification of arc length required in process of melting control in ASF is impossible without knowledge of arc voltage gradient values. The arc voltage gradient is highly dependent on the temperature of the furnace and thereby on the heat exchange conditions of the arc in the melting space of the furnace during melting. Using the example of ASF, an engineering technique for determining the arc voltage gradient as a multifactorial basic electrical characteristic is proposed. Using the methods of the electric arc heat exchange model allows performing a basic two-factor version of the analytical calculation of the average voltage gradient of the arc column as a function of two parameters - the reactance of the furnace and the secondary voltage of the furnace transformer. Correction of the basic function is shown taking into account the value of the resistance of the equivalent ASF circuit and the electrode thermal mode index. The proposed method allows, already at the stage of development of the detailed design specification, to calculate analytically the most important energy physical characteristics of the ASF and, as a result, to choose a rational electrical mode of the ASF in order to improve energy and dynamic smelting indicators.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114829469","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2022-3-14-19
S. V. Simakov, N. Vinogradova, O. N. Nikitushkina
The effect of laser action on the structure of a model material — pure aluminum — is studied. Laser treatment of aluminum samples was carried out on a 15 J Nd:YAG laser, 10 pulses with a duration of 5·10–8 s. In the experiment, a transparent medium was used to exclude the influence of the thermal mechanism and create conditions for the shock-wave mechanism of action on the material. The structure was studied by transmission electron microscopy. After laser irradiation in pure aluminum, the formation of crystallographically oriented voids with transverse dimensions of 50 – 100 nm and a length of up to 500 – 800 nm was found. The mechanism of formation of such formations is discussed.
{"title":"Pulsed laser action on pure aluminum","authors":"S. V. Simakov, N. Vinogradova, O. N. Nikitushkina","doi":"10.30791/0015-3214-2022-3-14-19","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-3-14-19","url":null,"abstract":"The effect of laser action on the structure of a model material — pure aluminum — is studied. Laser treatment of aluminum samples was carried out on a 15 J Nd:YAG laser, 10 pulses with a duration of 5·10–8 s. In the experiment, a transparent medium was used to exclude the influence of the thermal mechanism and create conditions for the shock-wave mechanism of action on the material. The structure was studied by transmission electron microscopy. After laser irradiation in pure aluminum, the formation of crystallographically oriented voids with transverse dimensions of 50 – 100 nm and a length of up to 500 – 800 nm was found. The mechanism of formation of such formations is discussed.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121691393","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2019-4-78-85
I. Perinskaya, V. Perinsky
{"title":"Physical and chemical characteristics of copper microstrip lines of microwave integrated circuits passivated with accelerated Ar ions","authors":"I. Perinskaya, V. Perinsky","doi":"10.30791/0015-3214-2019-4-78-85","DOIUrl":"https://doi.org/10.30791/0015-3214-2019-4-78-85","url":null,"abstract":"","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115452379","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2022-6-33-43
I. Grishin, N. Smirnov, D. N. Smirnova
The work is devoted to investigation of the process of mechanochemical synthesis of porous silicon oxycarbide composites. The synthesis was carried out by mechanical treatment of several mixtures of activated carbon and white soot with different mass ratios. Samples were investigated using such methods as X-ray diffraction, infrared spectroscopy, low-temperature nitrogen adsorption/desorption and potentiometric titration. Synchronous thermal analysis including thermogravimetric analysis and differential scanning calorimetry was performed. The results of X-ray diffraction analysis showed that no new phases were formed in the process of mechanochemical synthesis, and the structure of composites obtained can be characterized as highly amorphous. The possibility of activated carbon and white soot to be chemically bonded with the formation of silicon oxycarbides, which act as a binder in the composite structure, during intensive supply of mechanical energy to raw materials was proved. Thermal stability of silicon oxycarbides formed and the amount of free carbon that was not bonded with silicon dioxide were estimated by synchronous thermal analysis. It was established that the initial mixture composition significantly affects the surface chemistry of composites synthesized, which is expressed by a change in concentration of different surface functional groups. A possible mechanism of solid phase interaction between activated carbon and white soot resulting in the formation of Si–O–C bonds was proposed. Investigation of porous structure of composite materials obtained showed that the specific surface area and pore volume become lower with an increase in white soot concentration in the initial mixture. It is possible to adjust the porous structure of composites by changing the activated carbon to white soot mass ratio.
{"title":"Mechanochemical synthesis of porous silicon oxycarbide composites","authors":"I. Grishin, N. Smirnov, D. N. Smirnova","doi":"10.30791/0015-3214-2022-6-33-43","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-6-33-43","url":null,"abstract":"The work is devoted to investigation of the process of mechanochemical synthesis of porous silicon oxycarbide composites. The synthesis was carried out by mechanical treatment of several mixtures of activated carbon and white soot with different mass ratios. Samples were investigated using such methods as X-ray diffraction, infrared spectroscopy, low-temperature nitrogen adsorption/desorption and potentiometric titration. Synchronous thermal analysis including thermogravimetric analysis and differential scanning calorimetry was performed. The results of X-ray diffraction analysis showed that no new phases were formed in the process of mechanochemical synthesis, and the structure of composites obtained can be characterized as highly amorphous. The possibility of activated carbon and white soot to be chemically bonded with the formation of silicon oxycarbides, which act as a binder in the composite structure, during intensive supply of mechanical energy to raw materials was proved. Thermal stability of silicon oxycarbides formed and the amount of free carbon that was not bonded with silicon dioxide were estimated by synchronous thermal analysis. It was established that the initial mixture composition significantly affects the surface chemistry of composites synthesized, which is expressed by a change in concentration of different surface functional groups. A possible mechanism of solid phase interaction between activated carbon and white soot resulting in the formation of Si–O–C bonds was proposed. Investigation of porous structure of composite materials obtained showed that the specific surface area and pore volume become lower with an increase in white soot concentration in the initial mixture. It is possible to adjust the porous structure of composites by changing the activated carbon to white soot mass ratio.","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"175 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115465165","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}
Pub Date : 1900-01-01DOI: 10.30791/0015-3214-2022-1-45-56
S. Timofeev, A. Lozhkomoev, S. Kazancev, I. Tihonova, M. Lerner
In this work, for the preparation of AlOOH/CuO/Cu composite nanoparticles, nanoparticles based on Al, Cu, their compounds (Cu2Al, Cu9Al4, Cu4Al, CuAl ) And AlN were first obtained and characterized. The regularities of the oxidation of Al/ AlN/Cu nanoparticles in distilled water have been investigated. The optimal parameters for the synthesis of AlOOH/CuO/Cu composite nanoparticles from Al /AlN/Cu nanoparticles have been determined. The morphology of the obtained nanoparticles is shown using electron microscopy. The composition of the precursor and oxidation products was determined by the method of qualitative X-ray phase analysis. The average size of nanoparticles was determined by statistical processing of TEM images of nanoparticles. To construct the diagrams by size, the sizes of at least 1500 nanoparticles were taken into account. The specific surface area was investigated by thermal nitrogen desorption. To determine the optimal synthesis parameters, the oxidation reaction was carried out at different temperatures: 40, 50, 60, 70, 80, 90 °C with an accuracy of maintaining the set temperature of ± 0.1 °C. During the oxidation reaction of Al/AlN/Cu with water, the pH of the reaction mixture was controlled. It was found that the optimum reaction temperature is 60 °C. As a result of the synthesis, porous structures are formed, consisting of nanolobes of fine-crystalline boehmite with a size of 100 – 300 nm and a thickness of 5 – 7 nm, combined into agglomerates, in the center of which copper-based compounds are located. The specific surface area of the reaction products reaches 160 m2/g. The presence of AlN nanoparticles in the composition promotes a more complete conversion of copper and intermetallic compounds with the formation of CuO and Cu2O. It has been shown that the synthesized nanoparticles can be used as an antimicrobial component in the composition of hybrid materials based on polyvinylpyrrolidone and PEG alloy (400 and 20.000).
{"title":"Synthesis, properties and application of composite nanoparticles obtained by water oxidation of Al/AlN/Cu electroexplosive nanopowder","authors":"S. Timofeev, A. Lozhkomoev, S. Kazancev, I. Tihonova, M. Lerner","doi":"10.30791/0015-3214-2022-1-45-56","DOIUrl":"https://doi.org/10.30791/0015-3214-2022-1-45-56","url":null,"abstract":"In this work, for the preparation of AlOOH/CuO/Cu composite nanoparticles, nanoparticles based on Al, Cu, their compounds (Cu2Al, Cu9Al4, Cu4Al, CuAl ) And AlN were first obtained and characterized. The regularities of the oxidation of Al/ AlN/Cu nanoparticles in distilled water have been investigated. The optimal parameters for the synthesis of AlOOH/CuO/Cu composite nanoparticles from Al /AlN/Cu nanoparticles have been determined. The morphology of the obtained nanoparticles is shown using electron microscopy. The composition of the precursor and oxidation products was determined by the method of qualitative X-ray phase analysis. The average size of nanoparticles was determined by statistical processing of TEM images of nanoparticles. To construct the diagrams by size, the sizes of at least 1500 nanoparticles were taken into account. The specific surface area was investigated by thermal nitrogen desorption. To determine the optimal synthesis parameters, the oxidation reaction was carried out at different temperatures: 40, 50, 60, 70, 80, 90 °C with an accuracy of maintaining the set temperature of ± 0.1 °C. During the oxidation reaction of Al/AlN/Cu with water, the pH of the reaction mixture was controlled. It was found that the optimum reaction temperature is 60 °C. As a result of the synthesis, porous structures are formed, consisting of nanolobes of fine-crystalline boehmite with a size of 100 – 300 nm and a thickness of 5 – 7 nm, combined into agglomerates, in the center of which copper-based compounds are located. The specific surface area of the reaction products reaches 160 m2/g. The presence of AlN nanoparticles in the composition promotes a more complete conversion of copper and intermetallic compounds with the formation of CuO and Cu2O. It has been shown that the synthesized nanoparticles can be used as an antimicrobial component in the composition of hybrid materials based on polyvinylpyrrolidone and PEG alloy (400 and 20.000).","PeriodicalId":366423,"journal":{"name":"Physics and Chemistry of Materials Treatment","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129092503","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}
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