Materials Today Communications最新文献

Exploring the functional properties of Plodia interpunctella silk fibers as a natural biopolymer for biomaterial applications. 探索马间Plodia蚕丝纤维作为天然生物高分子材料的功能特性。

IF 3.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Communications

Pub Date : 2025-01-01 Epub Date: 2024-12-24 DOI: 10.1016/j.mtcomm.2024.111416

Lauren E Eccles, Elizabeth L Aikman, Jasmine B McTyer, Isabel L Matías Cruz, Adelyn L Richgels, Whitney L Stoppel

Renewable and degradable materials, formed using biopolymers as material precursors, are sought after in pharmaceutical, biomedical, and industrial fields. Silk-based biomaterials, primarily derived from the silk fibroin protein of the Bombyx mori (B. mori) silkworm, have advantageous mechanical properties, biocompatibility, and commercial availability. Recent efforts aim to expand the range of achievable silk-based biomaterial properties via alternative sources of silk proteins with different sequences and structures. These structural distinctions drive differences in physical and chemical properties of silk fibers, primarily due to the varying degree of crystallinity in the polymers. For the development of alternative silk-based materials, silk from Plodia interpunctella (P. interpunctella), a small agricultural pest that infests and damages food products via silk production, is evaluated. Early investigations have highlighted differences between P. interpunctella and B. mori silk fibroin proteins, however P. interpunctella silk still largely lacks characterization and optimization on both the silk fiber and bulk material level. This work evaluates the structural, thermal, mechanical, and cell-material properties of non-degummed and degummed P. interpunctella silk as a raw material for biomaterial fabrication and discusses the benefits and limitations of these proteins as new biopolymers. Observed properties are used to identify links between silk fibroin protein sequence and fiber function in addition to forming hypotheses in how P. interpunctella silk-based biomaterials will perform in comparison to other natural biopolymers. Future work aims to develop methods to process P. interpunctella silk into material formats, utilizing the material characteristics determined here as a baseline for shifts in material performance.

以生物聚合物为前体形成的可再生和可降解材料在制药、生物医学和工业领域受到追捧。蚕丝基生物材料主要来源于家蚕的丝素蛋白，具有良好的机械性能、生物相容性和商业可行性。最近的努力旨在通过具有不同序列和结构的丝蛋白的替代来源来扩大可实现的丝基生物材料性能的范围。这些结构上的差异导致了丝纤维的物理和化学性质的差异，这主要是由于聚合物结晶度的不同。为了开发可替代的蚕丝基材料，研究人员评估了一种通过蚕丝生产对食品造成危害的小型农业害虫——间点Plodia interpunctella （P. interpunctella）的蚕丝。早期的研究已经发现了斑马虫和家蚕蚕丝丝素蛋白的差异，但斑马虫蚕丝在纤维和散装材料水平上仍然缺乏表征和优化。本研究评估了未脱胶和脱胶马间假蛛丝作为生物材料制造原料的结构、热、机械和细胞材料特性，并讨论了这些蛋白质作为新型生物聚合物的优点和局限性。观察到的性质被用来确定丝素蛋白序列和纤维功能之间的联系，以及形成关于与其他天然生物聚合物相比，马斑间假单胞菌丝基生物材料将如何表现的假设。未来的工作旨在开发方法，利用这里确定的材料特性作为材料性能变化的基线，将马斑蝶蚕丝加工成材料格式。

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引用次数: 0

Influences of fiber orientation and process parameters on diamond wire sawn surface characteristics of 2.5D Cf/SiC composites 纤维取向和工艺参数对 2.5D Cf/SiC 复合材料金刚线锯切表面特性的影响

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Communications

Pub Date : 2024-09-14 DOI: 10.1016/j.mtcomm.2024.110421

Yihe Liu, Yufei Gao, Guanzheng Li, Zhenyu Shi

2.5D C/SiC composite materials are widely used in aerospace high-temperature components, optical system structural components and other fields due to their excellent performance. For the cutting of 2.5D C/SiC composites, diamond wire saw cutting process has great potential for application. In this study, experiments were conducted on cutting 2.5D C/SiC composites with diamond wire saw along different fiber orientations (P0°, P90°, V90°) and different process parameters. The effects of fiber orientation, feed speed, and wire speed on the surface morphology, surface waviness profile, and roughness of the as-sawn surface were analyzed. The results show that fiber orientation significantly affects the fiber damage mode and surface quality of the as-sawn surface, with the surface quality of the slices ranked as V90°>P0°>P0°. The surface morphology and surface roughness improves with decreasing feed speed and increasing wire speed. However, surface waviness profile peak-valley (PV) values increases with increasing the feed speed and wire speed. The study provides experimental references for process optimization and quality improvement in diamond wire saw cutting of 2.5D C/SiC composite materials.

2.5D C/SiC 复合材料因其优异的性能被广泛应用于航空航天高温部件、光学系统结构部件等领域。对于 2.5D C/SiC 复合材料的切割，金刚石线锯切割工艺具有很大的应用潜力。本研究采用金刚石线锯对 2.5D C/SiC 复合材料进行了不同纤维取向（P0°、P90°、V90°）和不同工艺参数的切割实验。分析了纤维取向、进给速度和线速度对锯切表面形貌、表面波状曲线和粗糙度的影响。结果表明，纤维取向对纤维损伤模式和原锯切表面质量有明显影响，切片表面质量依次为 V90°>P0°>P0°。表面形貌和表面粗糙度随着进给速度的降低和线速度的增加而改善。然而，随着进给速度和线速度的增加，表面波形轮廓峰谷值（PV）会增加。该研究为金刚石线锯切割 2.5D C/SiC 复合材料的工艺优化和质量改进提供了实验参考。

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引用次数: 0

Insights into effects of Fe doping on phase stability, martensitic transformation, and magnetic properties in Ni-Mn-Ti-Fe all-d-metal Heusler alloys 深入了解掺铁对 Ni-Mn-Ti-Fe 全金属 Heusler 合金的相稳定性、马氏体转变和磁性能的影响

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Communications

Pub Date : 2024-09-12 DOI: 10.1016/j.mtcomm.2024.110415

Jiaxin Xu, Jing Bai, Yu Zhang, Keliang Guo, Qingshuang Ma, Xinjun Jiang, Jianglong Gu, Qiuzhi Gao, Liang Zuo

In this work, the effects of Fe doping on phase stability, martensitic transformation, and magnetic properties of NiMnTiFe ( = 3.125, 6.25, 9.375) all--metal Heusler alloys were systematically investigated by first-principles calculations. The results indicate a tendency for doped Fe atoms to aggregate within the NiMnTiFe alloys. As Fe concentration increases, a gradual reduction in both lattice constants and phase stability of austenite and martensite is observed. In the absence or presence of minimal Fe doping, both austenite and martensite exhibit antiferromagnetic behavior. However, at = 9.375, a transition to a ferromagnetic state is observed in the austenite phase. This transition is attributed to the activation of the ferromagnetic coupling effect in the austenite phase induced by Fe doping in the Ni-Mn-Ti alloy. In contrast, the martensite phase maintains its antiferromagnetic characteristics throughout the doping range. A comprehensive analysis of the electronic structure elucidates the underlying physical mechanisms responsible for the martensitic transformation and magnetic property changes.

在这项工作中，通过第一性原理计算系统地研究了掺杂铁对镍锰钛铁（=3.125、6.25、9.375）全金属 Heusler 合金的相稳定性、马氏体转变和磁性能的影响。结果表明，掺杂的铁原子有在镍锰钛铁合金中聚集的趋势。随着铁浓度的增加，奥氏体和马氏体的晶格常数和相稳定性逐渐降低。在不掺杂或掺杂极少量铁的情况下，奥氏体和马氏体都表现出反铁磁性。然而，在 = 9.375 时，奥氏体相过渡到铁磁态。这种转变归因于镍锰钛合金中铁的掺杂激活了奥氏体相的铁磁耦合效应。相比之下，马氏体相在整个掺杂范围内都保持了其反铁磁特性。对电子结构的全面分析阐明了导致马氏体转变和磁性能变化的基本物理机制。

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引用次数: 0

Finite element analysis and experimental study on the cutting mechanism of SiCp/Al composite in laser ultrasonic elliptic vibration turning 激光超声波椭圆振动车削 SiCp/Al 复合材料切削机理的有限元分析和实验研究

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Communications

Pub Date : 2024-09-12 DOI: 10.1016/j.mtcomm.2024.110389

Chenyang Xia, Jieqiong Lin, Mingming Lu, Xuejian Zhang, Shuang Chen

SiCp/Al composites have excellent material properties and are increasingly being used in the aerospace, military, and electronic packaging industries. However, the inhomogeneity and non-conductivity of conventional turning (CT) results in poor material surface quality and high cutting forces, which seriously hinder the application of particlereinforced metal matrix composites. The thermal softening property of laser-assisted turning (LAT) and the intermittent cutting property of two-dimensional (2D) ultrasonic elliptical vibratory turning (UEVT) offer unique advantages in improving material surface quality. Therefore, a novel laser ultrasonic elliptical vibratory turning (LUEVT) machining technique is proposed to improve the machining of SiCp/Al composites with two different volume fractions. The effect of highfrequency intermittent machining on material processing was further investigated by adjusting the pulsed laser power. Finite element modelling was used to predict the machining state, surface roughness, and chip morphology between the workpiece and the PCD tool. The effects of varying the machining parameters during the experiment on the two composites were analysed. The results showed that the LUEVT of 25 % and 45 % SiCp/Al composites were reduced by 39.3 % and 30.7 % respectively compared to the CT cutting forces. The experiments verified the consistency of the surface roughness and chip morphology with the finite element simulation results. The stability of the cutting force during the cutting process is also improved, as the material removal process mainly takes the form of small particle fragmentation and matrix encapsulation.

SiCp/Al 复合材料具有优异的材料性能，在航空航天、军事和电子封装行业的应用日益广泛。然而，传统车削（CT）的不均匀性和不导电性导致材料表面质量差、切削力大，严重阻碍了颗粒增强金属基复合材料的应用。激光辅助车削（LAT）的热软化特性和二维（2D）超声波椭圆振动车削（UEVT）的间歇切削特性在改善材料表面质量方面具有独特的优势。因此，我们提出了一种新型激光超声椭圆振动车削（LUEVT）加工技术，以改进两种不同体积分数的 SiCp/Al 复合材料的加工。通过调整脉冲激光功率，进一步研究了高频间歇加工对材料加工的影响。使用有限元模型预测了工件和 PCD 刀具之间的加工状态、表面粗糙度和切屑形态。分析了实验过程中改变加工参数对两种复合材料的影响。结果表明，与 CT 切削力相比，25 % 和 45 % SiCp/Al 复合材料的 LUEVT 分别降低了 39.3 % 和 30.7 %。实验验证了表面粗糙度和切屑形态与有限元模拟结果的一致性。切削过程中切削力的稳定性也得到了提高，因为材料去除过程主要以小颗粒破碎和基体包裹的形式进行。

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引用次数: 0

Efficient degradation of tetracycline by cobalt ferrite modified alkaline solution nanofibrous Ti3C2Tx MXene activated peroxymonosulfate system: Mechanism analysis and pathway 钴铁氧体修饰的碱性溶液纳米纤维 Ti3C2Tx MXene 活化过氧单硫酸盐体系高效降解四环素：机理分析与途径

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Communications

Pub Date : 2024-09-12 DOI: 10.1016/j.mtcomm.2024.110417

Suqing Qin, Jin Chen, Xiaofeng Yang, XinLe Wang, Huiqi Zheng, Yuzhao Ma, Yanjun Li

Magnetic CoFeO nanoparticles have received considerable attention as an activator for peroxymonosulfate (PMS) in the degradation of tetracycline. However, it is still challenging to construct CoFeO composites with good dispersion and highly exposed reactive sites. Herein, the KOH fiber-functionalized MXene matrix decorated by cobalt ferrite nanoparticles (denoted as CoFeO@Alk-MXene) was developed by electrostatic self-assembly method. The layered fibrotic structure effectively disperses and fixes cobalt ferrite nanoparticles, increasing the exposure of reactive sites. The as-prepared CoFeO@Alk-MXene material exhibited rapid removal of 100% tetracycline hydrochloride (TC-HCl) within 10 minutes by activating PMS, leveraging the excellent conductivity of alkalized MXene and the efficient activation of transition metal atoms. The experimental and theoretical analysis revealed that the electron transfer process of Ti/Ti, Co/Co and Fe/Fe, as well as the free radical and non-free radical attack behaviors produced by the adsorption of PMS by the composite, are the primary mechanisms for achieving rapid removal of pollutants. A comprehensive degradation mechanism and potential pathways were proposed based on these findings. Overall, CoFeO@Alk-MXene/PMS emerges as a promising catalytic system for TC removal.

在降解四环素的过程中，磁性 CoFeO 纳米粒子作为过一硫酸盐（PMS）的活化剂受到了广泛关注。然而，如何构建具有良好分散性和高暴露活性位点的 CoFeO 复合材料仍是一项挑战。在此，我们采用静电自组装方法开发出了由钴铁氧体纳米颗粒装饰的 KOH 纤维功能化 MXene 基质（称为 CoFeO@Alk-MXene）。层状纤维结构有效地分散和固定了钴铁氧体纳米颗粒，增加了反应位点的暴露。利用碱化 MXene 的优异导电性和过渡金属原子的高效活化，制备的 CoFeO@Alk-MXene 材料通过活化 PMS 在 10 分钟内快速去除 100% 的盐酸四环素（TC-HCl）。实验和理论分析表明，Ti/Ti、Co/Co 和 Fe/Fe 的电子传递过程以及复合材料吸附 PMS 后产生的自由基和非自由基攻击行为是实现快速去除污染物的主要机制。基于这些发现，提出了一种全面的降解机制和潜在途径。总之，CoFeO@Alk-MXene/PMS 是一种很有前景的去除三氯甲烷的催化体系。

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引用次数: 0

On microstructures and mechanical properties of automotive (Graphtie-TiB2)/Cu composites with different milling times 不同研磨时间的汽车（石墨-TiB2）/铜复合材料的微观结构和机械性能

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Communications

Pub Date : 2024-09-12 DOI: 10.1016/j.mtcomm.2024.110388

Xirui Gao, Kangyi Deng, Hengqing Li, Ping Zhu, Xiumin Yang, Lei Zhang, Yangzhen Liu

Copper (Cu) matrix composites are the most attractive materials in rail transit, aerospace and other fields because of their excellent electrical conductivity and strength. The aim of this study was to determine the effect of milling time on the microstructure and mechanical properties of the (Graphtie-TiB)/Cu composites. The composites were prepared using rapid hot pressing sintering at the milling time of 4, 6, 8, 10 and 12. The structural, physical and mechanical properties of the composites was characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and compression test. The results revealed that the particles size decreased with an increase in milling time, especially the particles size drop sharply during the first 4 h of milling, and the particles size directly decreased from 44.3 μm to about 13.2 μm. The full width at half maximum of diffraction peak increased gradually with an increase in milling time. The relative density, hardness, elastic modulus, electrical conductivity and compressive strength of the composites reached the maximum at 6 h, which were 99.1 %, 86.6 HV, 137.1 GPa, 45.6 %IACS, and 228.8 MPa, respectively. Compared with 12 h, the hardness, electrical conductivity and compressive strength at 6 h were increased by 5.7 %, 79.4 % and 56.9 %, respectively. Finally, the fracture mechanism of the composites was analyzed by observing the fracture morphology.

铜（Cu）基复合材料因其出色的导电性和强度而成为轨道交通、航空航天和其他领域最具吸引力的材料。本研究旨在确定研磨时间对（Graphtie-TiB）/铜复合材料微观结构和机械性能的影响。采用快速热压烧结法制备的复合材料的研磨时间分别为 4、6、8、10 和 12。利用 X 射线衍射（XRD）、扫描电子显微镜（SEM）和压缩试验对复合材料的结构、物理和机械性能进行了表征。结果表明，随着研磨时间的延长，颗粒尺寸逐渐减小，特别是在研磨的前 4 小时，颗粒尺寸急剧下降，从 44.3 μm 直接减小到约 13.2 μm。随着研磨时间的延长，衍射峰的半最大全宽逐渐增大。复合材料的相对密度、硬度、弹性模量、电导率和抗压强度在 6 h 时达到最大值，分别为 99.1 %、86.6 HV、137.1 GPa、45.6 %IACS 和 228.8 MPa。与 12 小时相比，6 小时的硬度、导电率和抗压强度分别提高了 5.7%、79.4% 和 56.9%。最后，通过观察断口形态分析了复合材料的断裂机理。

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引用次数: 0

Prediction of the structure of polymer-coated cardboards produced by thermocompression using I-optimal design of experiment 利用 I-优化实验设计预测热压法生产的聚合物涂层纸板的结构

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Communications

Pub Date : 2024-09-12 DOI: 10.1016/j.mtcomm.2024.110411

Allison Vercasson, Luc Choisnard, Elsa Lamberet, Sébastien Gaucel, Valérie Guillard, Hélène Angellier-Coussy

The production of contrasted polymer-coated cardboards is necessary to establish the structure/properties relationships and produce the « just necessary » packaging materials. For that purpose, the impact of the processing parameters on the resulting structure of polymer-coated cardboards was modeled using a statistical Design of Experiment (DOE) approach. Five independent factors were considered: three numeric continuous factors, the pressure, the temperature, and the duration of thermocompression, one numeric discrete factor, the initial polymer film thickness, and one categorical factor, the cardboard type. Four responses were considered: the thicknesses of each of the three layers constituting polymer-coated cardboards (i.e., the free polymer, the impregnated, and the free cardboard) and the material’s curvature. The choice of the adequate DOE was first assessed using a Scoping Design and coupled with the characterization of the used polymer, i.e., poly(3-hydroxybutyrate-co-3-hydroxyvalerate (PHBV). The I-optimal DOE was found to be the most suitable and was therefore implemented. To validate the model, the DOE was then used to produce two targeted structures, one with no impregnation of the polymer and another one with a complete impregnation of the cardboard. The values of thicknesses and curvature were not significantly different from the model predictions, therefore verifying the model.

生产对比聚合物涂层纸板是建立结构/性能关系和生产 "刚需 "包装材料的必要条件。为此，我们采用统计实验设计（DOE）方法模拟了加工参数对聚合物涂层纸板最终结构的影响。实验中考虑了五个独立因素：三个连续数值因素，即压力、温度和热压持续时间；一个离散数值因素，即初始聚合物膜厚度；以及一个分类因素，即纸板类型。考虑了四个响应：构成聚合物涂层纸板（即游离聚合物、浸渍纸板和游离纸板）的三层中每一层的厚度以及材料的曲率。首先使用范围设计评估了适当 DOE 的选择，并结合了所用聚合物（即聚 3-羟基丁酸-3-羟基戊酸（PHBV））的特性。I-optimal DOE 被认为是最合适的，因此得以实施。为了验证该模型，我们使用 DOE 制作了两种目标结构，一种是未浸渍聚合物的结构，另一种是完全浸渍纸板的结构。厚度和曲率值与模型预测值相差不大，因此验证了模型。

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引用次数: 0

Mechanical properties and cross-scale synergistic modification mechanism of micro-nano carbon fiber modified concrete 微纳米碳纤维改性混凝土的力学性能和跨尺度协同改性机理

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Communications

Pub Date : 2024-09-12 DOI: 10.1016/j.mtcomm.2024.110401

Zhihang Wang, Erlei Bai, Biao Ren, Yuhang Du, Chaojia Liu

In order to explore the cross-scale synergistic modification effect of carbon fiber (CF) and carbon nanofiber (CNF) on the mechanical properties of concrete, based on CNF modified concrete (NCFC, with CNF volume content of 0.3 %), four kinds of micro-nano carbon fiber modified concrete (MNCFMC, with CNF volume content of 0.3 % and CF volume content of 0.1∼0.4 %) are prepared. For comparison, four kinds of CF modified concrete (CFMC, with CF volume content of 0.1∼0.4 %) are also prepared. The compressive, flexural and splitting tensile strength of concrete are tested, and the cross-scale synergistic modification mechanism is analyzed by SEM and MIP tests. The results show that CF and CNF have cross-scale synergistic improvement effect on the mechanical properties of concrete. The mechanical properties of concrete can be further improved by adding CF with appropriate content on the basis of the addition of CNF. With the increase of CF content, the compressive, flexural and splitting tensile strength of MNCFMC first increase and then decrease. The mechanical properties of MNCFMC are the best when the CF content is 0.2 %, the compressive, flexural and splitting tensile strength of MNCFMC increase by 14.12 %, 19.69 % and 30.32 %, respectively. Compared with CFMC, the mechanical properties of MNCFMC with the same CF content are better. The physical bond between CF and concrete matrix is poor, CNF can enhance the physical bond between CF and concrete matrix by attracting the deposition of cement hydration product crystals. When CF and CNF are added together, the pore size refinement and pore structure optimization effects of fiber on concrete are the best. When the CF content is 0.2 %, the average pore size and total pore volume of MNCFMC decrease by 30.66 % and 16.86 % compared with CFMC, respectively.

为了探讨碳纤维（CF）和碳纳米纤维（CNF）对混凝土力学性能的跨尺度协同改性效应，在 CNF 改性混凝土（NCFC，CNF 体积含量为 0.3%）的基础上，制备了四种微纳米碳纤维改性混凝土（MNCFMC，CNF 体积含量为 0.3%，CF 体积含量为 0.1∼0.4%）。为了进行比较，还制备了四种 CF 改性混凝土（CFMC，CF 体积含量为 0.1∼0.4%）。测试了混凝土的抗压、抗折和劈裂拉伸强度，并通过扫描电镜和 MIP 测试分析了跨尺度协同改性机理。结果表明，CF 和 CNF 对混凝土的力学性能具有跨尺度协同改善作用。在添加 CNF 的基础上，添加适当含量的 CF 可进一步改善混凝土的力学性能。随着 CF 含量的增加，MNCFMC 的抗压、抗折和劈裂拉伸强度先增大后减小。当 CF 含量为 0.2 % 时，MNCFMC 的力学性能最好，其抗压、抗弯和劈裂拉伸强度分别提高了 14.12 %、19.69 % 和 30.32 %。与 CFMC 相比，相同 CF 含量的 MNCFMC 力学性能更好。CF 与混凝土基体之间的物理粘结性较差，CNF 可以通过吸引水泥水化产物晶体沉积来增强 CF 与混凝土基体之间的物理粘结性。当 CF 和 CNF 复合添加时，纤维对混凝土的孔径细化和孔结构优化效果最好。当 CF 含量为 0.2 % 时，与 CFMC 相比，MNCFMC 的平均孔径和总孔体积分别减少了 30.66 % 和 16.86 %。

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引用次数: 0

Pure α-phase (FAPbI3)0.83(MAPbBr3)0.17 powder for efficient perovskite solar cells with enhancing reproducibility 用于高效过氧化物太阳能电池的纯 α 相 (FAPbI3)0.83(MAPbBr3)0.17 粉末，可提高重现性

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Communications

Pub Date : 2024-09-12 DOI: 10.1016/j.mtcomm.2024.110398

Tianxiang Zhao, Yanchun Guo, Xia Yang, Qiu Xiong, Peng Gao, Lingyi Meng, Zhihua Xiong

Commercializing perovskite solar cells (PSCs) necessitates achieving high performance and reproducibility. One effective strategy for this is the precise regulation of raw powder components in the precursor solution to create high-quality perovskite films. In this study, explored the impact of various precursor solutions on the crystallinity and photovoltaic performance of α-phase (FAPbI)(MAPbBr) perovskite systems. A synthesis method utilizing a mixed powder (FAPbI)(MAPbBr), designated as P2, was developed to address reproducibility issues in PSCs arising from unbalanced stoichiometric ratios. The resulting P2-based perovskite film exhibited large grain size and minimal defects, leading to PSCs with an impressive power conversion efficiency (PCE) of 21.36 % and an open-circuit voltage () of 1.142 V. Encouragingly, the P2-based PSCs demonstrated outstanding reproducibility and storage stability, with PCE decay limited to 2.1 % at room temperature over a 21-day period.

要使过氧化物太阳能电池（PSC）商业化，就必须实现高性能和可重复性。为此，一种有效的策略是精确调节前驱体溶液中的原始粉末成分，以生成高质量的过氧化物薄膜。本研究探讨了各种前驱体溶液对 α 相 (FAPbI)(MAPbBr) 包晶石系统的结晶度和光伏性能的影响。我们开发了一种利用混合粉末 (FAPbI)(MAPbBr)（命名为 P2）的合成方法，以解决因化学计量比不平衡而产生的 PSC 可重复性问题。所制备的基于 P2 的过氧化物薄膜具有较大的晶粒尺寸和最小的缺陷，从而使 PSC 的功率转换效率（PCE）达到了惊人的 21.36%，开路电压（）达到了 1.142 V。令人鼓舞的是，基于 P2 的 PSCs 表现出了出色的可重复性和存储稳定性，在室温下 21 天的 PCE 衰减限制在 2.1%。

引用次数: 0

Study on microstructure and corrosion behavior of T-joints of 2A12 and 2A97 aluminum alloys by FSW 通过 FSW 研究 2A12 和 2A97 铝合金 T 形接头的微观结构和腐蚀行为

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Communications

Pub Date : 2024-09-12 DOI: 10.1016/j.mtcomm.2024.110368

Wen Li, Shaojie Li, Yang Nan, Xuepiao Bai, Weiping Li

T-shaped joints of high-strength aluminum alloy welded by friction stir welding (FSW) are expected to replace the traditional riveting structures. However, the popularization of FSW in aerospace industry is still hindered by the corrosion of T-joint. Herein, T-joints of 2A12 and 2A97 aluminum alloys are prepared and studied via structural characterization and corrosion tests. The microstructures and constituents of different micro zones in T-joints before and after corrosion tests are characterized and analyzed particularly. The internal relationship between different micro zones in T-joints and their corrosion behaviors are clarified, which provides theoretical basis for improving welding process and surface protection after welding.

采用搅拌摩擦焊（FSW）焊接的高强度铝合金 T 形接头有望取代传统的铆接结构。然而，由于 T 形接头的腐蚀问题，搅拌摩擦焊在航空航天工业中的推广仍受到阻碍。本文制备了 2A12 和 2A97 铝合金的 T 形接头，并通过结构表征和腐蚀试验对其进行了研究。特别对腐蚀试验前后 T 形接头中不同微区的微观结构和成分进行了表征和分析。阐明了 T 型接头中不同微区的内部关系及其腐蚀行为，为改进焊接工艺和焊后表面保护提供了理论依据。

引用次数: 0