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nano surface engineering and remanufacture engineering

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中国有色金属学会会刊：英文版 2004年第z1期14卷 1-5页

作者： XU Bin-shi National Key Laboratory for Remanufacturing Academy of Armored Force Engineering Beijing 100072 China

nano surface engineering and remanufacture engineering are introduced, and the relationship between them is set forth. It points out the superiority of nano surface engineering to the traditional one, and reveals the advantages of remanufacture engineering. Taking some nano surface techniques as samples, such as nano-materials brush electroplating, nano-materials thermal spraying and nano-materials self-repairing antifriction additive technology, it shows the applications of nano surface engineering technology to remanufacturing mechanical parts.

关键词： nano surface engineering nano composite coatings remanufacture engineering

Application of nano silica to improve self-healing of asphalt mixes

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Journal of Central South University 2017年第5期24卷 1019-1026页

作者： Ganjei Mohamad Amin Aflaki Esmail Department of Civil and Environmental Engineering Amirkabir University of TechnologyTehranIran

nano silica due to its spherical shape, tiny size and higher density compared to bitumen, may have an inherent potential to improve hot mix asphalt(HMA) self-healing. In this research scanning electron microscopy(SEM) images were used to investigate size, morphology and dispersion of nano silica particles. Additionally, HMA self-healing mechanism was also examined by SEM. Furthermore, dynamic indirect tensile test(IDT) was used to evaluate HMA self-healing index. The SEM results indicated that bitumen mortar flowing into micro cracks may be one of the most important mechanisms of HMA self-healing. The experiment results also showed that modification of bitumen by nano silica promotes the ability of the HMA self-healing.

关键词： nano silica healing index Taguchi method hot mix asphalt

Blue-shift of nano-Y_2O_3 : Eu^(3+) Emission Spectra Excited by X-ray

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Journal of Materials Science & Technology 1997年第4期13卷 351-353页

作者： Qiang LI Lian GAO and Dongsheng YAN(State Key Lab. of High Performance Ceramics & Superfine Microstructure, Shanghai Institute of Ceramics,Chinese Academy of Sciences, Shanghai 200050, China) State Key Lab. of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China

nano-Y_2O_3:Eu^(3+) powder was prepared by the homogeneous precipitation. With controlling the conditions of the reaction, nano powders with different grain size were obtained. It is found that the blue-shift phenomena exist in the nano-Y2O3:Eu3+ emission spectra excited by X-ray. The wave lengths of the peak (5D0→7F2) are related with the grain size of the powder

关键词： Eu nano Emission Spectra Excited by X-ray Blue-shift of nano-Y2O3

Plastic Deformation of nano-TiO_2 Ceramics Prepared by Different Methods

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Journal of Materials Science & Technology 1999年第1期15卷 71-74页

作者： Zuolin CUI(Research Center of nanostructure Materials, Qingdao Institute of Chemical Technology, 266042 Qingdao, China) Research Center of nanostructure Materials Qingdao Institute of Chemical Technology 266042 Qingdao China

The comparative study of the tensile plastic deformation of nano(n)-TiO2 ceramic prepared byphysical gas condensation (P) and chemical hydrolysis precipitation (C) methods was conductedby a gas pressure forming technique at 750~800℃. The results show that n-TiO2 (P) possessesexcellent property of tensile pIastic deformation comparing with n-TiO2(C). The reason for thisis attributed to the surface cleanness and soft agglomeration of n-TiO2 (P) particfe prepared inreIatively cIean vacuum condition.

关键词： TiO nano Plastic Deformation of nano-TiO2 Ceramics Prepared by Different Methods

One-step ball milling-prepared nano Fe2O3 and nitrogendoped graphene with high oxygen reduction activity and its application in microbial fuel cells

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Frontiers of Environmental Science & Engineering 2020年第2期14卷 185-195页

作者： Xingguo Guo Qiuying Wang Ting Xu Kajia Wei Mengxi Yin Peng Liang Xia Huang Xiaoyuan Zhang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

Developing high activity,low-cost and long durability catalysts for oxygen reduction reaction is of great significance for the practical application of microbial fuel *** ftill exposure of active sites in catalysts can enhance catalytic activity ***,novel Fe-N-doped graphene is successftilly synthesized via a one-step in situ ball milling *** graphite,ball milling graphene,N-doped graphene and Fe-N-doped graphene are applied in air cathodes,and enhanced performance is observed in microbial fuel cells with graphene-based ***,Fe-Ndoped graphene achieves the highest oxygen reduction reaction activity,with a maximum power density of 1380±20 mW/m^2 in microbial fUel cells and a current density of 23.8 A/m^2 at-0.16 V in electrochemical tests,which are comparable to commercial Pt and 390%and 640%of those of pristine *** investigation of the material characteristics reveals that the superior performance of Fe-Ndoped graphene results from the full exposure of Fe2O3 nanoparticles,pyrrolic N,pyridinic N and excellent Fe-N-G active sites on the graphene *** work not only suggests the strategy of maximally exposing active sites to optimize the potential of catalysts but also provides promising catalysts for the use of microbial fuel cells in sustainable energy generation.

关键词： Microbial fuel cells Air cathodes nano Fe2O3 and nitrogen-doped graphene Oxygen reduction reaction

Generalized Dual Symmetry Mechanical Performance of nano Magnetic Composite

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上海交通大学学报 2004年第Z2期38卷 48-53页

作者： Li Yong Song Jian Zhang Z.M Department of Applied Mechanics Beijing Institute of Technology Beijing100081 China State Key Laboratory of Automotive Safety And Energy Tsinghua University Beijing100084China State Key Laboratory of Automotive Safety And Energy Tsinghua University Beijing100084China Center of Solid Mechanics Beijing University of Aeronautics and AstronauticsBeijing100083China

nano magnetic composite is a kind of heterogeneous material. Scientists found the symmetrical and dual symmetrical phenomena in its structure previously and we find the generalized dual symmetry mechanical performance in nano Magnetic Composite and further establish the theory. The applicable nano magnetic composite structure is analyzed thoroughly and systematically. Such phenomena as serration and step dispersing distribution of bending stress and mirror reflection of interlaminar stress are thus found. Therefore, starting from the physical features of materials, nano Magnetic Composite are analyzed on the basis of the understanding and application of the generalized dual symmetry mechanical performance. In addition, the design parameter is optimized to attain the goal of maximizing the use of materials, which is quite meaningful.

关键词： nano magenetic composite dual symmetrical heterogeneous model

Tape Casting of Al_2O_3-TiB_2/Al_2O_3-nano-TiC Multilayer Composites

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Journal of Materials Science & Technology 1997年第4期13卷 324-326页

作者： Yuping ZENG Dongliang JIANG Shouhong TAN and Jingkun GUO(Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China) Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China

Ceramic tapes, containing Al2O3-25 wt pct TiB2(B) and Al2O3-25 wt pct nano-TiC (c), have been obtained by tape casting process. Numerous tapes (about 60～80 tapes) were prepared by stacking in turn the composition (B) and (C), laminating under 10 MPa pressure, eliminating the solvent and burning out the polymer additives. The final green bodies were hot pressed at 1750℃ and 30 MPa. The composite has a bending strength of 568 MPa and a fracture toughness of 5.8 M Pa·m1/2. SEM analysis exhibits that Al2O3 particle growth was inhibited by TiC particles in C. but TiB2 particles could not hinder Al2O3 growth in B. The curves of GTA indicates that all organic additives could be removed completely above 600℃

关键词： nano TiB Al Tape Casting of Al2O3-TiB2/Al2O3-nano-TiC Multilayer Composites TiC

Injection molding of nano structured 90W-7Ni-3Fe alloy powder prepared by high energy ball milling

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中国有色金属学会会刊：英文版 2000年第6期10卷 794-797页

作者：范景莲曲选辉黄伯云 Cent S Univ State Key Lab Powder Met Changsha 410083 Peoples R China

Blended elemental 90W 7Ni 3Fe (mass fraction, %) powder was mechanically alloyed in a planetary ball mill. nano crystalline grains were obtained after 10 h milling. The nano structured powder was processed to full density by metal injection molding approach. Compacts from the optimal powder binder mixture were studied for molding and sintering behaviors. Milling significantly increases the maximum powder loading and homogeneity of the feedstock, and enhances the sintering densification process. When solid state sintered at 1 350～1 450 ℃, the alloy shows very fine grains (～3 μm), high tensile strength (>1 130 MPa) and almost no distortion. [

关键词： tungsten heavy alloy nano structured powder injection molding

Support interaction of Pt/CeO2 and Pt/SiC catalysts prepared by nano platinum colloid deposition for CO oxidation

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Journal of Rare Earths 2020年第4期38卷 376-383页

作者： Kang Xi Yong Wang Kang Jiang Jing Xie Ying Zhou Hanfeng Lu Innovation Team of Air Pollution Control Institute of Catalytic Reaction EngineeringCollege of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014China

The interaction between Pt and its various supports can regulate the intrinsic electronic structure of Pt particles and their catalytic ***,Pt/CeO2 and Pt/SiC catalysts were successfully prepared via a facile Pt colloidal particle deposition method,and their catalytic performance in CO oxidation was ***,TEM,XPS and H2-TPR were used to identify the states of Pt particles on the support surface,as well as their effect on the performance of the *** of the Pt-O-Ce interaction is one of the factors controlling catalyst *** the oxidative treatment at low temperature,the Pt-O-Ce interaction plays an important role in improving the catalytic *** calcining at high temperature,enhanced Pt-O-Ce interaction results in the absence of metallic Pt0 on the support surface,as evidenced by the appearance of Pt2+*** is consistent with the XPS data of Pt/CeO2,and is the main reason behind the deactivation of the *** contrast,either no interaction is formed between Pt and SiC or Pt nanoparticles remain in the metallic Pt0 state on the SiC surface even after aging at 800℃in an oxidizing ***,the Pt/SiC shows better thermal stability than Pt/*** interaction between Pt and the active support may be concluded to be essential for CO oxidation at low temperature,but strong interactions may induce serious deactivation of catalytic activity.

关键词： nano platinum colloid CO oxidation Pt-O-Ce interaction CeO2 SiC Rare earths