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Application of BIB polishing technology in cross-section preparation of porous, layered and powder materials: A review

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Frontiers of Materials Science 2019年第2期13卷 107-125页

作者： Rongrong JIANG Ming LI Yirong YAO Jianmin GUAN huanming lu Test Center Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China University of Chinese Academy of Sciences Beijing 100049 China

For the accuracy of experimental results, preparing a high quality polished surface and cross-section of the materials for further analysis using electron backscattered diffraction (EBSD), electron probe microanalysis (EPMA), and scanning probe microscopy (SPM) is extremely important. Broad ion beam (BIB) polishing, a method based on the principle of ion bombardment, has irreplaceable advantages. It makes up for the drawbacks and limitations of traditional polishing methods such as mechanical polishing, electrochemical polishing, and chemical polishing. The ions will not leave the bombardment area during polishing, which makes the BIB method suitable for porous materials. The energy of the ion beam can be adjusted according to the sample to reduce the deformation and strain of the polishing area, especially for fragile, soft, and hard materials. The conditions that need to be controlled during BIB polishing are simple. This paper demonstrated the unique advantages of BIB polishing technology in porous, layered and powder materials characterization through some typical application examples, and guided more researchers to understand and utilize BIB polishing technology in the development of new applications.

关键词： broad ion beam polishing layered material powder cross-section porous material

Twinning,phase boundary structure and development of high coercivity in Fe-rich Sm_(2)Co_(17)-type magnets

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Journal of Rare Earths 2022年第1期40卷 102-111页

作者： Haichen Wu Zhuang Liu Chaoyue Zhang Qiqi Yang huanming lu Guoxin Chen Xinming Wang Yong Li Renjie Chen Aru Yan Analytical Center Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 3 J5201China Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China

The microstructure of twinning as well as the phase boundary between 1:5 H and 2:17 R phase in Fe-rich Sm_(2)Co_(17)-type magnets was characterized at atomic scale using nanobeam diffraction and highresolution STEM-HAADF imaging,and the reason for the dramatic increase of coercivity during slow cooling was investigated based on the microchemistry *** twinning relationship in the 2:17 R phase originates from ordered substitution of Sm atoms by Co-Co atomic pairs on every three(3033)and(3033)planes,leading to formation of two corresponding equivalent twin *** basal plane of the 2:17 R phase,the 1:3 R platelet phase across the 2:17 R cell and the 1:5 H cell boundary phase between two adjacent 2:17 R cells all can act as effective twin *** cell boundary phase is precipitated along the pyramidal habit plane,and a fully coherent phase boundary(PB)is formed between the 1:5 H and 2:17 R phases with the orientation relationship to be PB//(1121)1:5 H//(1011)_(2):17 *** phase boundary may either be parallel to or intersect with the pyramidal planes occupied by Co-Co atomic *** substantial increase of coercivity during slow cooling is ascribed to the development of large gradient of the elements concentration within the cell boundary phase,resulting in large gradient of domain wall energy,and thus the pinning strength of the cell boundary phase against magnetic domain wall motion is significantly enhanced.

关键词： Sm_(2)Co_(17)-type magnets Microstructure Twinning Phase boundary Coercivity Rare earths

In situ real-time study buckling behavior of boron nitride nanotubes with axial compression by TEM

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Chinese Chemical Letters 2019年第7期30卷 1401-1404页

作者： Guoxin Chen huanming lu Junfeng Cui Haitao Yu Bo Wang Yan Liu He Li Nan Jiang Key Laboratory of Marine Materials and Related Technologies CAS Zhejiang Key Laboratory of Marine Materials and Protective Technologies Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China University of Chinese Academy of Sciences Beijing 100049 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China

Boron nitride nanotubes(BNNTs)were treated as brittle materials and could be used to enhance the composite mechanical *** approaches were used to verify the theoretical prediction experimentally,but how to in situ real-time characterize nanomechanical properties of BNNTs was still interested to the *** in situ transmission electron microscopy(TEM)equipped with a force transducer holder had been used to study the structure evolution behavior of BNNTs with axial ***-time video and the force transducer had been used synchronously to record the whole force loading process where the mechanical deformation of BNNT began,buckled and ended with *** in dividual ultrathin BNNT was employed to con duct the loading *** results showed that the elastic deformation happened on the ***'s modulus?1.05-1.37 Tpa and elasticity coefficient?198.7-255.9 N/m of BNNT were calculated by Euler formula and Hooker's law,respectively.

关键词： BNNTs Buckling behavior Real-time In situ TEM Young's modulus Axial compression

Optically driven intelligent computing with ZnO memristor

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Fundamental Research 2024年第1期4卷 158-166页

作者： Jing Yang Lingxiang Hu Liufeng Shen Jingrui Wang Peihong Cheng huanming lu Fei Zhuge Zhizhen Ye Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100029China Center for Excellence in Brain Science and Intelligence Technology Chinese Academy of SciencesShanghai 200072China Institute of Wenzhou Zhejiang UniversityWenzhou 325006China State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China

Artificial vision is crucial for most artificial intelligence *** artificial visual systems have been facing challenges in terms of real-time information processing due to the physical separation of sensors,memories,and processors,which results in the production of a large amount of redundant data as well as the data conversion and transfer between these three components consuming most of the time and *** optoelectronic memristors with the ability to realize integrated sensing-computing-memory(ISCM)are key candidates for solving such challenges and therefore attract increasing *** present,the memristive ISCM devices can only perform primary-level computing with external light signals due to the fact that only monotonic increase of memconductance upon light irradiation is achieved in most of these ***,we propose an all-optically controlled memristive ISCM device based on a simple structure of Au/ZnO/Pt with the ZnO thin film sputtered at pure Ar *** device can perform advanced computing tasks such as nonvolatile neuromorphic computing and complete Boolean logic functions only by light irradiation,owing to its ability to reversibly tune the memconductance with ***,the device shows excellent operation stability ascribed to a purely electronic memconductance tuning ***,this study is an important step towards the next generation of artificial visual systems.

关键词： Memristor All-optically controlling ZnO thin filmArtificial vision Nonvolatile neuromorphic computing Logic-in-memory

Development of the high-strength ductile ferritic alloys via regulating the intragranular and grain boundary precipitation of G-phase

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Journal of Materials Science & Technology 2023年第5期136卷 180-199页

作者： Mujin Yang Chao Huang Jiajia Han Haichen Wu Yilu Zhao Tao Yang Shenbao Jin Chenglei Wang Zhou Li Ruiying Shu Cuiping Wang huanming lu Gang Sha Xingjun Liu School of Materials Science and Engineering Harbin Institute of TechnologyShenzhen 518055China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055China College of Materials and Fujian Provincial Key Laboratory of Materials Genome Xiamen UniversityXiamen 361005China Test Center Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Department of Materials Science and Engineering City University of Hong KongHong KongChina Department of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyShenzhen 150001China Institute of Materials Genome and Big Data Harbin Institute of TechnologyShenzhen 518055China

A typical G-phase strengthened ferritic model alloy(1Ti:Fe-20Cr-3Ni-1Ti-3Si,wt.%)has been carefully studied using both advanced experimental(EBSD,TEM and APT)and theoretical(DFT)*** the classic“solid solution and aging”process,the superfine(Fe,Ni)_(2)TiSi-L2_(1)particles densely precipitate within the ferritic grain and subsequently transform into the(Ni,Fe)_(16)Ti_(6)Si_(7)-G *** the meanwhile,the elemental segregation at grain boundaries and the resulting precipitation of a large amount of the(Ni,Fe)_(16)Ti_(6)Si_(7)-G phase are also *** nanoscale microstructural evolutions result in a remarkable increase in hardness(100-300 HV)and severe *** the“cold rolling and aging”process is used,the brittle fracture is effectively suppressed without loss of nano-precipitation strengthening *** yield strength of 1700 MPa with 4%elongation at break is *** key improvement in mechanical properties is mainly attributed to the pre-cold rolling process which effectively avoids the dense precipitation of the G-phase at the grain *** findings could shed light on the further exploration of the precipitation site via optimal processing strategies.

关键词： G-phase Precipitation strengthening Grain boundary segregation Nano-precipitates

Facile synthesized Cu-SnO2 anode materials with three-dimensional metal cluster conducting architecture for high performance lithium-ion batteries

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Chinese Chemical Letters 2018年第11期29卷 1656-1660页

作者： Zhijia Zhang Yuxuan Hou Shaofei Zhang Guoliang Zhang Ming Li huanming lu Yong Li Xuerong Zheng Zhijun Qiao Zhenyang Yu Qin Huang Jianli Kang School of Materials Science and Engineering Tianjin Polytechnic University Tianjin 300387 China School of Mechanical Engineering Tianjin Polytechnic University Tianjin 300387 China Tianjin Municipal Key Laboratory of Advanced Fibers and Energy Storage Tianjin 300387 China Test Center Ningbo Institute of Material Technology and Engineering Chinese Academy of Science (CAS) Ningbo 315201 China School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin University Tionjin 300072 China State key laboratory of separation membrane and membrane processes Tianjin Polytechnic University Tianfin 300387 China

Metal oxide anode material is one of promising candidates for the next-generation LIBs, due to its high theoretical capacity and low cost. The poor conductivity and huge volume change during charge/ discharge, however, restrict the commercialization of metal oxide anode material. In this work, we design a novel Cu-SnO2 composite derived from Cu6Sn5 alloy with three dimensional （3D） metal cluster conducting architecture. The novel Cu structure penetrates in the composite particles inducing high conductivity and space-confined SnO2, which restrict the pulverization of SnO2 during lithiation/ delithiation process. The optimized Cu-SnO2 composite anode delivers an initial discharge capacity of 933.7 mA h/g and retains a capacity of 536.1 mA h/g after 200 cycles, at 25℃ and a rate of 100 mA/g. Even at the high rate of 300 mA/g, the anode still exhibits a capacity of more than 29% of that tested at 50 mA/g. Combining with the phase and morphology analysis, the novel Cu-SnO2 composite not only has good electrical conductivity, but also possesses high theoretical capacity （995 mAh/g）, which may pave a new way for the design and construction of next-generation metal oxide anode materials with high power and cycling stability.

关键词： Cu-SnO2 composite Cu6Sn5 alloy Ball milling Anode materials Lithium-ion batteries

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掺杂石墨烯的ZnO复合材料研究进展

硅酸盐通报 2021年第3期40卷 999-1006页

作者：盛浩刘琳徐键卢焕明宁波大学信息科学与工程学院宁波315211 中国科学院宁波材料技术与工程研究所宁波315201

ZnO是一种低成本且应用广泛的材料,石墨烯具有较大的比表面积以及优良的吸附、光电等特性,易于与ZnO结合,可提高ZnO的性能。掺杂石墨烯的ZnO基材料在气体检测、抗菌表面涂层、发光二极管、透明导电电极和光催化等方面都有着应用性。本... 详细信息

ZnO是一种低成本且应用广泛的材料,石墨烯具有较大的比表面积以及优良的吸附、光电等特性,易于与ZnO结合,可提高ZnO的性能。掺杂石墨烯的ZnO基材料在气体检测、抗菌表面涂层、发光二极管、透明导电电极和光催化等方面都有着应用性。本文概述了近几年来石墨烯掺杂ZnO材料作为导电薄膜、传感器、光催化剂等在光电子、生物医疗、环保等不同领域内的研究与发展,提出了目前该复合材料在制备工艺复杂与可控性差,实际应用与理论有较大差距等问题,并对未来的研究趋势进行了预测和展望。

关键词： ZnO 石墨烯光催化气敏传感器透明导电薄膜纳米材料

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ZnO全光控忆阻器及其类突触行为

材料科学与工程学报 2021年第3期39卷 393-397页

作者：杨静卢焕明叶羽敏诸葛飞宁波大学材料科学与化学工程学院浙江宁波315211 中国科学院宁波材料技术与工程研究所浙江宁波315201 中国科学院脑科学与智能技术卓越创新中心上海200031

本研究基于ZnO制备了一种全光控忆阻器,短波光照射可增大器件电导,长波光则可降低电导,并且电导态可以长时间保持。因此,通过改变施加光信号的波长,可实现忆阻器电导的可逆调控。基于以上特性,该器件可以模拟突触基本功能,包括长程增强... 详细信息

本研究基于ZnO制备了一种全光控忆阻器,短波光照射可增大器件电导,长波光则可降低电导,并且电导态可以长时间保持。因此,通过改变施加光信号的波长,可实现忆阻器电导的可逆调控。基于以上特性,该器件可以模拟突触基本功能,包括长程增强与长程抑制、光功率密度依赖可塑性、频率依赖可塑性以及学习-遗忘-再学习的经验学习行为。与电相比,光具有高带宽、低串扰、速度快等优势,并且不改变器件微结构,因此全光控忆阻器有望应用于类脑智能系统的构建。

关键词：忆阻器全光控 ZnO 突触可塑性

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硅基GaN外延层的光致发光谱

半导体光电 1999年第2期20卷 120-122,126页

作者：张昊翔叶志镇卢焕明赵炳辉浙江大学硅材料国家重点实验室杭州310027

报道了在硅基上用简便的真空反应法制备出ＧａＮ外延层，并对其发光特性进行了研究。发现衬底晶向、生长温度和退火均会对ＧａＮ外延层的发光特性产生影响。Ｓｉ（１１１）衬底比Ｓｉ（１００）衬底更有利于ＧａＮ外延层... 详细信息

报道了在硅基上用简便的真空反应法制备出ＧａＮ外延层，并对其发光特性进行了研究。发现衬底晶向、生长温度和退火均会对ＧａＮ外延层的发光特性产生影响。Ｓｉ（１１１）衬底比Ｓｉ（１００）衬底更有利于ＧａＮ外延层的单色发光。退火使ＧａＮ外延层的发光强度降低。在１０５０ ℃下生长的ＧａＮ外延层的发光强度高于其他温度下生长的ＧａＮ

关键词：半导体材料氮化镓光致发光外延层