Crystallography Reports最新文献_第4页

Tuning of CsSNi3 Crystal Structure for Thin-film Energy Conversion Devices 薄膜能量转换器件中CsSNi3晶体结构的调谐

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2025-04-30 DOI: 10.1134/S106377452560005X

L. O. Luchnikov, A. A. Zarudnyaa, G. V. Segal, A. S. Ivanova, A. P. Morozov, P. A. Gostishchev, D. S. Saranin

{"title":"Tuning of CsSNi3 Crystal Structure for Thin-film Energy Conversion Devices","authors":"L. O. Luchnikov, A. A. Zarudnyaa, G. V. Segal, A. S. Ivanova, A. P. Morozov, P. A. Gostishchev, D. S. Saranin","doi":"10.1134/S106377452560005X","DOIUrl":"10.1134/S106377452560005X","url":null,"abstract":"Solution-processed CsSnI3-based perovskite thin films with partial MA (methyl amine) substitution were fabricated and assessed for structural, morphological, and transport properties both as-prepared and after 48 h of air exposure. X-ray diffraction revealed that MA0.2Cs0.8SnI3 retained the black-γ perovskite phase despite morphological changes, whereas CsSnI3 showed notable decomposition. Device analyses in p–n diode architectures indicated significantly lower dark current and enhanced shunt resistance for MA-modified films. In unipolar p–n–p devices, a slight threshold voltage reduction and stable trap concentrations (1014 cm–3) suggest improved Fermi level pinning and mild doping compensation. Transient photocurrent measurements confirmed negligible capacitive or inductive impacts, underscoring improved inter-grain connectivity and moderated donor-acceptor defects. Overall, partial MA substitution mitigates oxidation-driven phase transitions in CsSnI3, offering stable microcrystalline perovskites with reduced leakage currents and superior charge transport–key for advancing tin-based perovskite device performance.","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"69 1 supplement","pages":"S98 - S104"},"PeriodicalIF":0.6,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892766","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}

引用次数: 0

Influence of Rolling and Annealing on the Structure and Properties of the Medium-Entropy Ti40Hf5Zr5Ni40Cu5Co5 Shape Memory Alloys 轧制和退火对中熵Ti40Hf5Zr5Ni40Cu5Co5形状记忆合金组织和性能的影响

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2025-04-30 DOI: 10.1134/S106377452460279X

N. N. Resnina, S. P. Belyaev, A. I. Bazlov, R. M. Bikbaev, V. D. Kalganov

{"title":"Influence of Rolling and Annealing on the Structure and Properties of the Medium-Entropy Ti40Hf5Zr5Ni40Cu5Co5 Shape Memory Alloys","authors":"N. N. Resnina, S. P. Belyaev, A. I. Bazlov, R. M. Bikbaev, V. D. Kalganov","doi":"10.1134/S106377452460279X","DOIUrl":"10.1134/S106377452460279X","url":null,"abstract":"The influence of the hot rolling and heat treatment on the structure, martensitic transformations, and mechanical behaviour of the medium-entropy Ti40Hf5Zr5Ni40Cu5Co5 shape memory alloy has been investigated. The results obtained showed that, after hot rolling at 900°С, the alloy does not undergo martensitic transformations, which is caused by the high dislocation density. Heating to 500°С is accompanied by heat release at temperatures of 257–323°С. The martensitic transformations are restored; however, they are observed in a wide temperature range, which is typical of ultra-fine grain materials. Holding the sample at 500°С for 1 h leads to grain growth; however, the grain size remains less than 1 μm. This circumstance reduces the temperature ranges of martensitic transformations and increases the dislocation yield limit, as compared to the initial state (before hot rolling). Annealing at 700°С for 1 h is accompanied by grain growth to 3.5 μm, which leads to additional decrease in the temperature ranges of the transformations, increase in hysteresis, and decrease in the yield limit for dislocation slip. The strength and strain up to failure increase as compared to the values found in the sample after annealing at 500°С for 1 h.","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"69 1 supplement","pages":"S61 - S65"},"PeriodicalIF":0.6,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892776","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}

引用次数: 0

Anisotropy in the Mechanical Behaviour of the Low-carbon Steel Wall Produced by Wire Arc Additive Manufacturing without or Under Ultrasonic Assistance 无超声或超声辅助下电弧增材制造低碳钢壁力学行为的各向异性

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2025-04-30 DOI: 10.1134/S1063774525600139

S. P. Belyaev, V. V. Rubanik, V. V. Rubanik Jr., N. N. Resnina, A. V. Sibirev, R. M. Bikbaev, A. M. Ivanov, I. V. Ponikarova, D. P. Draba

引用次数: 0

Orientation Dependence of the Two-Way Shape Memory Effect in Single Crystals of Co35Ni35Al28Fe2 Alloy Co35Ni35Al28Fe2合金单晶双向形状记忆效应的取向依赖性

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2025-04-30 DOI: 10.1134/S1063774525600073

A. S. Eftifeeva, I. D. Fatkullin, E. Yu. Panchenko, E. I. Yanushonite, M. V. Zherdeva, Yu. I. Chumlyakov

引用次数: 0

Morphological Features of Graphene in Al2O3/G Nanocomposite 石墨烯在Al2O3/G纳米复合材料中的形态特征

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2025-04-30 DOI: 10.1134/S1063774524602880

V. V. Stolyarov

引用次数: 0

Influence of the Volume Fraction of the Martensite Formed on Cooling under Stress on the Martensite Stabilization Effect in the NiTi Alloys 应力冷却形成的马氏体体积分数对NiTi合金马氏体稳定效应的影响

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2025-04-30 DOI: 10.1134/S1063774525600115

S. P. Belyaev, N. N. Resnina, I. V. Ponikarova, V. A. Andreev

引用次数: 0

Comparison of Methods for Obtaining Graphene Structures 制备石墨烯结构的方法比较

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2025-04-30 DOI: 10.1134/S1063774525600152

S. B. Nechushkin, A. I. Ril’, A. V. Timofeev, M. V. Chichkov, M. A. Sitnov, V. V. Kozlov

{"title":"Comparison of Methods for Obtaining Graphene Structures","authors":"S. B. Nechushkin, A. I. Ril’, A. V. Timofeev, M. V. Chichkov, M. A. Sitnov, V. V. Kozlov","doi":"10.1134/S1063774525600152","DOIUrl":"10.1134/S1063774525600152","url":null,"abstract":"Three methods for obtaining graphene structures have been investigated: ultrasonic liquid-phase exfoliation (20–60 min), mechanical treatment in a vibratory cup mill, and Hammer’s method. An ultrasonic processing in a polyacrylonitrile/dimethylformamide solution led to a decrease in the particle size from 25.3 to 9.57 µm; the fraction of (5–20)-µm particles reached 68%, and the fraction of particles smaller than 1 µm was 2.69%. According to the atomic force microscopy data, the layer height reduced from 1.1 µm to 100 nm, and the fraction of large aggregates (>100 µm) decreased from 40 to 10%. Mechanical exfoliation with polyacrylonitrile increased the interlayer spacing to 3.609 Å in comparison with 3.373–3.376 Å, a value obtained by ultrasonic treatment. Hammer’s method demonstrated the best exfoliation (according to the X-ray diffraction and Raman spectroscopy data): ID/IG = 1, I2D/IG = 0.07, ({{I}_{{left( {D + D'} right)}}})/IG = 0.12. Molecular modeling revealed a decrease in the specific energy of the system from 351.68 to 200.21 J/g with an increase in the C : O ratio from 38 : 1 to 111 : 1, reaching a minimum of 10.780 J/g for pure graphene.","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"69 1 supplement","pages":"S31 - S37"},"PeriodicalIF":0.6,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892780","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}

引用次数: 0

Effect of CoFe and Co‒Fe‒B Metal Nanogranules in Composite Memristors Based on the LiNbO3 Matrix on Its Structural Features 基于LiNbO3基质的复合忆阻器中CoFe和Co-Fe-B金属纳米颗粒对其结构特性的影响

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2025-04-30 DOI: 10.1134/S1063774524603009

K. Yu. Chernoglazov, E. V. Khramov, A. V. Sitnikov, V. A. Demin, V. V. Rylkov, M. V. Kovalchuk

{"title":"Effect of CoFe and Co‒Fe‒B Metal Nanogranules in Composite Memristors Based on the LiNbO3 Matrix on Its Structural Features","authors":"K. Yu. Chernoglazov, E. V. Khramov, A. V. Sitnikov, V. A. Demin, V. V. Rylkov, M. V. Kovalchuk","doi":"10.1134/S1063774524603009","DOIUrl":"10.1134/S1063774524603009","url":null,"abstract":"The structural features of an insulating Li‒Nb‒O film and (Co–Fe–B)х(LiNbO(_{{3-y}}))(_{{100-x}}) and (Co–Fe)х(LiNbO(_{{3-y}}))(_{{100-x}}) (x ≈ 15–30 at %) nanocomposite samples obtained by ion-beam sputtering of a polycrystalline LiNbO3 target and Co40Fe40B20–LiNbO3 and CoFe–LiNbO3 composite targets, respectively, onto polyimide substrates have been subjected to the Nb K-edge X-ray absorption near-edge spectroscopy (XANES) comparative analysis. It is shown that the structure of local bonds of Nb atoms in the film samples is noticeably different from those in crystalline LiNbO3: the Nb–Nb distance shifts by ~0.9 Å towards lower values, indicating partial reduction of Nb in the form of nanoparticles and the multiphase nature of the system. In the (Co–Fe)х(LiNbO(_{{3-y}}))(_{{100-x}}) sample, the environment (bonds) of Nb atoms is independent of x; the insulating matrix has in this case a structure most similar to LiNbO3. Meanwhile, in the (Co–Fe–B)х(LiNbO(_{{3-y}}))(_{{100-x}}) sample, consistent changes in the XANES spectra have been observed with increasing х, which indicates a significant local restructuring in the sample. The structural features of the samples have been explained by the catalytic effect of the metallic phase of the nanocomposite on the formation of the insulating matrix during its growth.","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"69 1 supplement","pages":"S17 - S22"},"PeriodicalIF":0.6,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892781","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}

引用次数: 0

Spark Plasma Sintering of SiC: Influence of TiC Additive SiC放电等离子烧结：TiC添加剂的影响

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2025-02-16 DOI: 10.1134/S106377452460248X

A. Sh. Asvarov, A. K. Akhmedov, P. L. Podkur, V. M. Kanevsky

{"title":"Spark Plasma Sintering of SiC: Influence of TiC Additive","authors":"A. Sh. Asvarov, A. K. Akhmedov, P. L. Podkur, V. M. Kanevsky","doi":"10.1134/S106377452460248X","DOIUrl":"10.1134/S106377452460248X","url":null,"abstract":"The compaction kinetics, phase composition and mechanical characteristics of pure SiC and pure TiC ceramics, as well as SiC–TiC composite ceramics, obtained by spark plasma sintering (SPS), were studied depending on the component content and SPS-modes. It was found that at a fixed pressing pressure (PSPS = 45 MPa) in a given range of temperatures and sintering times (1800 ≤ TSPS ≤ 2000°C and 0 min ≤ tSPS ≤ 10 min), the relative density of sintered ceramics increases with increasing temperature and sintering time and reaches maximum values of 88, 99.9, and 96.2 of the calculated value for SiC, TiC, and SiC + TiC(10 wt %), respectively. It is shown that sintering of composite ceramics in the SiC–TiC system occurs through the formation and subsequent high-temperature decomposition of intermediate phases of binary carbides. It is demonstrated that the microhardness of SiC–TiC composite samples is determined as an additive value between the hardnesses of the included phases SiC (HV = 2948 ± 238 N/mm2) and TiC (HV = 2465 ± 256 N/mm2).","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"69 6","pages":"950 - 954"},"PeriodicalIF":0.6,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423375","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}

引用次数: 0

Features of the Ga2O3 Layers Synthesized on Silicon by Molecular Layering 分子分层法在硅表面合成Ga2O3层的特性

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2025-02-16 DOI: 10.1134/S1063774524602107

A. V. Drozd, V. A. Dmitriev, I. E. Gabis, V. A. Moshnikov, A. P. Baraban

引用次数: 0