Perspektivnye Materialy最新文献_第2页

Preparation, structure and properties of digoride’s solid solutions (Hf1 – хTaх)B2 地高利酯固溶体(Hf1 - хTaх)B2的制备、结构和性质

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-1-55-65

V. V. Kurbatkina, E. Patsera, T. Sviridova, P. Loginov, D. Sidorenko, A. S. Kolva, E. Levashov

{"title":"Preparation, structure and properties of digoride’s solid solutions (Hf1 – хTaх)B2","authors":"V. V. Kurbatkina, E. Patsera, T. Sviridova, P. Loginov, D. Sidorenko, A. S. Kolva, E. Levashov","doi":"10.30791/1028-978x-2023-1-55-65","DOIUrl":"https://doi.org/10.30791/1028-978x-2023-1-55-65","url":null,"abstract":"Porous sinters of solid solutions were obtained from the elements by the SHS method and then crushed in a ball mill to a fraction of d50 < 10 µm. Single-phase (Hf1 – хTах)B2 solid solutions with a wide range of compositions were obtained by a hot pressing. Detailed investigations of structure and properties were carried out. The plotted lattice parameters vs. solid solution stoichiometry diagrams confirmed the Vegard’s law. SEM, TEM, and EDX structural analysis demonstrated the existence of a HfВ2 – TaB2 single-phase solution region. The structure of samples (lamellas) of (Hf0.8Ta0.2)B2 and (Hf0.6Ta0.4)B2 solid solutions was analyzed by TEM. It has been established that with an increase in the content of tantalum, the size of subgrains decreases to 0.2 – 1 µm. This correlates with the CSR size determined by the X-ray diffraction method. Studies of mechanical properties of single-phase solid solutions have shown that (Hf0.8Ta0.2)B2 and (Hf0.6Ta0.4)B2 possessed extremely high hardness of 63–70 GPa and elastic modulus of 550 – 587 GPa. Electrical resistance dependence on temperature was investigated, values of heat capacity, thermal diffusivity and thermal conductivity coefficients were determined in a wide range of (Hf 1 – xTax)B2 solid solution compositions.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87784225","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 weldability of semi-products from an alloy of the Al – Mg – Si – Cu system Al - Mg - Si - Cu系合金半成品的可焊性研究

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-3-5-13

Y. S. Oglodkova, K. V. Antipov, M. Panteleev, A. Rudchenko

{"title":"Study of weldability of semi-products from an alloy of the Al – Mg – Si – Cu system","authors":"Y. S. Oglodkova, K. V. Antipov, M. Panteleev, A. Rudchenko","doi":"10.30791/1028-978x-2023-3-5-13","DOIUrl":"https://doi.org/10.30791/1028-978x-2023-3-5-13","url":null,"abstract":"The features of the formation of the microstructure of welded joints of sheets of aluminum alloy V-1381 of the Al – Mg – Si – Cu system, obtained with various parameters of automatic argon-arc welding, were studied. Welding modes were selected that provide a high-quality welded joint and strength at a level not lower than 0.8 of the strength of the base metal. It has been established that welding without filler wire leads to cracking without applying tensile deformation, the use of Sv1221 filler wire compared to SvAMg61 and SvAK5 leads to an increase in the strength characteristics of welded joints by 15 – 20 %. Corrosion resistance of welded joints of sheets from V-1381 alloy was determined. Various experimental modes of laser welding were tested, the microstructure and mechanical properties of welded joints were studied. Parameters have been selected that ensure high quality of welds. The possibility of using laser welding for semi-finished products from alloy V-1381 has been established. The new V-1381 alloy can be recommended for use in aircraft fuselage structural elements, including as an alternative to less corrosion-resistant non-weldable alloys of the D16 type, which will increase the weight efficiency of structures both due to increased strength and through the use of welded joints instead of riveted ones.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87941783","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

Sorption capacity of carbon material based on polymer raw materials with respect to methane 基于高分子原料的碳材料对甲烷的吸附能力

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-3-32-42

A. Memetova, A. Zelenin, N. Memetov, A. Gerasimova, V. Yagubov, R. Stolyarov, N. Chapaksov

{"title":"Sorption capacity of carbon material based on polymer raw materials with respect to methane","authors":"A. Memetova, A. Zelenin, N. Memetov, A. Gerasimova, V. Yagubov, R. Stolyarov, N. Chapaksov","doi":"10.30791/1028-978x-2023-3-32-42","DOIUrl":"https://doi.org/10.30791/1028-978x-2023-3-32-42","url":null,"abstract":"The carbon material was synthesized from polymer raw materials (MC-032). He MC-032 has been characterized by various methods, including N2 adsorption-desorption at 77 K, X-ray diffraction analysis, Fourier transform IR spectroscopy, and Raman spectroscopy. The resulting adsorbent has a well-developed porous structure (SBET = 2722 m2/g; VDFT = 1.08 cm3/g). The adsorption of methane was studied in a wide range of pressures at temperatures above the critical one. The maximum adsorption value is ~ 14 mmol/g at 298.15 K and 100 bar. Experimental data on methane adsorption on MC-032 were analyzed using the Dubinin–Radushkevich adsorption model in the temperature range 298.15 – 323.13 K and pressures up to 100 bar. It has been established that the average relative deviations between the experimental results and the results obtained using the Dubinin-Radushkevich model are less than 4 %. It is shown that the differential molar heats of methane adsorption decrease from ~ 25 to ~ 10 kJ/mol. The calculated characteristic adsorption energies are in the range of 5.88 – 6.21 kJ/mol, which indicates that the process of methane adsorption on MC-032 belongs to physical adsorption. MC-032 carbon material has strong adsorption capacity for methane and has good prospects for controlling methane emissions and reducing greenhouse gases.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86241839","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

Development of production technology and approbation of a new nitrogen- and carbon-containing precursor based on vanadium and aluminum for smelting a V – Al – N – C master alloy 一种新型钒铝含氮碳前驱体熔炼钒铝氮碳中间合金的生产技术开发及批准

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-5-56-65

A. Larionov, D. Taranov, A. N. Rylov, M. Trubachev, S. A. Vohmentsev, M. Ziatdinov, I. R. Manashev, K. Pikulin

{"title":"Development of production technology and approbation of a new nitrogen- and carbon-containing precursor based on vanadium and aluminum for smelting a V – Al – N – C master alloy","authors":"A. Larionov, D. Taranov, A. N. Rylov, M. Trubachev, S. A. Vohmentsev, M. Ziatdinov, I. R. Manashev, K. Pikulin","doi":"10.30791/1028-978x-2023-5-56-65","DOIUrl":"https://doi.org/10.30791/1028-978x-2023-5-56-65","url":null,"abstract":"A technology for obtaining complex nitrogen- and carbon-containing precursor materials V(51 – 43) – Al(30 – 36) – N(13,4 – 16,4) – C(2,7 – 6,0) was developed and tested on an experimental scale by nitriding by the method of self-propagating high-temperature synthesis of mixtures of V(65 – 50) – Al master alloys powders with graphite. The ratio of nitrogen to carbon in precursors can be varied over a wide range — N/C = 5.5 – 2.2. Using X-ray phase analysis, it was found that nitrogen in these materials is in the form of AlN and VN nitrides, and carbon is in the form of V2C, VC and V2Al0.96C1.1 carbides. The possibility of replacing graphite in the charge of out-of-furnace aluminothermal smelting of the V – Al – N – C master alloy with an alternative precursor V(51) – Al(30) – N(15) – C(2.7) has been experimentally confirmed. Using the methods of X-ray phase analysis, electron microscopy, and X-ray spectral microanalysis, it was found that the smelted using this precursor V – Al – N – C master alloy ingot is identical in phase composition and in distribution uniformity of nitride and carbide inclusions to alloy ingots that were smelted using other carbon-containing materials. The content of nitrogen, carbon and oxygen in the ingot meet the requirements of the technical specifications for V – Al – N – C master alloy.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87712102","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

Low-temperature aging of composites on the basis system Al2O3 – [ZrYb]O2 including strontium hexaaluminate 含六铝酸锶Al2O3 - [ZrYb]O2基体系复合材料的低温时效研究

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-1-37-45

L. I. Podzorova, A. Il’icheva, O. I. Pen’kova, V. Sirotinkin, O. Antonova, A. Baikin, G. Kochanov

引用次数: 0

Tribological characteristics of structural alloy steels after laser modification of their surface 结构钢激光表面改性后的摩擦学特性

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-6-67-79

S. Yaresko, A. T. Kozakov, A. V. Sidashov, V. Scherbakov

{"title":"Tribological characteristics of structural alloy steels after laser modification of their surface","authors":"S. Yaresko, A. T. Kozakov, A. V. Sidashov, V. Scherbakov","doi":"10.30791/1028-978x-2023-6-67-79","DOIUrl":"https://doi.org/10.30791/1028-978x-2023-6-67-79","url":null,"abstract":"The microstructure and tribological characteristics of the modified surface of AISI E3310 and AISI A290C1M structural alloy steels after laser treatment using an ytterbium continuous fiber laser have been studied. Laser surface treatment was carried out on air with laser power outputs of 75 W and 100 W and scanning speeds from 2 to 14 mm/s. Metallographic analysis and durometer testing were applied to determine the structure of laser action zones and the steel structural components there. It has been shown that the scanning speed at a laser power of 100 W has the most significant effect on the dimensions of the laser action zones. The maximum depth of the laser action zone during laser treatment without surface melting is 310 and 170 µm for E3310 and A290C1M steel, respectively. Depending on the mode of hardening, the microhardness in the laser action zones varies from 1.36 to 1.97 times for E3310 steel; as for A290C1M steel, it increases by 2.0 – 2.6 times. At 100 µm hardening depth, the reduction in linear wear and wear intensity reaches 26.6 % and 43.9 % for E3310 and A290C1M steel, respectively.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82599689","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

The electrode morphology and surface energy controlling for formation of the ethanol fuel cells based on porous silicon formed by Pd-assisted etching 以pd辅助蚀刻法制备多孔硅为原料制备乙醇燃料电池的电极形态和表面能

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-7-10-22

O. Volovlikova, S. Gavrilov

引用次数: 0

Investigation of pH effect on adsorption properties of the nanostructured graphene-containing composite materials, modified by polyaniline, in the adsorption of various chemical nature pollutants pH值对聚苯胺改性含石墨烯纳米复合材料对多种化学性质污染物吸附性能的影响

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-1-28-36

T. S. Kuznetsova, T. Pasko, A. Burakov, I. Burakova, E. Mkrtchyan, O. A. Ananyeva, A. Tkachev

{"title":"Investigation of pH effect on adsorption properties of the nanostructured graphene-containing composite materials, modified by polyaniline, in the adsorption of various chemical nature pollutants","authors":"T. S. Kuznetsova, T. Pasko, A. Burakov, I. Burakova, E. Mkrtchyan, O. A. Ananyeva, A. Tkachev","doi":"10.30791/1028-978x-2023-1-28-36","DOIUrl":"https://doi.org/10.30791/1028-978x-2023-1-28-36","url":null,"abstract":"Liquid-phase sorption is a multi-stage process, the success of which depends on many factors. One of the key parameters that determines the extraction efficiency is the liquid medium pH value. In this study, the effect of the pH value of model aqueous solutions containing separately heavy metal ions (using zinc and lead ions as an example), as well as organic dyes methylene blue (MB) and sunset yellow (SY), was evaluated. The required pH value was achieved by preparing the solutions in appropriate buffer systems. As a sorbent, a nanostructured composite material was used, represented by a matrix of carbon nanotubes and graphene oxide modified with polyaniline, where phenol-formaldehyde resin acted as a binding agent. Various forms of this material were considered — xerogel, cryogel, aerogel, as well as their carbonized modifications. As a result of experimental studies, it was found that for all used heavy metal ions (zinc and lead) and MB for all sorbents forms, the maximum adsorption capacity was noted at pH = 6. At the anionic dye SY adsorption, the best result was achieved at pH = 2.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74318313","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

Welding of high-nitrogen austenitic steels (Review) 高氮奥氏体钢的焊接(综述)

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-2-5-20

V. S. Kostina, M. Kostina

{"title":"Welding of high-nitrogen austenitic steels (Review)","authors":"V. S. Kostina, M. Kostina","doi":"10.30791/1028-978x-2023-2-5-20","DOIUrl":"https://doi.org/10.30791/1028-978x-2023-2-5-20","url":null,"abstract":"Alloying with nitrogen allows one to substantially increase the strength of steels, especially of the austenitic steels, in which the equilibrium nitrogen content can reach 0.4 – 0.7 wt % depending on their chemical composition. Nitrogen stabilizes austenite and enhances its corrosion and wear resistance. For this reason, nitrogen-containing austenitic steels are advantageous structural materials, in particular, for heavy loaded welded structures. However, wrong choice of the welding method, regime, or filler for high-nitrogen steels can cause critical defects such as pores and cracks in the welded joints and substantially decrease their mechanical properties and corrosion resistance compared to those of the base metal. More than hundred literature sources have been considered for the analysis of welding types and methods for austenitic steels containing ≥ 0.4 wt. % nitrogen, the criteria for their weldability, and the causes for potential negative phenomena occurring upon their welding. For such steels, information is provided on the welding filler materials as well as on the modes and parameters of the welding process (supplied heat, presence/absence of a protective atmosphere, its composition, etc.). The structure, phase composition, and properties of the resulting welded joints are considered. The examples are given on the effect of the subsequent processing of welded joints (heat treatment and thermal deformation processing for the elimination of the resulting distortion) on their basic properties.","PeriodicalId":20003,"journal":{"name":"Perspektivnye Materialy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76233750","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

Research of mechanical properties of unalloyed titanium processed by selective laser melting and rotary swaging 选择性激光熔化和旋转模压非合金钛的力学性能研究

Perspektivnye Materialy Pub Date : 2023-01-01 DOI: 10.30791/1028-978x-2023-7-34-45

M. Gryaznov, S. Shotin, V. Chuvildeev, A. N. Sysoev, D. N. Kotkov, A. Piskunov, N. Sakharov, A. V. Semenycheva, A. Murashov

引用次数: 0