Inorganic Materials最新文献

{"title":"Improvement of the Method of Digital Image Correlation in the Field of Analyzing the Processes of Deformation and Fracture of Composites","authors":"E. M. Strungar’,&nbsp;D. S. Lobanov,&nbsp;O. A. Staroverov,&nbsp;K. A. Pelenev","doi":"10.1134/S0020168525700669","DOIUrl":"10.1134/S0020168525700669","url":null,"abstract":"<p>This paper reflects new experimental results that describe the processes of deformation and fracture of composites with significant structural heterogeneity with concentrators. A large-scale approach to the development of the method of digital image correlation (DIC) under complex modes of external influences is proposed. A number of methods of fixation of recorded data under cyclic impacts are considered. The peculiarities of each of the presented methods of data fixation depending on the main purpose of the research on the basis of static and cyclic tests of carbon fiber reinforced plastic specimens are outlined. Recommendations on the use of the “analog capture” and “flex capture” options of the “Vic Snap” program are presented. The recommendations are valid for solving problems related to the analysis of regularities of deformation and fracture of objects with structural heterogeneity made of polymer composite materials under different modes of external loading. This study reflects the main methodological peculiarities that occur when working with the VIC-3D noncontact optical video system and the method of correlation of digital images on polymer composite materials. Deformations at the structural and macroscopic levels are compared. Recommendations on the selection of post-treatment parameters, namely, the step in the calculation by the DIC method, are proposed. A method of reducing the edge effect during uniaxial tensile testing of specimens with a concentrator is proposed. As a result of these studies, it becomes possible to obtain new experimental data on the processes of defect development and macroscopic fracture zones in the hole region, while avoiding the influence of the edge zone.</p>","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"61 1-6","pages":"204 - 211"},"PeriodicalIF":0.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evolution of Strains and Damages at Cyclic Elastoplastic Deformation with Exposures and Imposition of Additional Load Pulsations on Them","authors":"M. M. Gadenin","doi":"10.1134/S0020168525700748","DOIUrl":"10.1134/S0020168525700748","url":null,"abstract":"<p>The process of cyclic elastoplastic loading is noted to be characterized by a deformation diagram in stress–strain coordinates. The appearance of this diagram generally depends on the level of acting stresses and strains, the loading mode and conditions, and the type of structural material. One of the fundamental problems in deformation and fracture mechanics, the solution of which makes it possible to formulate basic equations describing the conditions for reaching limit states based on damage accumulation criteria, is the establishment of patterns in the kinetics of deformations during cyclic elastoplastic deformation, which directly form the basic parameters of the deformation criteria for low-cycle fracture. Based on the results of the experimental studies, it has been shown that, in the presence of exposure cycles at load extremes and the imposition of variable stresses on these exposures, in comparison with regular cyclic loading with equal stress amplitudes, additional deformations occur due to the development of creep processes. These deformations largely determine the increase in the range of cyclic plastic deformation in each loading cycle and also stimulate an increase in the range of elastoplastic deformation from active cyclic deformation. Furthermore, the presence of exposures at stress extremes without the imposition of additional alternating stresses has the greatest impact on the increase in plastic strain amplitudes during cycles. The imposition of additional alternating stresses during exposures also increases creep strain values, but this is more pronounced under lower-frequency loads than under dynamic application. The increase in cyclic plastic deformation during cycles with exposure periods and the imposition of additional alternating stresses during their course causes a reduction in low-cycle fatigue life compared to regular loading without exposure periods, with equal stress amplitudes, and, to a greater extent, the higher the strain values from static and dynamic creep. The increase in the range of cyclic plastic deformation due to the progression of additional plastic creep deformation during the exposure time according to the strain-kinetic criterion increases the damageability of the material during cyclic elastoplastic deformation, which causes a decrease in cyclic durability.</p>","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"61 1-6","pages":"279 - 287"},"PeriodicalIF":0.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rapid Estimation of the Fatigue Limit of Polymer Composite Materials Using Infrared Thermography","authors":"D. G. Solomonov,&nbsp;M. Sh. Nikhamkin","doi":"10.1134/S0020168525700694","DOIUrl":"10.1134/S0020168525700694","url":null,"abstract":"<p>To ensure the reliability of structural elements made of polymer composite materials operating under vibration conditions, it is necessary to have data on their resistance to destruction due to high-cycle fatigue. The traditional approach to determining the fatigue strength characteristics of materials involves long-term expensive tests. The infrared thermography method for express estimation of the fatigue limit has actively been developed in recent years. The method is based on the use of self-heating of the material under cyclic loads exceeding the fatigue limit. This study is aimed at developing, within the framework of the infrared thermography method, a technique for experimental rapid estimate of the fatigue limit of polymer composite materials using the example of laminated carbon fiber plastics, substantiation of the selection of controlled parameters of the thermal state of samples and processing of the results. Standard samples of carbon fiber were subjected to block cyclic loading in the tension–tension cycle using an electroresonance testing machine. During loading, the surface temperature of the samples was recorded using a precision infrared camera. Four variants of processing the test results have been compared. The first two options are based on the use of the maximum and averaged stabilization temperature over the sample surface in the loading blocks. The third and fourth options have been based on the use of the increase of the maximum and averaged temperature at the beginning of the loading block. The estimates of the fatigue limit obtained by the above four variants of the thermogram processing method agreed with each other and with the results of standard fatigue tests. The use of the infrared thermography method made it possible to significantly reduce the number of tested samples, as well as the labor intensity and duration of tests compared with standard fatigue tests. This makes it possible recommend the described methodology for obtaining an express estimation of the fatigue limit at the stage of development of products made of composite materials when selecting design and technological solutions.</p>","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"61 1-6","pages":"228 - 235"},"PeriodicalIF":0.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cyclic Viscoelasticity of Polymethyl Methacrylate","authors":"A. S. Kurkin,&nbsp;A. S. Kiselev","doi":"10.1134/S0020168525700773","DOIUrl":"10.1134/S0020168525700773","url":null,"abstract":"<p>This paper presents our results on the creep of polymethyl methacrylate (PMMA) under cyclic load. We have analyzed the viscoelastic behavior of PMMA under normal operating conditions, before damage to the material. Creep during continuous deformation is a combination of two processes: creep acceleration due to a rise in stress and creep deceleration over time. In the case of an instantaneous rise in load, only the former process is operative; during holding under constant load, only the latter. For both processes, we have derived equations of viscoelastic state which relate the viscous strain acceleration to the elastic and viscous strain rates and the current elastic strain level. The equations are applicable in the stress range from the creep limit to the forced elasticity limit and in the case of recovery after complete unloading. Since the equations do not include time or accumulated viscous strain in explicit form, they can be used in the case of a process with an arbitrary law of the rise in strain or stress. Using results obtained in cyclic tests at various strain rates in the loading and unloading stages, we have derived equations of state for various combinations of the magnitude and sign of the elastic and viscous strain rates. The equations have been used to model viscous deformation of PMMA according to a preset law of the variation in elastic strain. Comparison with experimental data has confirmed high modeling accuracy. We have identified a number of successive stages of viscoelastic deformation in relation to the stress level: elastic (at stresses below the creep limit), instantaneously viscous, viscous, and viscoplastic stages. The viscous strain does not rise in the first stage, rises only with increasing load in the second stage, and rises during holding as well in the third stage. The viscoplastic stage corresponds to accumulation of irreversible strain, which persists after recovery.</p>","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"61 1-6","pages":"312 - 325"},"PeriodicalIF":0.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Total Reflection X-Ray Fluorescence Study of Strontium Substitution for Lanthanum in Lanthanum Ferrites for Gas Sensors","authors":"D. G. Filatova,&nbsp;V. B. Platonov,&nbsp;N. M. Malinin,&nbsp;A. A. Troitskiy,&nbsp;M. N. Rumyantseva","doi":"10.1134/S0020168525700542","DOIUrl":"10.1134/S0020168525700542","url":null,"abstract":"<p>We have developed an approach for joint determination of La, Fe, and Sr in solutions and suspensions of (La,Sr)FeO₃ composites by total reflection X-ray fluorescence (TXRF) spectroscopy with the aim of assessing the effect of strontium substitution for lanthanum on the gas-sensing properties of lanthanum ferrites. A gallium solution with a concentration of 50 mg/L was used as an internal standard for determination of the constituent elements. The adequacy of the results obtained was ascertained using inductively coupled plasma atomic emission spectroscopy (ICP AES) of solutions of the samples. According to the data we obtained, there were no interelement effects when La, Fe, and Sr were present together in solution. The reproducibility of the TXRF determination results (<i>S</i>_r) was 0.04, 0.05, and 0.06 for La, Fe, and Sr, respectively. The reproducibility of the results for the suspensions was due to the small particle size (15–17 nm) and the uniform distribution of the internal standard in the aliquot in the sample preparation procedure chosen. All of the materials were shown to consist of a single phase, corresponding to pure lanthanum ferrite with an orthorhombic crystal lattice (ICDD card no. 37-1493). The absence of unindexed reflections in their X-ray diffraction patterns points to successful incorporation of Sr²⁺ cations into the La³⁺ site. Doping of lanthanum ferrite with strontium was shown to improve the sensitivity of the materials to CO, NH₃, methanol, and acetone and reduce the optimal working temperature of the sensor by 50–150°C. The best gas-sensing properties were offered by the lanthanum ferrite nanofiber containing the lowest Sr concentration (0.01 at %). At the same time, the insensitivity of the materials to methane and benzene is the result of the higher stability of their molecules to acid–base active surface centers of La_1–<i>x</i>Me_<i>x</i>FeO₃.</p>","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"61 1-6","pages":"26 - 31"},"PeriodicalIF":0.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative Evaluation of Methods of Gas Chromatographic Determination of Hydrogen Used for Production of Isopropyl Alcohol","authors":"V. O. Vetrenko,&nbsp;O. A. Golovanova,&nbsp;N. I. Buchatskaya","doi":"10.1134/S0020168525700529","DOIUrl":"10.1134/S0020168525700529","url":null,"abstract":"<p>During the synthesis of isopropyl alcohol by hydrogenation of acetone it is necessary to monitor the contents of trace impurities in the hydrogen, since its purity determines product quality, and CO and CO₂ impurities act as catalytic poisons for this reaction. At the Omsk Kauchuk plant, hydrogen purity is determined by gas chromatography using two different chromatographs: a laboratory unit and an online unit. A comparison of parallel determinations of hydrogen concentration revealed a discrepancy on the order of 10 wt %, while the process chromatograph did not detect CO and CO₂ impurities that the laboratory chromatograph measured at 0.10 and 0.016 wt %, respectively; the nitrogen content was also substantially underestimated. Based on the study, it was established that the packing sorbent of the packed column of process chromatograph is unsuitable for determining CO₂, which distorts the hydrogen measurement results. Accordingly, alternative packed columns containing a sorbent selective for CO₂ were proposed for use with the process chromatograph and the column should be periodically heated to remove volatile contaminants.</p>","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"61 1-6","pages":"17 - 21"},"PeriodicalIF":0.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Spectral Analysis of the State Parameters of Technical Systems in the Regular and Damaged States","authors":"N. A. Makhutov,&nbsp;M. M. Gadenin","doi":"10.1134/S0020168525700657","DOIUrl":"10.1134/S0020168525700657","url":null,"abstract":"<p>It is noted that the reaction of bearing elements of structures and engineering components to service loadings, impacts of physical fields, and corrosive environments is the initiation of not only fields of stresses and strains but also fields of damages. At the same time, depending on states of loading and environment, various mechanisms of accumulation of damages and fracture are realized, whose indicators are essential changes in spectra of a response of technical systems to different impacts. The analysis of parameters of a state of such systems by registration of spectral characteristics of service processes allows one to carry out estimations of levels of their damage in a rather full degree. On the basis of results of research of service states of technical systems on spectral diagnostic parameters, approaches to the analysis of amplitude-frequency characteristics of their actual states both in the regular allowed states and upon transition to dangerous states owing to accumulation in them of dangerous service damages are offered. At the same time, criteria of transition of technical systems from regular to emergency and catastrophic states at accumulation of critical limits of damage are formulated. Examples of the dispersed initiation of microcracks in material of structural parts at a cyclic deformation with their propagation in the main fractures and also examples of the analysis of dynamic states on vibration spectra of a response of simple and compound technical systems with the crack which arose in them and with existence of defects are given. At the same time, the possibility of obtaining initial computation and experimental information on parameters of a stress-strain state and damage of installation with use of methods of the spectral analysis of a response of a compound structure to vibration impact as a result of initiation of damage of its separate parts is shown. Results of such spectral analysis can be used for diagnostics and monitoring of states of regular service of high-loaded installations of a technosphere and transition of their states to limit emergency and catastrophic in relation to objects of power engineering, space-rocket, and aircraft equipment.</p>","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"61 1-6","pages":"196 - 203"},"PeriodicalIF":0.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of Low-Energy Accelerated Electrons on Structural Characteristics of Unsaturated Fatty Acids Studied by High-Resolution Liquid Chromatography–Mass Spectrometry","authors":"A. V. Brown,&nbsp;V. S. Ipatova,&nbsp;U. A. Bliznyuk,&nbsp;P. Yu. Borshchegovskaya,&nbsp;A. P. Chernyaev,&nbsp;I. A. Ananyeva,&nbsp;I. A. Rodin","doi":"10.1134/S0020168525700566","DOIUrl":"10.1134/S0020168525700566","url":null,"abstract":"<p>An approach has been proposed for assessing the effect of exposure to a low-energy electron beam on structural characteristics of a number of unsaturated fatty acids present in fish oil—oleic, linoleic, arachidonic, eicosapentaenoic, and docosahexaenoic acids—with the use of high-resolution liquid chromatography–mass spectrometry. The subject of this study was commercially available fish oil containing omega-3 and omega-6 polyunsaturated fatty acids. Samples were irradiated with 1-MeV electrons at the UELR-1-25-T-001 accelerator to doses of 0.25, 0.5, 1, 5, and 8 kGy at a dose rate of 10 Gy/s and average beam current of 0.5 μA. The structural integrity of the unsaturated fatty acids chosen was analyzed by high-performance liquid chromatography–tandem mass spectrometry (HPLC–MS/MS). The percentage of intact molecules of the unsaturated fatty acids was evaluated by comparing the peak areas of the analytes in an irradiated solution and unirradiated (control) sample. Taking into account optimization of detection conditions, we calculated the detection limit for each acid and distinguished two possibilities of identifying the presence of unsaturated fatty acids in a sample: reliably detected or not detected. Using the proposed approach, irradiation with low-energy accelerated electrons to doses between 0.25 and 8 kGy at a dose rate of 10 Gy/s has been shown to reduce the concentration of two omega-3 fatty acids—eicosapentaenoic and docosahexaenoic—in aqueous samples.</p>","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"61 1-6","pages":"37 - 45"},"PeriodicalIF":0.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimation of the Dislocation Density on GaAs Wafers Using Machine Vision","authors":"R. A. Verbitsky,&nbsp;V. D. Latonov,&nbsp;Yu. V. Syrov,&nbsp;S. N. Knyazev","doi":"10.1134/S0020168525700475","DOIUrl":"10.1134/S0020168525700475","url":null,"abstract":"<p>We report results of applying artificial intelligence (AI) and machine vision technologies for detection of surface defects. We analyzed a {100} crystallographic surface of single-crystal GaAs grown by the liquid encapsulated Czochralski method. The YOLOv8 open architecture was used to train a neural network for recognition of pits produced by selective etching of single-crystal GaAs wafers, and we proposed a solution for automating dislocation density counting using observed selective etching pits. For processing by the neural network, we used monochrome images. The data array in the training stage consisted of about 40 000 objects. The average density of etch pits (detection objects) was determined to be (3–7) × 10⁴ cm^–2. In the case of training on a sufficient amount of data, AI and machine vision algorithms are capable of recognizing target objects, including overlapping ones, with high reliability. Counting all etch pits (on the entire wafer surface) and subsequent software processing of results allowed us to obtain a dislocation etch pit density distribution map and etch pit density contour lines, with reference to the absolute density value. The use of the complete count method with AI and machine vision technologies, in comparison with conventional averaging methods for analysis of structural uniformity of single-crystal GaAs, has been shown to be justified and reasonable. The results of this study can be used for technological monitoring of dislocation density and gaining insight into general trends in the variation of the dislocation structure of single-crystal GaAs in relation to conditions of ingot growth and post-growth treatment of the ingots.</p>","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"61 1-6","pages":"132 - 137"},"PeriodicalIF":0.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Properties of the Bi2Co1/3Cu1/3Ni1/3Nb2O9+Δ Mixed-Cation Pyrochlore Oxide","authors":"A. P. Petrakov,&nbsp;K. A. Badanina,&nbsp;A. A. Selyutin,&nbsp;A. V. Koroleva,&nbsp;S. V. Nekipelov,&nbsp;B. A. Makeev,&nbsp;N. A. Zhuk","doi":"10.1134/S0020168525700451","DOIUrl":"10.1134/S0020168525700451","url":null,"abstract":"<p>Singly doped bismuth-containing pyrochlores have potentially attractive photocatalytic and dielectric properties. Here we report the properties of a multielement pyrochlore phase containing equimolar amounts of 3<i>d</i> transition metals. The mixed-cation pyrochlore oxide with the composition Bi₂Co_1/3Cu_1/3Ni_1/3Nb₂O_9+Δ (sp. gr. <i>Fd</i><span>(overline 3 )</span><i>m</i>, <i>a</i> = 10.5378 ± 6 Å) was synthesized by solid-state reaction. The chemical state of the transition metal cations in the pyrochlore oxide was determined by X-ray photoelectron spectroscopy (XPS). Parameters of the Bi 5<i>d</i>, Nb 3<i>d</i>, Co 2<i>p</i>, Ni 2<i>p</i>, and Cu 2<i>p</i> XPS spectra of the mixed-cation pyrochlore phase were compared to those of transition metal oxides. By analyzing the relative intensity of peaks in the Cu 2<i>p</i> spectrum, we evaluated the fractions of Cu(I) and Cu(II) cations. The Bi 4<i>f</i> and Nb 3<i>d</i> spectra of the mixed-cation pyrochlore phase have been shown to be shifted to lower energies by 0.25 and 0.65 eV, respectively. The band gap of the pyrochlore phase for the strongest direct allowed electronic transition is 1.1 eV. The results of this study can be used for improving the technology of multilayer ceramic capacitors and microwave dielectric materials.</p>","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"61 1-6","pages":"156 - 161"},"PeriodicalIF":0.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}