Perspektivnye Materialy最新文献

{"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}

{"title":"Influence of high porous ceramic material-implant based on ZrO2–Y2O3–Al2O3 system on life activity","authors":"M. Kalinina, N. Y. Fedorenko, M. Rubina, D. Suslov, Y. Andozhskaya, L. N. Efimova, O. Shilova","doi":"10.30791/1028-978x-2022-7-25-34","DOIUrl":"https://doi.org/10.30791/1028-978x-2022-7-25-34","url":null,"abstract":"Nanodispersed xerogels and powders (average size 9 nm) were obtained by co-precipitation of hydroxides in the ZrO2–Y2O3–Al2O3. Solid-state sintering of samples from the initial [(ZrO2)0,97(Y2O3)0,03]0,8(Al2O3)0,2 powder with pore-forming additives using a patented technology strong highly porous ceramics was produced. Dopplerography was used to assess the volume of blood flow in arterioles and capillaries on 150 and 250 days after implantation of the plates. Thus, microcirculatory Doppler sonography seems to be a promising intravital method for assessing blood flow in the plate location area and, possibly, inside the plate. It was found that ceramic plates based on zirconium dioxide, placed in the body of experimental animals, do not cause a negative reaction of the animal’s body. The results of studies under in vivo conditions suggest that the obtained bioceramic based on zirconium dioxide is promising for use as a material for endo-prosthetics.","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":"85585321","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":"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}

{"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}

{"title":"Effect of electron-beam treatments on the level and evolution of residual stresses in the “surface Ti – Ni – Ta – Si alloy/TiNi-substrate” system","authors":"M. Ostapenko, V. Semin, A. A. Neiman, F. D’yachenko, L. Meisner","doi":"10.30791/1028-978x-2022-12-43-56","DOIUrl":"https://doi.org/10.30791/1028-978x-2022-12-43-56","url":null,"abstract":"TiNi shape memory alloys exhibiting martensitic transformations are attractive materials in the industry of micromechanical systems. The key issue responsible for degradation of functional properties of TiNi during operation is residual stresses arising from the sample processing and surface treatments. In this work, we investigated TiNi substrates modified after synthesis of Ti – Ni – Ta – Si surface alloys (SA) by additive thin film electron-beam (ATF-EB) method. The effect of electron-beam treatments of the system “[Ti – Ni – Ta – Si]SA/TiNi substrate” at the energy density (ES = 1.7 J/cm2) and pulse number n = 10 on the elastic-stress state of the B2 phase in TiNi substrate has been studied. Detailed analysis by X-ray diffraction (XRD) and transmission electron microscopy (TEM) has shown the formation of two isostructured B2 phases with different lattice parameters, chemical composition, and microstructure. It has been found that changes in the B2 lattice parameters are closely related to the variation of the chemical composition and residual elastic stresses of the first kind. The study of residual stresses in the samples reveals that compression stresses in the direction perpendicular to the irradiated surface reach a value of –350 MPa. After additional electron-beam treatment, the compression stress value decreases to –270 MPa.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77893444","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":"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}

{"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}

{"title":"Features of oxidation of copper-nickel alloys synthesized by spark plasma sintering","authors":"N. P. Burkovskaya, N. V. Sevostyanov, F. N. Karachevtsev, P. Medvedev","doi":"10.30791/1028-978x-2022-7-49-57","DOIUrl":"https://doi.org/10.30791/1028-978x-2022-7-49-57","url":null,"abstract":"Data on high-temperature tests for heat resistance of copper-nickel-based powder materials synthesized by spark plasma sintering (SPS) are presents. The features of oxidation of copper-nickel alloys with various alloying elements at temperatures above 1000 °C have been studied. Based on the research results, the dependence of the growth rate of the oxide film on the high-temperature oxidation temperature was established, and the influence of alloying elements in the composition of sintered copper-nickel alloys on their heat resistance was considered. It is shown that the highest heat resistance is provided by alloying copper-nickel alloys with aluminum and chromium. For all considered compositions of copper-nickel alloys synthesized by spark plasma sintering, the temperature point of 1100 °C during a 20-hour heat resistance test is the limiting one, since most of the samples are completely destroyed. The scale growth rate for composition Cu – Ni – Cr – Al 1.49·10–3 g/cm3 is lower than the oxidation rate of pure nickel 3.78·10–3 g/cm3 at 1000 °C and these two samples demonstrate the lowest weight gain after testing at 1000 °С. For compositions Cu – Ni, Cu – Ni – Cr – C(graphite) and Cu – Ni – Al the oxidation rate increases by two orders of magnitude, for compositions Cu – Ni – Cr and Cu – Ni – Cr – Si — by three orders of magnitude. Despite increase of test temperature up to 1100 °C, the rate of scale growth on the surface of Cu – Ni – Cr and Cu – Ni – Al specimens remain practically unchanged: 124.01·10–3 and 210.43·10–3 g/cm3 at 1000 °C; 153.44·10–3 and 203.87·10–3 g/cm3 at 1100 °C. Deceleration of the oxidation kinetics of these samples with temperature increase is ensured by formation of oxide film on the surface, which has a dense structure with good adhesion to the basic material.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86589676","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":"Influence of the power supply mode of leds on the resistance to exposure to gamma quants","authors":"A. Gradoboev, K. N. Orlova, V. V. Sednev, F. Zhamaldinov","doi":"10.30791/1028-978x-2022-7-5-13","DOIUrl":"https://doi.org/10.30791/1028-978x-2022-7-5-13","url":null,"abstract":"The paper presents results of a study of the influence of active and passive power modes on the resistance to gamma-quantum irradiation of the LED manufactured on the basis of AlGaAs multilayer heterostructures. Three characteristic stages of radiation power reduction are distinguished for the studied LEDs irrespective of irradiation supply mode. In this case, the second stage is described by a higher damage factor and the third stage is distinguished by the appearance of catastrophic failures. Two differently directed processes of radiation power variation are observed during the irradiation of LED in active modes. It is supposed that the first process is caused by the power reduction of LED emission due to the injection of the corresponding radiation defects. The second process is caused by a partial recovery of the emission power due to radiation, radiation-thermal, and/or electrostimulated annealing of a portion of the defects created. The observed recovery of the radiation power in the active supply mode of the LEDs during irradiation significantly increases their resistance to gamma-quantum irradiation.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82427637","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":"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}