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Friction and Wear Behaviors of nanostructured metals

Journal of Materials Science & Technology 2008年第4期24卷 483-494页

作者： Zhong HAN Yusheng ZHANG Ke LU Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang110016 China

nanostructured （ns） materials, i.e., polycrystalline materials with grain sizes in the nanometer regime （typically below 100 nm）, have drawn considerable attention in the past decades due to their unique properties such as high strength and hardness. Wear resistance of ns materials, one of the most important properties for engineering materials, has been extensively investigated in the past decades. Obvious differences have been identified in friction and wear behaviors Between the ns materials and their corresponding coarse-grained （cg） counterparts, consistently correlating with their unique structure characteristics and mechanical properties. On the other hand, the superior tribological properties of ns materials illustrate their potential applications under contact loads. The present overview will summarize the important progresses achieved on friction and wear behaviors of ns metallic materials, including ultrafine-grained （ufg） materials in recent years. Tribological properties and effects on friction and wear behaviors of ns materials will be discussed under different wear conditions including abrasive wear, sliding wear, and fretting wear. Their correlations with mechanical properties will be analyzed. Perspectives on development of this field will be highlighted as well.

关键词： nanostructured metals Friction Wear Mechanical properties Tribological properties

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2D and 3D orientation mapping in nanostructured metals: A review

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Nano Materials Science 2020年第1期2卷 50-57页

作者： Guilin Wu Wanquan Zhu Qiongyao He Zongqiang Feng Tianlin Huang Ling Zhang SØren Schmidt Andrew Godfrey Xiaoxu Huang International Joint Laboratory for Light Alloys(MOE) College of Materials Science and EngineeringChongqing UniversityChongqing400044China Shenyang National Laboratory for Materials Sciences Chongqing UniversityChongqing400044China Electron Microscopy Center of Chongqing University Chongqing UniversityChongqing400044China Department of Physics Technical University of DenmarkDK-2800 KgsLyngbyDenmark Laboratory of Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing100184China

nanostructured metals possess various excellent properties and offer the potential for a wide range of *** in the properties and performance of nanostructured metal components motivate a complete characterization of the microstructures and crystallographic orientations of nanostructured metals with nanoscale spatial *** well developed orientation mapping techniques for such characterization are electron backscatter diffraction(EBSD)in the scanning electron microscope and precession electron diffraction(PED)using diffraction spots in the transmission electron ***,these methods can only characterize the structure in two *** is still a great challenge to characterize grains in three dimensions,*** the interior of the nanostructured ***,three-dimensional orientation mapping in the transmission electron microscope(3 D-OMi TEM)was developed and further improvements of this technique are introduced in this *** of these orientation mapping techniques for structural and orientational characterizations are demonstrated by examples of surface-deformed metals with gradient nanostructures,and a sputtered gold film of nano-islands containing *** merits and challenges of each of these techniques are discussed and suggestions for further developments are proposed.

关键词： nanostructured metals Microstructure Crystallographic orientation EBSD PED 3D-OMiTEM

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Recent development of nanomaterials for carbon dioxide electroreduction

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SmartMat 2022年第1期3卷 35-53页

作者： Jianjun Su Yong Liu Yun Song Libei Huang Weihua Guo Xiaohu Cao Yubing Dou Le Cheng Geng Li Qiushi Hu Ruquan Ye Department of Chemistry State Key Laboratory of Marine PollutionCity University of Hong KongHong KongChina City University of Hong Kong Shenzhen Research Institute ShenzhenChina

Electrochemical CO_(2) reduction reaction(CO_(2)RR)to produce value‐added products has received tremendous research attention in recent *** research efforts across the globe,remarkable advancement has been achieved,including the improvement of selectivity for the reduction products,the realization of efficient reduction beyond two electrons,and the delivery of industrially relevant current *** this review,we introduce the recent development of nanomaterials for CO_(2)RR,including the zero‐dimensional graphene quantum dots,two‐dimensional materials such as metal chalcogenides and metal/covalent organic framework,singleatom catalysts,and nanostructured metal *** engineering of materials into three‐dimensional structure will also be ***,we will provide a summary of the catalytic performance and perspectives on future development.

关键词： CO_(2)reduction graphene quantum dots metal chalcogenides multielectrons products nanostructured metals single‐atom catalysts

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