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Journal of Central South University 2023年第1期30卷 49-60页

作者：汪彦江贾智高泽玺刘德学 State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals(Lanzhou University of Technology) Lanzhou 730050China School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050China School of Materials Science and Engineering Central South UniversityChangsha 410083China

采用电子背散射衍射(EBSD)和透射电子显微镜(TEM)技术对镍基高温合金热压缩变形行为进行了表征。所研究的高温合金在热压缩变形后的主要组织特征是亚晶粒、动态再结晶(DRX)核、DRX晶粒生长和退火孪晶的发展。考虑到变形晶粒之间的近似... 详细信息

采用电子背散射衍射(EBSD)和透射电子显微镜(TEM)技术对镍基高温合金热压缩变形行为进行了表征。所研究的高温合金在热压缩变形后的主要组织特征是亚晶粒、动态再结晶(DRX)核、DRX晶粒生长和退火孪晶的发展。考虑到变形晶粒之间的近似取向和动态再结晶结果,在低温和高应变率下,除了孪晶辅助再结晶形核外,以亚晶粒结合和旋转为特征的连续动态再结晶(CDRX)形核机制也起着主要作用。MC和γ′析出相在低温(900和1000℃)时促进了DRX的形核,但阻碍了再结晶的生长。高变形温度下的晶粒生长依赖于大角度晶界迁移引起的晶粒相互吞并,这消耗了部分退火孪晶,只有少数退火孪晶在取向偏转后保持稳定。

关键词：镍基高温合金高应变速率连续动态再结晶退火孪晶析出相

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Atomic defects,functional groups and properties in MXenes

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Chinese Chemical Letters 2021年第1期32卷 339-344页

作者： Wenjun Cui Zhi-Yi Hu Raymond RUnocic Gustaaf Van Tendeloo Xiahan Sang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China NRC(Nanostructure Research Centre) Wuhan University of TechnologyWuhan 430070China Center for Nanophase Materials Sciences Oak Ridge National LaboratoryOak RidgeTN 37831United States EMAT(Electron Microscopy for Materials Science) University of AntwerpAntwerpB-2020Belgium

MXenes,a new family of functional two-dimensional(2 D) materials,have shown great potential for an extensive variety of applications within the last *** defects and functional groups in MXenes are known to have a tremendous influence on the functional *** this review,we focus on recent progress in the characterization of atomic defects and functional group chemistry in MXenes,and how to control them to directly influence various properties(e.g.,electron transport,Li^(+) adsorption,hydrogen evolution reaction(HER) activity,and magnetism) of 2 D MXenes *** structural transformations such as oxidation and growth induced by atomic defects in MXenes are also *** review thus provides perspectives on property optimization through atomic defect engineering,and bottom-up synthesis methods based on defect-assisted homoepitaxial growth of MXenes.

关键词： MXenes Atomic defects Surface functional groups Electron microscopy Functional properties

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Influences of different Zr/Sc ratios on microstructure and mechanical properties of Al-2Si alloy

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Journal of Rare Earths 2021年第1期39卷 105-112,I0004页

作者： Qinglin Li Xiaodong Ma Binqiang Li Jiqiang Ma Xiangyu Feng Ruijie Pei Jianjun Liu School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou 730050China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

The influences of different Zr/Sc ratios on the microstructural evolution and mechanical performances of Al-2 Si alloy were investigated in this *** as-cast samples were characterized and analyzed by the scanning electron microscope(SEM)with an energy dispersive spectrometer(EDS)to indicate the refining effect of the different Zr/Sc ratios on theα-Al and Si phases in Al-2 Si *** results indicate that theα-Al phases are refined from coarse dendritic structure to relatively fine equiaxed grains when the Zr/Sc ratio is equal to 1:***,the eutectic Si phase in Al-2 Si-0.2 Zr-0.2 Sc alloy is modified from the coarse plate and needle to fine fiber and partial granular structure,and the average roundness of eutectic Si is decreased by 75%from 16 to *** the refinement ofα-Al phases and the modification of eutectic Si structure,the ultimate tensile strength(UTS)is improved by 53%and the elongation(EL)is increased by 64%when the Zr/Sc ratio is equal to 1:*** addition,the UTS decreases and EL is enhanced with the increase of tensile ***,the fracture model of Al-2 Si-0.2 Zr-0.2 Sc alloy in250℃changes into the ductile fracture.

关键词： Al-Si alloy Zr/Sc ratio α-Al phases Eutectic Si Mechanical properties Rare earths

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Double crosslinked biomimetic composite hydrogels containing topographical cues and WAY-316606 induce neural tissue regeneration and functional recovery after spinal cord injury

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Bioactive materials 2023年第6期24卷 331-345页

作者： Xingchang Zhao Xianzhe Lu Kai Li Shiqiang Song Zhaohui Luo Chuanchuan Zheng Chengliang Yang Xiumei Wang Liqiang Wang Yujin Tang Chong Wang Jia Liu Department of Orthopaedics Affiliated Hospital of Youjiang Medical University for NationalitiesBaiseGuangxiChina Guangxi Key Laboratory of Basic and Translational Research of Bone and Joint Degenerative Diseases Guangxi Biomedical Materials Engineering Research Center for Bone and Joint Degenerative DiseasesBaiseGuangxiChina Academy of Orthopedics Guangdong ProvinceGuangdong Provincial Key Laboratory of Bone and Joint Degeneration DiseasesThe Third Affiliated Hospital of Southern Medical UniversityGuangzhouChina Youjiang Medical University for Nationalities BaiseGuangxiChina School of Mechanical Engineering Dongguan University of TechnologySongshan LakeDongguanGuangdongChina State Key Laboratory of New Ceramics and Fine Processing Key Laboratory of Advanced Materials of Ministry of EducationSchool of Materials Science and EngineeringTsinghua UniversityBeijingChina State Key Laboratory of Metal Matrix Composites School of Material Science and EngineeringShanghai Jiao Tong UniversityShanghaiChina

Spinal cord injury(SCI)is an overwhelming and incurable disabling condition,for which increasing forms of multifunctional biomaterials are being tested,but with limited *** promising material should be able to fill SCI-induced cavities and direct the growth of new neurons,with effective drug loading to improve the local micro-organism environment and promote neural tissue *** this study,a double crosslinked biomimetic composite hydrogel comprised of acellularized spinal cord matrix(ASCM)and gelatin-acrylated-β-cyclodextrin-polyethene glycol diacrylate(designated G-CD-PEGDA)hydrogel,loaded with WAY-316606 to activate canonical Wnt/β-catenin signaling,and reinforced by a bundle of three-dimensionally printed aligned polycaprolactone(PCL)microfibers,was *** G-CD-PEGDA component endowed the composite hydrogel with a dynamic structure with a self-healing capability which enabled cell migration,while the ASCM component promoted neural cell affinity and *** diffusion of WAY-316606 could recruit endogenous neural stem cells and improve neuronal *** aligned PCL microfibers guided neurite elongation in the longitudinal *** behavior studies further showed that the composite hydrogel could significantly recover the motor function of rats after *** study provides a proficient approach to produce a multifunctional system with desirable physiological,chemical,and topographical cues for treating patients with SCI.

关键词： Spinal cord injury 3D printing PCL oriented fibers WAY-316606 Wnt/β-catenin signaling

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Enhanced Magnetic Interaction between Ga and Fe in Two-Dimensional van der Waals Ferromagnetic Crystal Fe_(3)GaTe_(2)

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Chinese Physics Letters 2023年第8期40卷 108-112页

作者：查鹤鸣李炜张高节刘文晶邓力玮姜琦叶茂武浩常海欣乔山 State Key Laboratory of Functional Materials for Informatics Center for Excellence in Superconducting ElectronicsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Department of Physics and State Key Laboratory of Surfac Physics Fudan UniversityShanghai 200433China State Key Laboratory of Material Processing and Die&Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Wuhan National High Magnetic Field Center and Institute for Quantum Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Center for Transformative Science ShanghaiTech UniversityShanghai 201210China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China Shenzhen R&D Center of Huazhong University of Science and Technology Shenzhen 518000China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

Fe_(3)GaTe_(2),a recently discovered van der Waals ferromagnetic crystal with the highest Curie temperature and strong perpendicular magnetic anisotropy among two-dimensional(2D)magnetic materials,has attracted significant attention and makes it a promising candidate for next-generation spintronic *** with Fe_(3)GeTe_(2),which has the similar crystal structure,the mechanism of the enhanced ferromagnetic properties in Fe_(3)GaTe_(2)is still unclear and needs to be ***,by using x-ray magnetic circular dichroism measurements,we find that both Ga and Te atoms contribute to the total magnetic moment of the system with antiferromagnetic coupling to Fe *** first-principles calculations reveal that Fe_(3)GaTe_(2)has van Hove singularities at the Fermi level in nonmagnetic state,resulting in the magnetic instability of the system and susceptibility to magnetic phase *** addition,the calculation results about the density of states in ferromagnetic states of two materials suggest that the exchange interaction between Fe atoms is strengthened by replacing Ge atoms with Ga *** findings indicate the increase of both the itinerate and local moments in Fe_(3)GaTe_(2)in view of Stoner and exchange interaction models,which results in the enhancement of the overall magnetism and a higher Curie *** work provides insight into the underlying mechanism of Fe_(3)GaTe_(2)’s remarkable magnetic properties and has important implications for searching 2D materials with expected magnetic properties in the future.

关键词： magnetic ferromagnetic mechanism

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Partial Synergistic Deformation and Crystallographic Orientation of Powder Metallurgy Ti-6al-4v Via Multi-Directional Forging

SSRN

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SSRN 2024年

作者： Qiu, Shangxing Yang, Fang Li, Yang Gou, Wei Wang, Jinfeng Chen, Cunguang Liu, Xinhua Guo, Zhimeng Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing100083 China Zhuhai519082 China University of Science and Technology Beijing School of Materials Science and Engineering Beijing China State Key Laboratory for Advanced Metals and Materials China Key Laboratory for Advanced Materials Processing of Ministry of Education China

In this study, we present a microstructural and mechanical analysis of Ti-6Al-4V alloys processed by low-temperature multi-directional forging at 900°C, achieving near-theoretical density (99.9%), with a tensile strength of 1070 MPa and elongation of 14.9%. The microstructure is characterized by simultaneous continuous and discontinuous dynamic recrystallization, related to an increase in dislocation density. Significantly, this research uncovers the interplay between crystal orientation and the synergistic deformation behaviors of α and β phases during forging, leading to novel insights into microstructural control. Specifically, changes in crystal orientation include the formation of new subgrains/grains, the disruption of the Burgers orientation relationship, and asynchronous rotation around the axis, which not only homogenizes the crystal structure within α lamellae but also enhances the spheroidization process. Moreover, our findings demonstrate that during deformation, the activation of basal and pyramidal slip systems is favored over prismatic slip, which is crucial for understanding the slip behavior under different thermomechanical conditions. The average misorientation angle and the fraction of high-angle grain boundaries are quantified, providing a detailed characterization of the evolved microstructure. This study adopts a new perspective to examine the microstructural evolution during the multidirectional forging process in powder metallurgy, presenting findings that elucidate how multidirectional forging effectively controls and predicts the microstructural and mechanical behavior of Ti-6Al-4V alloy in the future via a lower cost. © 2024, The Authors. All rights reserved.

关键词： Aluminum alloys

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Dynamic response of B4C, TiB2 and TiB2-B4C under shock wave compression

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Ceramics International 2025年

作者： Shu, Zaiqin Jing, Qiang Wan, Mingming Zhang, Jinyong School of Physics and Mechanics Wuhan University of Technology Wuhan430070 China School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China State Key laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Inner Mongolian Metal Materials Research Institute Yantai264003 China

TiB2-B4C (TBC) has been widely utilized in lightweight armor due to its exceptional mechanical properties. The Hugoniot elastic limit (HEL) has been considered as an important dynamic property of ceramics. This paper presents the shock responses of pure B4C, pure TiB2, and TiB2-B4C composite. By microstructure analysis, the amorphization in B4C and dislocations in TiB2 at shock pressures around 37 GPa in the recycled debris were observed. The dislocations in TiB2 are believed to be the reason for ‘two HELs’ in TiB2. The addition of TiB2 has little effect on the shock properties of B4C, while the shock pressure exceeds HEL. Additionally, a failure wave was detected in the ceramics at shock pressures lower than HEL. A damage parameter was defined to quantify the extent of damage in the failure zone. The incorporation of TiB2 into B4C can significantly slow down failure propagation in TBC at pressure lower than HEL. Furthermore, the analysis of the damage parameter suggests that TBC exhibits superior impact resistance compared to pure B4C and TiB2. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Amorphization

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Multifunctional additives for the enhanced performance of the doctor-blading printed perovskite solar modules

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Journal of Energy Chemistry 2025年 109卷 368-377页

作者： Linyong Tian Haoyu Cai Zhenyue Wang Yongjun Liu Juan Zhao Guodong Liu Yaqi Cheng Biqi He Hongfei Zhang Long Jiang Bofei Xue Yi-Bing Cheng Jie Zhong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan Hubei 430070 China Nanjing Aolian Light Energy Technology Co. Ltd. Nanjing Jiangsu 320115 China School of Automobile Engineering Wuhan University of Technology Wuhan Hubei 430070 China State Key Laboratory of Oil and Gas Equipment CNPC Tubular Goods Research Institute Xi’an 710077 Shaanxi China Shaanxi Provincial Key Laboratory of Clean Energy Equipment and Materials Xi’an 710077 Shaanxi China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan Guangdong 528216 China

The utilization of self-assembled monolayers (SAMs) has significantly elevated the power conversion efficiency (PCE) of inverted perovskite solar cells (PSCs). However, the inherent hydrophobicity of these SAMs poses challenges in the subsequent printing of perovskite films in PSC upscaling. In this work, we incorporated a multifunctional additive, dimethyl suberimidate dihydrochloride (DMSCl 2 ), into the perovskite precursor to enhance the quality of the blade-coated perovskite film on the SAM interlayer. Characterizations revealed that the function groups of the imino (N–H) and methoxy (CH 3 O–) DMSCl 2 facilitate both bonding between perovskite precursor and SAM molecule (Me-4PACz), which facilitates the large-area printing of perovskite film. These interactions also provide effective passivation within the perovskite films and interface defects of PSCs. As a result, a significantly enhanced PCE from 16.62% to 20.37% was obtained for the printed perovskite solar module (93.10 cm 2 ) and 25.27% for the small device (0.09 cm 2 ). Remarkable stability was achieved with 93.3% of their initial PCE after 1000 h of continuous maximum power point (MPP) tracking. This report suggests that multifunctional additive doping provides a convenient route for the upscaling of perovskite solar cells with SAM interlayers.

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Synergistic Deformation and Crystallographic Orientation of Powder Metallurgy Ti-6al-4v Via Multi-Directional Forging

SSRN

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SSRN 2024年

关键词： Aluminum alloys

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Non-equivalent D-A copolymerization strategy towards highly efficient polymer donor for polymer solar cells

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Science China Chemistry 2021年第6期64卷 1031-1038页

作者： Ziya Shang Liuyang Zhou Chenkai Sun Lei Meng Wenbin Lai Jinyuan Zhang Wenchao Huang Yongfang Li Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China School of Chemical Science University of Chinese Academy of SciencesBeijing 100049China College of Chemistry Green Catalysis CenterZhengzhou UniversityZhengzhou 455001China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528216China Laboratory of Advanced Optoelectronic Materials College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

D-A copolymerization is a broadly utilized molecular design strategy to construct high efficiency photovoltaic materials for polymer solar cells(PSCs),and all the D-A copolymer donors reported till now are the alternate D-A copolymers with equal D-and ***,we first propose a non-equivalent D-A copolymerization strategy with unequal D-and A-units,and develop three novel non-equivalent D-A copolymer donors(PM6-D1,PM6-D2 and PM6-D3 with D/A unit ratio of 1.1:0.9,1.2:0.8 and1.3:0.7,respectively)by inserting more D units into the alternate D-A copolymer PM6 backbone to finely tune the physicochemical and photovoltaic properties of the *** three non-equivalent D-A copolymers show the down-shifted highest occupied molecular orbital(HOMO)energy levels,higher hole mobility,higher degree of molecular self-assembly and higher molecular crystallinity with the increase of D-unit ratio in comparison with the alternate D-A copolymer *** a result,all the three non-equivalent D-A copolymer-based PSCs with Y6 as acceptor achieve improved power conversion efficiency(PCE)with higher V_(oc),larger J_(sc)and higher FF ***,the PM6-D1:Y6 based PSC achieved a high PCE of17.71%,which is significantly higher than that(15.82%)of the PM6:Y6 based PSC and is one of the highest performances in the binary PSCs.

关键词： polymer solar cells conjugated polymer donor materials donor-acceptor copolymers non-equivalent D-A copolymerization

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