Pub Date : 2022-01-01DOI: 10.30791/1028-978x-2022-12-5-11
S. Muslov, A. Lotkov, P. Sukhochev
In this paper, to analyze the elastic properties of Ti49Ni51 (at. %) and TiNi – TiFe crystals with and without martensitic transformations Every’s and Blackman’s diagrams are used as two ways to characterize the elastic properties of cubic materials. Paired correlations between the parameters (s2, s3), (s3, s1) и (F44, F12) are calculated. The evolution of the Cauchy pressure pC value depending on the content of iron atoms in the crystal lattice of alloys is considered. It is established that, regardless of the composition of the alloys, the Cauchy pressure is greater than zero and decreases almost monotonically from 100.5 to 35.0 GPa with an increase in the content of Fe atoms in the B2 crystal lattice of the TiNi – TiFe phase and an increase in its stability with respect to martensitic transformations (up to complete stabilization). This evolution of pC corresponds to the data according to which a significant component of the bonding forces in TiNi is a metallic bond, and with an increase in the concentration of Fe atoms in alloys instead of Ni atoms and approaching the composition of TiFe, the proportion of the covalent component of the bonding forces increases.
{"title":"Every, Blackman diagrams, Cauchy pressure and analysis of elastic properties of the crystal lattice of Ti49Ni51 (at. %) and TiNi – TiFe alloys with and without martensitic transformations","authors":"S. Muslov, A. Lotkov, P. Sukhochev","doi":"10.30791/1028-978x-2022-12-5-11","DOIUrl":"https://doi.org/10.30791/1028-978x-2022-12-5-11","url":null,"abstract":"In this paper, to analyze the elastic properties of Ti49Ni51 (at. %) and TiNi – TiFe crystals with and without martensitic transformations Every’s and Blackman’s diagrams are used as two ways to characterize the elastic properties of cubic materials. Paired correlations between the parameters (s2, s3), (s3, s1) и (F44, F12) are calculated. The evolution of the Cauchy pressure pC value depending on the content of iron atoms in the crystal lattice of alloys is considered. It is established that, regardless of the composition of the alloys, the Cauchy pressure is greater than zero and decreases almost monotonically from 100.5 to 35.0 GPa with an increase in the content of Fe atoms in the B2 crystal lattice of the TiNi – TiFe phase and an increase in its stability with respect to martensitic transformations (up to complete stabilization). This evolution of pC corresponds to the data according to which a significant component of the bonding forces in TiNi is a metallic bond, and with an increase in the concentration of Fe atoms in alloys instead of Ni atoms and approaching the composition of TiFe, the proportion of the covalent component of the bonding forces increases.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87438302","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 : 2022-01-01DOI: 10.30791/1028-978x-2022-5-40-48
I. E. Kalashnikov, L. Kobeleva, P. Bykov, A. Kolmakov, I. Katin, R. Mikheev
There was analyzed the distribution uniformity of reinforcing particles Ti2NbAl in composite materials (CM) based on aluminum alloy AO20-1, made by mechanical mixing. Samples with different structure dispersion were obtained by crystallization of a composite melt in molds made of materials with different thermal conductivity. There were used methods of digitizing the structure microphoto and mathematical statistics to estimation structural heterogeneity. Based on the results of processing the photographic images, there were constructed histograms of the frequencies of the distribution of intermetallic particles in the matrix. It is revealed that matrix structure refinement has positive effect on uniformity of the distribution. A significant decrease in the coefficient of variation for specimens with a finer structure also indicates a more uniform distribution of the reinforcing phase in this specimens. There was compared a wear resistance of the material and the uniformity of distribution of the Ti2NbAl powder in the matrix. A wear rate of composite materials was determined by testing on CETR UMT Multi-Specimen Test System under dry sliding friction conditions with sequential stepwise axial loading to values of 0.5, 1, 1.5, 2, 2.5, 3 MPa, at constant sliding speed of 0.5 m/s. The test time for each axial load was 2000 s, the friction path was 6000 m. It was observed a significant reduction in weight loss during friction for all CM samples as compared to the matrix alloy. The wear rate of CM specimens with a better distribution of the reinforcing component is reduced by more than 2.7 times as compared to specimens from the AO20-1 alloy, and with a less uniform distribution by 2.2 times
{"title":"Estimation of distribution uniformity of Ti2NbAl particles in an aluminum-matrix composite material","authors":"I. E. Kalashnikov, L. Kobeleva, P. Bykov, A. Kolmakov, I. Katin, R. Mikheev","doi":"10.30791/1028-978x-2022-5-40-48","DOIUrl":"https://doi.org/10.30791/1028-978x-2022-5-40-48","url":null,"abstract":"There was analyzed the distribution uniformity of reinforcing particles Ti2NbAl in composite materials (CM) based on aluminum alloy AO20-1, made by mechanical mixing. Samples with different structure dispersion were obtained by crystallization of a composite melt in molds made of materials with different thermal conductivity. There were used methods of digitizing the structure microphoto and mathematical statistics to estimation structural heterogeneity. Based on the results of processing the photographic images, there were constructed histograms of the frequencies of the distribution of intermetallic particles in the matrix. It is revealed that matrix structure refinement has positive effect on uniformity of the distribution. A significant decrease in the coefficient of variation for specimens with a finer structure also indicates a more uniform distribution of the reinforcing phase in this specimens. There was compared a wear resistance of the material and the uniformity of distribution of the Ti2NbAl powder in the matrix. A wear rate of composite materials was determined by testing on CETR UMT Multi-Specimen Test System under dry sliding friction conditions with sequential stepwise axial loading to values of 0.5, 1, 1.5, 2, 2.5, 3 MPa, at constant sliding speed of 0.5 m/s. The test time for each axial load was 2000 s, the friction path was 6000 m. It was observed a significant reduction in weight loss during friction for all CM samples as compared to the matrix alloy. The wear rate of CM specimens with a better distribution of the reinforcing component is reduced by more than 2.7 times as compared to specimens from the AO20-1 alloy, and with a less uniform distribution by 2.2 times","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88974181","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 : 2022-01-01DOI: 10.30791/1028-978x-2022-3-24-35
K. V. Antipov, I. Benarieb, Y. S. Oglodkova, A. Rudchenko
The results of comprehensive studies of a set of properties of experimental-industrial sheets and extruded profiles made of a new aluminum alloy V-1381 Al – Mg – Si – Cu systems (6xxxx series) are presented in the article. The alloy has shown high manufacturability in industrial production under extrusion, as well as in hot and cold rolling. Using the Thermo-Calc software package, the quenching mode of semi-finished products was selected, as well as the modes of artificial aging modes were investigated. It is shown that the alloy V-1381T1 is not inferior in its mechanical properties to the foreign analogue alloy AA6013, is characterized by a good combination of mechanical properties at room temperature (σu ≥ 380 MPa, σ0.2 ≥ 360 MPa, δ5 ≥ 13 %) and elevated temperatures, exceeds the widely used alloy D16chT in yield strength by 20%, while possessing a lower density, better corrosion resistance and ability to obtain welded joints. The new alloy V-1381 can be recommended for use in fuselage structural elements of aviation equipment, including replacing less corrosion-resistant non-welded alloys of the D16 type, which will increase the weight efficiency of the structure both due to increased strength and due to the replacement of riveted joints withwelded ones.
本文介绍了一种新型铝合金V-1381 Al - Mg - Si - Cu系(6xxxx系列)的实验-工业板材和挤压型材的一系列性能的综合研究结果。在工业生产中，该合金在挤压、冷轧和热轧条件下均表现出较高的可加工性。利用heat - calc软件选择了半成品的淬火方式，并对人工时效方式进行了研究。结果表明:V-1381T1合金的力学性能不逊于国外同类合金AA6013，具有良好的室温力学性能(σu≥380 MPa， σ0.2≥360 MPa， δ5≥13 %)与高温力学性能的结合，屈服强度比广泛使用的合金D16chT高20%，同时具有较低的密度、较好的耐腐蚀性和获得焊接接头的能力。新合金V-1381可以推荐用于航空设备的机身结构元件，包括取代抗腐蚀性较差的D16型非焊接合金，这将增加结构的重量效率，因为增加了强度，并且由于用焊接接头代替了铆接接头。
{"title":"Structure and properties of industrial semi-products of weldable corrosion-resistant Al – Mg – Si – Cu system aluminum alloy","authors":"K. V. Antipov, I. Benarieb, Y. S. Oglodkova, A. Rudchenko","doi":"10.30791/1028-978x-2022-3-24-35","DOIUrl":"https://doi.org/10.30791/1028-978x-2022-3-24-35","url":null,"abstract":"The results of comprehensive studies of a set of properties of experimental-industrial sheets and extruded profiles made of a new aluminum alloy V-1381 Al – Mg – Si – Cu systems (6xxxx series) are presented in the article. The alloy has shown high manufacturability in industrial production under extrusion, as well as in hot and cold rolling. Using the Thermo-Calc software package, the quenching mode of semi-finished products was selected, as well as the modes of artificial aging modes were investigated. It is shown that the alloy V-1381T1 is not inferior in its mechanical properties to the foreign analogue alloy AA6013, is characterized by a good combination of mechanical properties at room temperature (σu ≥ 380 MPa, σ0.2 ≥ 360 MPa, δ5 ≥ 13 %) and elevated temperatures, exceeds the widely used alloy D16chT in yield strength by 20%, while possessing a lower density, better corrosion resistance and ability to obtain welded joints. The new alloy V-1381 can be recommended for use in fuselage structural elements of aviation equipment, including replacing less corrosion-resistant non-welded alloys of the D16 type, which will increase the weight efficiency of the structure both due to increased strength and due to the replacement of riveted joints withwelded ones.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78748514","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 : 2022-01-01DOI: 10.30791/1028-978x-2022-1-48-54
A. G. Meilakh, Yu. V. Kontsevoy, E. Y. Goida, A. Shubin
By pressing, rolling and sintering, a composite material (CM) based on copper powder clad with Fe-Cu pseudo-alloy (PA) was created for the working layer of two-layer ruptured electrical contacts. Powder of activated carbon (CA) with a surface of 1000 m2/g served as the arc suppression component. Highly dispersed powders of Al2O3, Fe2Al5, and Fe were also used as additional components. Experimental linear dependences of the conductivity and hardness of copper-based composites on the concentration of individual functional additives have been established. With the addition of mixtures of additional components, CMs were obtained for the working layer of the contact with the following characteristics: electrical resistance — 3.2 – 4.5 μOhm·cm, hardness HB — 790 – 1030 MPa. For a given conductivity of a two-layer contact, which is ≥ 75 % of the conductivity of copper, the dependence of the maximum allowable resistivity of theworking layer (ρ) on the ratio of its thickness to the thickness of the copper layer is calculated. The optimal chemical composition of the working layer of the contact has been determined — 97 % Cu + 1 % CA + 2 % PA, providing high hardness 1030 MPa and electrical resistance 3.2 μOhm·cm. These characteristics allow creating an electrical contact with a ratio of the thickness of the working and copper layer equal to 1:1.
通过压制、轧制和烧结，制备了一种基于铜粉包覆Fe-Cu伪合金(PA)的复合材料(CM)，用于两层断裂电触点的工作层。活性炭粉(CA)的表面为1000 m2/g，作为灭弧组分。高分散的Al2O3、Fe2Al5和Fe粉末也被用作附加组分。建立了铜基复合材料的电导率和硬度随各功能添加剂浓度的线性关系。通过添加其他组分的混合物，获得了电阻为3.2 ~ 4.5 μOhm·cm，硬度HB为790 ~ 1030 MPa的接触面工作层cm。对于给定的两层接触的电导率≥铜电导率的75%，计算了工作层的最大允许电阻率(ρ)与其厚度与铜层厚度之比的依赖关系。确定了触点工作层的最佳化学成分- 97% Cu + 1 % CA + 2% PA，具有较高的硬度1030 MPa和电阻3.2 μOhm·cm。这些特性使工作层和铜层厚度的比例等于1:1的电接触成为可能。
{"title":"Electro-contact material based on copper powder clad with Fe – Cu pseudo-alloy","authors":"A. G. Meilakh, Yu. V. Kontsevoy, E. Y. Goida, A. Shubin","doi":"10.30791/1028-978x-2022-1-48-54","DOIUrl":"https://doi.org/10.30791/1028-978x-2022-1-48-54","url":null,"abstract":"By pressing, rolling and sintering, a composite material (CM) based on copper powder clad with Fe-Cu pseudo-alloy (PA) was created for the working layer of two-layer ruptured electrical contacts. Powder of activated carbon (CA) with a surface of 1000 m2/g served as the arc suppression component. Highly dispersed powders of Al2O3, Fe2Al5, and Fe were also used as additional components. Experimental linear dependences of the conductivity and hardness of copper-based composites on the concentration of individual functional additives have been established. With the addition of mixtures of additional components, CMs were obtained for the working layer of the contact with the following characteristics: electrical resistance — 3.2 – 4.5 μOhm·cm, hardness HB — 790 – 1030 MPa. For a given conductivity of a two-layer contact, which is ≥ 75 % of the conductivity of copper, the dependence of the maximum allowable resistivity of theworking layer (ρ) on the ratio of its thickness to the thickness of the copper layer is calculated. The optimal chemical composition of the working layer of the contact has been determined — 97 % Cu + 1 % CA + 2 % PA, providing high hardness 1030 MPa and electrical resistance 3.2 μOhm·cm. These characteristics allow creating an electrical contact with a ratio of the thickness of the working and copper layer equal to 1:1.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73796443","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 : 2022-01-01DOI: 10.30791/1028-978x-2022-10-64-82
I. Krylov, N. Korneeva, V. Kudinov
An universal method “Break upon Impact and Static” (RUS) has been developed for the experimental determination of the ultimate strength properties of polymer composite materials based on multifilament nanocrystalline ultra-high molecular weight polyethylene (UHMWPE) fibers, which differs in the method of fixing the sample in a testing machine.The method is carried out using a uniform BIS-sample with an intermediate matrix at the ends and equipment for its attachment to the platforms of testing machines. The sample is a round composite rod composed of the fibers and matrices under investigation, which is held in the tooling by an additional matrix that fixtures it under various loading rates. The RUS method was used to study the properties and mechanisms of destruction upon impact and in a static situation of anisotropic polymer and hybrid composite materials (PCM and HCM) based on flexible and rigid matrices reinforced with hybrid fibers of carbon, aramid, and UHMWPE-fibers activated by non-equilibrium low-temperature plasma. The breaking loads under low-velocity impact and static bending conditions, relative deformation, specific absorbed-in-fracture energy, work of adhesion, shear strength, and other properties are determined. It was found out that the plasticity of the matrix and the hybrid fiber composition affect the properties and fracture mode of PCM and HCM. For the destruction of HCM with a flexible matrix upon impact, a load twice as large as for composites with a rigid matrix is required. HCMs have the highest strength, in which at all stages of loading up to failure, joint deformation of the matrix and the reinforcing fiber occurs. The mechanism of deformation and destruction of anisotropic HCM upon impact is stepwise, while the nature of the deformation curve is zigzag. In statics, the deformation proceeds smoothly. By changing the ratio of carbon and UHMWPE-fibers during hybridization, it is possible to control the properties of HCM and improve its specific properties. The combination of carbon and UHMWPE-fibers in a hybrid fiber for reinforcing a flexible matrix makes it possible to create a material with a delayed fracture. It has been established that for HCM based on a flexible matrix reinforced with a hybrid fiber combining 20 % carbon and 80 % UHMWPE fiber, the fracture load increases by factor 2, the specific fracture work by 42 %, relative deformation by 68 %.
{"title":"Influence of rigid and flexible matrices on ultimate strength and fracture mechanisms of polymer composite materials upon impact and static loading conditions","authors":"I. Krylov, N. Korneeva, V. Kudinov","doi":"10.30791/1028-978x-2022-10-64-82","DOIUrl":"https://doi.org/10.30791/1028-978x-2022-10-64-82","url":null,"abstract":"An universal method “Break upon Impact and Static” (RUS) has been developed for the experimental determination of the ultimate strength properties of polymer composite materials based on multifilament nanocrystalline ultra-high molecular weight polyethylene (UHMWPE) fibers, which differs in the method of fixing the sample in a testing machine.The method is carried out using a uniform BIS-sample with an intermediate matrix at the ends and equipment for its attachment to the platforms of testing machines. The sample is a round composite rod composed of the fibers and matrices under investigation, which is held in the tooling by an additional matrix that fixtures it under various loading rates. The RUS method was used to study the properties and mechanisms of destruction upon impact and in a static situation of anisotropic polymer and hybrid composite materials (PCM and HCM) based on flexible and rigid matrices reinforced with hybrid fibers of carbon, aramid, and UHMWPE-fibers activated by non-equilibrium low-temperature plasma. The breaking loads under low-velocity impact and static bending conditions, relative deformation, specific absorbed-in-fracture energy, work of adhesion, shear strength, and other properties are determined. It was found out that the plasticity of the matrix and the hybrid fiber composition affect the properties and fracture mode of PCM and HCM. For the destruction of HCM with a flexible matrix upon impact, a load twice as large as for composites with a rigid matrix is required. HCMs have the highest strength, in which at all stages of loading up to failure, joint deformation of the matrix and the reinforcing fiber occurs. The mechanism of deformation and destruction of anisotropic HCM upon impact is stepwise, while the nature of the deformation curve is zigzag. In statics, the deformation proceeds smoothly. By changing the ratio of carbon and UHMWPE-fibers during hybridization, it is possible to control the properties of HCM and improve its specific properties. The combination of carbon and UHMWPE-fibers in a hybrid fiber for reinforcing a flexible matrix makes it possible to create a material with a delayed fracture. It has been established that for HCM based on a flexible matrix reinforced with a hybrid fiber combining 20 % carbon and 80 % UHMWPE fiber, the fracture load increases by factor 2, the specific fracture work by 42 %, relative deformation by 68 %.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"90 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73900554","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 : 2022-01-01DOI: 10.30791/1028-978x-2022-3-70-77
N. P. Cherezov, M. Alymov, V. V. Zakorzhevsky
The method of SHS (self-propagating high-temperature synthesis) allows the efficient synthesis of titanium hydride. The article presents new results of experimental studies of titanium powders synthesized by the method of SHS hydrogenation and dehydrogenation in a vacuum furnace. Changes in the microstructure, phase and chemical composition during hydrogenation-dehydrogenation of a titanium sponge were studied. The titanium sponge was hydrogenated in a high-pressure SHS reactor at a hydrogen pressure of 3 MPa. The content of oxygen and carbon impurities decrease in the process of SHS hydrogenation was found. After hydrogenation, the sponge is a single-phase δ-hydride of titanium with a tetragonal lattice, the particles have a fragmentary shape. In the obtained titanium hydride, an increased hydrogen content of 4.64 wt. % was noted. The hydrogenated titanium sponge was mechanically crushed in a drum-ball mill to a particle size of 40 – 250 microns. Dehydrogenation of titanium hydride powder was carried out in a vacuum furnace at a temperature of 850 °C for 220 minutes. Titanium after dehydrogenation is a single-phase α-titanium powder with a hexagonal close packed lattice, the size and shape of the particles have not changed. The technological process under study provides the possibility of obtaining high-quality titanium powders of the necessary granulometric composition for various fields of powder metallurgy.
{"title":"Research of titanium powder obtained by SHS–hydrogenation and dehydrogenation in a vacuum furnace","authors":"N. P. Cherezov, M. Alymov, V. V. Zakorzhevsky","doi":"10.30791/1028-978x-2022-3-70-77","DOIUrl":"https://doi.org/10.30791/1028-978x-2022-3-70-77","url":null,"abstract":"The method of SHS (self-propagating high-temperature synthesis) allows the efficient synthesis of titanium hydride. The article presents new results of experimental studies of titanium powders synthesized by the method of SHS hydrogenation and dehydrogenation in a vacuum furnace. Changes in the microstructure, phase and chemical composition during hydrogenation-dehydrogenation of a titanium sponge were studied. The titanium sponge was hydrogenated in a high-pressure SHS reactor at a hydrogen pressure of 3 MPa. The content of oxygen and carbon impurities decrease in the process of SHS hydrogenation was found. After hydrogenation, the sponge is a single-phase δ-hydride of titanium with a tetragonal lattice, the particles have a fragmentary shape. In the obtained titanium hydride, an increased hydrogen content of 4.64 wt. % was noted. The hydrogenated titanium sponge was mechanically crushed in a drum-ball mill to a particle size of 40 – 250 microns. Dehydrogenation of titanium hydride powder was carried out in a vacuum furnace at a temperature of 850 °C for 220 minutes. Titanium after dehydrogenation is a single-phase α-titanium powder with a hexagonal close packed lattice, the size and shape of the particles have not changed. The technological process under study provides the possibility of obtaining high-quality titanium powders of the necessary granulometric composition for various fields of powder metallurgy.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75782472","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 : 2022-01-01DOI: 10.30791/1028-978x-2022-10-31-34
A. G. Tarasov, V. Veretennikov
The article presents the results of experimental studying of corrosion resistance of corundum, titanium nitride and TiB2/TiNi powder samples in supercritical aqueous fluid (SAF). The tests were proceeded in autoclave (temperature of 400 °C, steam pressure of 100 MPa) during 100 hours. As a result, it was found that Al2O3 (corundum) and TiN are resistant materials, whereas the TiB2 phase of eutectic alloy dissolves in an aqueous SAF medium. Deep corrosion index value is considered.
{"title":"Corrosion resistance test of powders of corundum, titanium nitride, and TiB2/TiN eutectic composition alloy in the supercritical aqueous fluid","authors":"A. G. Tarasov, V. Veretennikov","doi":"10.30791/1028-978x-2022-10-31-34","DOIUrl":"https://doi.org/10.30791/1028-978x-2022-10-31-34","url":null,"abstract":"The article presents the results of experimental studying of corrosion resistance of corundum, titanium nitride and TiB2/TiNi powder samples in supercritical aqueous fluid (SAF). The tests were proceeded in autoclave (temperature of 400 °C, steam pressure of 100 MPa) during 100 hours. As a result, it was found that Al2O3 (corundum) and TiN are resistant materials, whereas the TiB2 phase of eutectic alloy dissolves in an aqueous SAF medium. Deep corrosion index value is considered.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80038047","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 : 2022-01-01DOI: 10.30791/1028-978x-2022-1-34-48
A. Babkin, E. Neskoromnaya, I. Burakova, A. Burakov, E. Mkrtchyan, A. Tkachev
The paper describes the extraction of the rare earth element Sm3+ from aqueous buffer systems by a graphene-based nanostructured composite, modified using an organic polymer – polyhydroquinone. The authors determined the important parameters of the sorption-desorption of Sm3+ ions on a new nanocomposite “graphene oxide/polyhydroquinone” during a batch test, such as: initial concentration, the sorbent weight, pH of the solution, sorption rate constants, maximum sorption capacity of the nanocomposite, percentage sorption and desorption, entropy and enthalpy of the Sm3+ extraction process. The kinetic, isothermal and thermodynamic dependences allowed to propose of the Sm3+ ions adsorption mechanisms. The kinetic data were processed by pseudo-first- and second-order, Elovich and intraparticle diffusion models, and adsorption isotherms — using the Langmuir, Freundlich, Temkin, Dubinin-Radushkevich equations. As a result of kinetic studies, the contact time of the samarium adsorption was determined — 15 min, while the sorption capacity was 100 mg·g–1. It was found that the absorption of Sm3+ ions proceeds by a mixed diffusion mechanism and limited by the interaction “samarium ions : sorbent functional groups”. According to the Langmuir model, the maximum sorbent sorption capacity was 333.3 mg·g–1. Thus, the high efficiency of the developed graphene oxide/polyhydroquinone nanocomposite for purification of aqueous media from rare earth elements was confirmed.
{"title":"Sorption-desorption properties of graphene oxide/polyhydroquinone nanocomposite in the extraction of rare earth elements Sm (III) ions from acetic-acetate buffer systems","authors":"A. Babkin, E. Neskoromnaya, I. Burakova, A. Burakov, E. Mkrtchyan, A. Tkachev","doi":"10.30791/1028-978x-2022-1-34-48","DOIUrl":"https://doi.org/10.30791/1028-978x-2022-1-34-48","url":null,"abstract":"The paper describes the extraction of the rare earth element Sm3+ from aqueous buffer systems by a graphene-based nanostructured composite, modified using an organic polymer – polyhydroquinone. The authors determined the important parameters of the sorption-desorption of Sm3+ ions on a new nanocomposite “graphene oxide/polyhydroquinone” during a batch test, such as: initial concentration, the sorbent weight, pH of the solution, sorption rate constants, maximum sorption capacity of the nanocomposite, percentage sorption and desorption, entropy and enthalpy of the Sm3+ extraction process. The kinetic, isothermal and thermodynamic dependences allowed to propose of the Sm3+ ions adsorption mechanisms. The kinetic data were processed by pseudo-first- and second-order, Elovich and intraparticle diffusion models, and adsorption isotherms — using the Langmuir, Freundlich, Temkin, Dubinin-Radushkevich equations. As a result of kinetic studies, the contact time of the samarium adsorption was determined — 15 min, while the sorption capacity was 100 mg·g–1. It was found that the absorption of Sm3+ ions proceeds by a mixed diffusion mechanism and limited by the interaction “samarium ions : sorbent functional groups”. According to the Langmuir model, the maximum sorbent sorption capacity was 333.3 mg·g–1. Thus, the high efficiency of the developed graphene oxide/polyhydroquinone nanocomposite for purification of aqueous media from rare earth elements was confirmed.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"79 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83779073","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 : 2022-01-01DOI: 10.30791/1028-978x-2022-6-37-45
P. Evdokimov, A. Kiseleva, A. Shibaev, O. Filippova, E. Novoseletskaya, A. Efimenko, I. M. Scherbakov, G. A. Shipunov, V. Dubrov, V. Putlayev
The possibility of obtaining highly porous composite hydrogel materials for biomedical applications based on tricalcium phosphate in a polyethylene glycol diacrylate matrix, aimed to repair bone defects, was studied. The influence of different contents of inorganic filler particles on the mechanical characteristics of highly porous hydrogel composites β-Ca3(PO4)2/polyethylene glycol diacrylate was studied. The possibility of creating highly porous composite materials with specified elastic properties is demonstrated. The dependence of the viscoelastic properties of the obtained materials on the size of the given porosity is shown. Varying the proportion of tricalcium phosphate in the highly porous hydrogel material makes it possible to control the relative stiffness of the composite.
{"title":"Highly porous composite hydrogel materials β-Ca3(PO4)2/polyethylene glycol diacrylate","authors":"P. Evdokimov, A. Kiseleva, A. Shibaev, O. Filippova, E. Novoseletskaya, A. Efimenko, I. M. Scherbakov, G. A. Shipunov, V. Dubrov, V. Putlayev","doi":"10.30791/1028-978x-2022-6-37-45","DOIUrl":"https://doi.org/10.30791/1028-978x-2022-6-37-45","url":null,"abstract":"The possibility of obtaining highly porous composite hydrogel materials for biomedical applications based on tricalcium phosphate in a polyethylene glycol diacrylate matrix, aimed to repair bone defects, was studied. The influence of different contents of inorganic filler particles on the mechanical characteristics of highly porous hydrogel composites β-Ca3(PO4)2/polyethylene glycol diacrylate was studied. The possibility of creating highly porous composite materials with specified elastic properties is demonstrated. The dependence of the viscoelastic properties of the obtained materials on the size of the given porosity is shown. Varying the proportion of tricalcium phosphate in the highly porous hydrogel material makes it possible to control the relative stiffness of the composite.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83579409","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 : 2022-01-01DOI: 10.30791/1028-978x-2022-7-35-48
A. A. Forysenkova, P. V. Slukin, E. Trofimchuk, G. Davydova, I. Fadeeva
Powders of copper, zinc, manganese-substituted tricalcium phosphates (TCP) were synthesized, the composition and structure of the obtained compounds were studied. It is shown how copper, zinc and manganese ions affect the phase composition and microstructure of powders substituted with TCP. Composite materials based on a blend of polyvinylpyrrolidone with alginate (PVP:ALG) containing copper, zinc, and manganese-substituted TCP have been obtained. The thermal stability and mechanical strength of composite films crosslinked with polyvalent metal ions have been studied. The least strong, but at the same time more thermally stable composites crosslinked with alkaline earth metal ions. The test for cytotoxicity of powders substituted TCP’ extracts and composites showed that the powders and composite materials with them are non-toxic and biocompatible. The study of the antibacterial activity of the materials against the Escherichia coli C600 strain showed that the growth of bacteria was inhibited by the samples containing copper-TCP and zinc-TCP. The composite with manganese-TCP showed no activity against Escherichia coli C600. Composites based on the PVP:ALG blend with copper, zinc-substituted TCP can be considered as materials with an antibacterial effect for use in medicine.
{"title":"Mineral-polymer composite with cation-substituted calcium phosphates","authors":"A. A. Forysenkova, P. V. Slukin, E. Trofimchuk, G. Davydova, I. Fadeeva","doi":"10.30791/1028-978x-2022-7-35-48","DOIUrl":"https://doi.org/10.30791/1028-978x-2022-7-35-48","url":null,"abstract":"Powders of copper, zinc, manganese-substituted tricalcium phosphates (TCP) were synthesized, the composition and structure of the obtained compounds were studied. It is shown how copper, zinc and manganese ions affect the phase composition and microstructure of powders substituted with TCP. Composite materials based on a blend of polyvinylpyrrolidone with alginate (PVP:ALG) containing copper, zinc, and manganese-substituted TCP have been obtained. The thermal stability and mechanical strength of composite films crosslinked with polyvalent metal ions have been studied. The least strong, but at the same time more thermally stable composites crosslinked with alkaline earth metal ions. The test for cytotoxicity of powders substituted TCP’ extracts and composites showed that the powders and composite materials with them are non-toxic and biocompatible. The study of the antibacterial activity of the materials against the Escherichia coli C600 strain showed that the growth of bacteria was inhibited by the samples containing copper-TCP and zinc-TCP. The composite with manganese-TCP showed no activity against Escherichia coli C600. Composites based on the PVP:ALG blend with copper, zinc-substituted TCP can be considered as materials with an antibacterial effect for use in medicine.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87116669","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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