Perspektivnye Materialy最新文献_第4页

Structure and magnetic properties of (Sm,Zr)(Co,Fe,Cu)z alloy powders for bonded magnets 粘结磁体用(Sm,Zr)(Co,Fe,Cu)z合金粉末的结构与磁性能

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-1-46-54

N. Kolchugina, N. A. Dormidontov, P. A. Prokofev, Y. Milov, A. S. Andreenko, I. A. Sipin, A. G. Dormidontov, A. Bakulina

引用次数: 0

Effect of porosity of tricalcium phosphate-based materials on the behavior of mesenchymal stem cells 磷酸三钙基材料孔隙度对间充质干细胞行为的影响

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-6-24-32

P. Evdokimov, A. Kiseleva, D. Larionov, E. Novoseletskaya, A. Efimenko, I. M. Scherbakov, G. A. Shipunov, V. Dubrov, V. Putlayev

引用次数: 0

Dynamic strength of fine-grained alumina ceramics obtained by Spark Plasma Sintering 火花等离子烧结获得细晶氧化铝陶瓷的动态强度

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-2-62-76

N. Melekhin, M. Boldin, А. Popov, А. Bragov, А. R. Filippov, S. Shotin, A. Murashov, A. Nokhrin, V. Chuvil’deev, N. Tabachkova

{"title":"Dynamic strength of fine-grained alumina ceramics obtained by Spark Plasma Sintering","authors":"N. Melekhin, M. Boldin, А. Popov, А. Bragov, А. R. Filippov, S. Shotin, A. Murashov, A. Nokhrin, V. Chuvil’deev, N. Tabachkova","doi":"10.30791/1028-978x-2023-2-62-76","DOIUrl":"https://doi.org/10.30791/1028-978x-2023-2-62-76","url":null,"abstract":"The results of dynamic compressive testing of alumina samples with different grain sizes sintered from nano and fine α-Al2O3 powders are presented. The ceramics were obtained by spark plasma sintering (SPS). The effect of heating rate (Vh), sintering temperature (Ts), holding time (ts), cooling rate (Vc) on hardness, fracture toughness, dynamic strength stress (σY) of Al2O3 has been studied. An amorphous layer of nanometer thickness was present on the surface of nanopowders in the initial state. After sintering, the grain boundaries of the ceramics had a crystalline structure; no inclusions of the amorphous phase were found. It has been suggested that during the SPS process, an amorphous structure containing an excess free volume is transformed into a crystalline phase with the formation of dislocation-type defects at the grain boundaries, which create long-range internal stress fields. It is shown that nanopores less than 50 – 100 nm in size are present at the grain boundaries of sintered ceramics. It is shown that the nonmonotonic nature of the dependence of σY on the temperature and time of the SPS is due to the simultaneous change in the density, the nonequilibrium state of the grain boundaries, and the grain size of the ceramic. It is shown that a decrease in the degree of nonequilibrium of the grain boundaries of alumina due to an increase in the SPS temperature or an increase in the holding time makes it possible to increase the dynamic strength of alumina. It has been established that an increase in the cooling rate leads to the formation of compressive residual stresses and a slight increase in σY of ceramics. The maximum dynamic strength (σY = 1755 MPa) for alumina ceramics with average grain size 1.6 – 2 µm obtained by SPS (Vh = 50 °С/min, Ts = 1520 °С, ts = 50 min).","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"253 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76579727","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}

引用次数: 0

Influence of the number of impregnation stages on the macrostructural and strength characteristics of glassy carbon foams 浸渍阶段数对玻璃碳泡沫宏观结构和强度特性的影响

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-3-49-56

D. Ponomareva, E. I. Timoshchuk, R. E. Shirokov, E. Vasilyeva, I. I. Lyapin, V. Y. Takhtin

{"title":"Influence of the number of impregnation stages on the macrostructural and strength characteristics of glassy carbon foams","authors":"D. Ponomareva, E. I. Timoshchuk, R. E. Shirokov, E. Vasilyeva, I. I. Lyapin, V. Y. Takhtin","doi":"10.30791/1028-978x-2023-3-49-56","DOIUrl":"https://doi.org/10.30791/1028-978x-2023-3-49-56","url":null,"abstract":"The template synthesis of glassy carbon foams was used in the work and the influence of the initial template cell size, the concentration of the solution, and the number of impregnation stages on the macrostructural and strength characteristics of the obtained materials was studied. As a carbon precursor was used the solution of Novolac resin grade SFP-012A2, the coke residue of which is more than 57 wt. %. It was shown that increasing the number of impregnation stages makes it possible to improve strength characteristics while maintaining open porosity at the level of 90 %, while glassy carbon foam based on a polyurethane template with a porosity of 60 pores per inch and 4 stages of impregnation with a solution with a concentration of 30 wt. % has the best set of properties due to the uniform wall thickening in the material volume. The value of compressive strength was 1.12 MPa, which is 2 times higher than the value of foreign analogues, while the open porosity was 91 %. It has been established that a decrease in the size of the cells of the initial template can lead to embrittlement of the material due to the formation of a cluster of overlapped cells. Increasing the mechanical strength of glassy carbon foams while maintaining an open-cell structure expands the field of application of this class of materials.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78419477","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}

引用次数: 0

Study of the conditions for obtaining precursors intended for 3D technologies from a heat-resistant alloy based on RuAl 从基于RuAl的耐热合金中获得用于3D技术的前驱体的条件研究

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-5-5-21

K. Povarova, A. Drozdov, A. Samokhin, O. Skachkov, A. Fadeev, A. A. Dorofeev, V. Sirotinkin, A. Ashmarin, M. A. Bulakhtin, A. V. Antonova, A. Morozov

引用次数: 0

Compressibility of composite materials based on fibrous filler of various compositions 基于不同成分纤维填料的复合材料的可压缩性

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-7-57-64

T. Pereverzeva, E. Y. Efremova, N. Chernousova, O. Kozhevnikova, A. Dedov

{"title":"Compressibility of composite materials based on fibrous filler of various compositions","authors":"T. Pereverzeva, E. Y. Efremova, N. Chernousova, O. Kozhevnikova, A. Dedov","doi":"10.30791/1028-978x-2023-7-57-64","DOIUrl":"https://doi.org/10.30791/1028-978x-2023-7-57-64","url":null,"abstract":"The compressibility of composite materials obtained by impregnation with water dispersion of polyurethane of webs made of polyethylene terephthalate fibers with a diameter of 20 µm and a mixture of these fibers with polyethylene terephthalate fibers with a diameter of 42 µm is investigated. The influence of the composition on the formation of the structure of canvases and composite materials based on them is shown. In the process of heat treatment, the volume of webs made of fibers with a diameter of 20 µm increases and decreases for webs based on a mixture of fibers of different diameters. Compared with canvases, with a degree of impregnation less than 1.0, the water permeability of materials of various compositions increases by 1.5 – 2.0 times. A model is proposed to predict the degree of compressibility of composite materials from the degree of impregnation and load. It is established that compressibility of composite materials decreases when using a web as a fibrous filler in which the fibers are oriented perpendicular to the surface of the web. Less effective for reducing compressibility is the use of a web made of a mixture of fibers of different diameters as a fibrous filler.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82269800","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}

引用次数: 0

Biocompatibility of Ti – Al intermetallic coatings on titanium alloy Ti6Al4V Ti - Al金属间涂层在钛合金Ti6Al4V上的生物相容性

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-3-14-23

A. Burkov, P. Chigrin, E. Sazonova, P. A. Ilchenko

{"title":"Biocompatibility of Ti – Al intermetallic coatings on titanium alloy Ti6Al4V","authors":"A. Burkov, P. Chigrin, E. Sazonova, P. A. Ilchenko","doi":"10.30791/1028-978x-2023-3-14-23","DOIUrl":"https://doi.org/10.30791/1028-978x-2023-3-14-23","url":null,"abstract":"Titanium alloy Ti6Al4V is the most common metal material in orthopaedics. However, it is characterized by high elasticity and bioinertness, which makes it difficult to osseointegrate on its surface and leads to aseptic loosening of the implant, has insufficient corrosion resistance and high wear, leading to the accumulation of metal ions and wear particles in the body of patients. To eliminate these shortcomings, a Ti – Al coating was prepared by electrospark processing of the Ti6Al4V alloy in an equimolar mixture of titanium and aluminum granules. The prepared TiAl coating consists of intermetallic phases: Ti3Al, TiAl, TiAl2, and TiAl3, which have higher tribological properties. Thus, the average value of the friction coefficient of the sample with a TiAl coating was 12% lower, and the reduced wear was 2.36 times less than the original Ti6Al4V alloy one in a simulating body fluid. In addition, the deposition of a TiAl coating on the Ti6Al4V alloy makes it possible to increase the corrosion resistance of its surface. Biomedical studies have shown that the deposition of a TiAl coating on a Ti6Al4V alloy increases the resistance of erythrocytes to the hemolytic agent action. Improving the biological activity of the alloy surface during ESA deposition of TiAl coating leads to normal growth of fibroblasts on it without signs of cytotoxity. Treatment of samples with adhered cell culture by a solution of trypsin-Versen led to a reduction in the density of cells in the coating by 42 %, while in the alloy by 60 %. This indicates a better fibroblast attachment to the surface of the Ti-Al coating, compared to the Ti6Al4V alloy.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82911344","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}

引用次数: 0

Effect of mechanical activation time on structure and mechanical properties of W-Cu powder composite 机械活化时间对钨铜粉末复合材料组织和力学性能的影响

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-3-57-63

E. V. Evstratov, A. S. Baikin, S. I. Averin

{"title":"Effect of mechanical activation time on structure and mechanical properties of W-Cu powder composite","authors":"E. V. Evstratov, A. S. Baikin, S. I. Averin","doi":"10.30791/1028-978x-2023-3-57-63","DOIUrl":"https://doi.org/10.30791/1028-978x-2023-3-57-63","url":null,"abstract":"Mixtures of tungsten-copper powders (88.2 wt. % W + 11.8 wt. % Cu) with different granulometric composition after mechanical activation at different process times were studied. Before mechanical activation, W particles have a size of about 4 μm, and large agglomerates of tungsten particles are ~20 μm. The structures and elemental composition of W-Cu powder samples before and after mechanical activation (1, 3, 5, and 10 min) were studied by scanning electron microscopy and X-ray microanalysis. The strength (compression) tests of pressed samples in a cylindrical matrix 12 mm in diameter were carried out on an Instron 3382 testing machine. Powder compaction curves were obtained, the dependences of the pressing stress on density were plotted, and the dependence of the sample density on the mechanical activation time was determined. As a result of strength tests, the dependences of stress on strain were obtained. The highest density of the mixture is achieved when the duration of treatment in the mechanical activator is 5 min. A further increase in the processing time of the mixture leads to the grinding of the powder and the destruction of the agglomerates. The average particle size of the powder decreases, which leads to a deterioration in the compaction of the samples. At the same time, with an increase in the treatment time to 10 min, the distribution of copper particles over the sample improves simultaneously with a decrease in the size of its particles to 100 – 400 nm, which, apparently, affects the increase in strength.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84316884","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}

引用次数: 0

Ion-beam formation of a silver-containing surface of porous silicon 多孔硅含银表面的离子束形成

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-4-31-41

V. Perinsky, I. Perinskaya, I. Rodionov, L. Kuts

{"title":"Ion-beam formation of a silver-containing surface of porous silicon","authors":"V. Perinsky, I. Perinskaya, I. Rodionov, L. Kuts","doi":"10.30791/1028-978x-2023-4-31-41","DOIUrl":"https://doi.org/10.30791/1028-978x-2023-4-31-41","url":null,"abstract":"The results of a study of the formation of a silver-containing porous layer on the surface of single-crystal silicon KEF-4,5 by ion-beam alloying are presented. A computer simulation of the process of ion doping of silicon with KEF-4,5, high-energy helium and silver ions was carried out using the TRIM/SRIM software package in order to determine the dose and energy neighborhoods of helium and silver ions necessary and sufficient in the experiment. The relief of the porous surface, the density of quasi-pores on the surface of implanted silicon, the elemental composition of the obtained porous composite silver-containing layers, taking into account the effect of intermediate heat treatment on it, are studied. The ion-beam formation of a silver-containing coating ensures the creation of a developed surface relief at the nanoscale with high reproducibility and controllability inherent in the ion doping method, which contributes to an increase in the yield of usable solar cell products. The technological modes of high reproducibility and controllability inherent in the ion doping method are determined based on the experimental data obtained for studying the relief of a porous surface and the density of quasi-pores on the surface of implanted silicon from the energy and dose of helium ions. Based on the study of the elemental composition of the quasi-porous composite silver-containing layer obtained by implantation of silver ions, the recommended parameters of implantation of silver ions have been established.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75804745","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}

引用次数: 0

Effects of mesenchymal stem cells on the physical and mechanical properties of polyester scaffolds of different architectonics 间充质干细胞对不同结构聚酯支架物理力学性能的影响

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-5-22-34

I. Arutyunyan, A. Dunaev, E. M. Trifanova, M. Khvorostina, A. Elchaninov, A. Soboleva, T. Fatkhudinov, V. Popov

{"title":"Effects of mesenchymal stem cells on the physical and mechanical properties of polyester scaffolds of different architectonics","authors":"I. Arutyunyan, A. Dunaev, E. M. Trifanova, M. Khvorostina, A. Elchaninov, A. Soboleva, T. Fatkhudinov, V. Popov","doi":"10.30791/1028-978x-2023-5-22-34","DOIUrl":"https://doi.org/10.30791/1028-978x-2023-5-22-34","url":null,"abstract":"The biocompatibility of polylactic-co-glycolic acid (PLGA) scaffolds for tissue engineering constructions can be significantly improved by autologous mesenchymal stem cells (MSCs) colonization. However, the features of the cell colonization procedure can generally affect the changes in the physical and mechanical properties of these scaffolds, which are mostly determined by their architectonics. To study this issue, in this work, we have formed and investigated three types of experimental PLGA samples: 1). molded monolithic blocks; 2). porous scaffolds formed by plasticization in supercritical CO2 followed by foaming; and 3). electrospun fibrous non-woven scaffolds. The quantitative XTT test showed the nontoxicity of all studied samples, as well as the greater efficiency of the dynamic cell colonization method compared to the static one. After 48 hours of samples incubation with cell cultures, their physical and mechanical properties were noted to change both at macro- and microlevels. These changes, in our opinion, occur due to the processes of hydrolytic and enzymatic PLGA hydrolysis, as well as the effect of adhered MSCs on the scaffold internal structure and surface morphology. Similar transformations of certain physical, mechanical and structural properties of scaffolds based on other biodegradable polymers or their compositions can also occur as a result of their colonization with various cell cultures, which should be taken into account when applying the scaffolds to develop tissue engineering constructions.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"72 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88236543","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}

引用次数: 0