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Chinese Science Bulletin 1995年第6期40卷 472-476页

作者：冯松林任闽秦刘涛徐祖雄马如璋 Institute of High Energy Physics Chinese Academy of Sciences Beijing 100080 China Department of Material Physics Beijing University of Science and Technology Beijing 100083 China

A new nanocrystalline alloy Fe73.5Cu1Nb3Si13.5B9 was cast initially as amorphous ribbons, and subsequent annealing above the crystallization temperature of the amorphous state created a homogeneous ultrafine grain structure of α-Fe（Si） solid solution with a typical grain diameter of 10—20 nm and a residual amorphous phase at the interface with a thickness of 4—5 atoms.

关键词： scanning tunneling microscopy (STM) nanocrystalline amorphous crystallization.

New nanocrystalline Fe_(70.5)(CuCrV)_(9.5) S_(12)B_8 Soft Magnetic Alloy

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Chinese Science Bulletin 1994年第12期39卷 1049-1053页

作者：张延忠 Shanghai Iron & Steel Research Institute Shanghai 200940 PRC

It has been reported that the nanocrystalline Fe73.5Cu1Nb3Si13.5B9 and Fe73.1C1.2Nb3.2-Si12.5B10 alloys show superior synthetical magnetic properties, in particular, they havelower core losses comparable with those of Co-based amorphous alloys and goodfrequency-dispersion characterstic of relative effective permeability in a widefrequency range. The high-frequency core losses of these two alloys are

关键词： nanocrystalline alloy relative initial permeability relative effective permeability relative pulse-permeability core loss.

PREPARATION OF nanocrystalline POWDER OF METALS

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Chinese Science Bulletin 1990年第7期35卷 551-553页

作者：朱勇张鸿飞沈辉李宗全水家鹏吴希俊 Institute of Solid State Physics Academia Sinica Hefei 230031 PRC

Ultrafine particles and related subjects have been recently investigated quite extensively because of their attractive properties and potential applications such as synthesis of novel materials, catalysis, microwave absorption. Ultrafme particles may be divided into two classes according to their grain sizes: one is the micro-powder composed of small particles in

关键词： nanocrystalline powder vacuum evaporation inert gas condensation thermal stability.

Preparation of Al-doped ZnO nanocrystalline aggregates with enhanced performance for dye adsorption

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Science China(Physics,Mechanics & Astronomy) 2012年第7期55卷 1198-1202页

作者： ZHANG Jin QUE WenXiu YUAN Yuan ZHONG Peng LIAO YuLong Electronic Materials Research Laboratory School of Electronic and Information EngineeringXi'an Jiaotong UniversityXi'an 710049China

Al-doped ZnO (AZO) nanocrystalline aggregates (NCAs) were prepared by a low cost colloid chemistry method and effects of the Al-doped concentration on the morphological and structural properties of the AZO NCAs were studied. The dye adsorption ability of the AZO NCAs with various Al-doped concentrations was also investigated. Results indicate that the doping of the Al ions not only does not change the wurtzite structure of the ZnO crystal but also can reduce the crystallite grain size and the particle size distribution of the NCAs, which gives them a higher specific surface area and dye adsorption ability than that of the ZnO NCAs. The as-prepared AZO NCAs would be a promising material to be applied in the dye sensitized solar cells and water treatment.

关键词： zinc oxide nanocrystalline aggregates adsorption

In Situ Synthesis of nanocrystalline Intel-metallic Compound Layer during Surface Mechanical Attrition Treatment of Zirconium

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材料热处理学报 2004年第5期 1242-1246页

作者： SUN Cai-yun', Xffi Ji-jia ', WU Xiao-lei', HONG You-shi', LIU Gang \ LU Jian3, LU Ke2 1. State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China 2. Shenyang National Laboratory for Materials Sciences, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People's Republic of China 3. LASMIS, University of Technical of Troyes, 10000, Troyes, France

The surface mechanical attrition treatment (SMAT) technique was developed to synthesize a nanocrystalline (NC) layer on the surface of metallic materials for upgrading their overall properties and performance. In this paper, by means of SMAT to a pure zirconium plate at the room temperature, repetitive multidirectional peening of steel shots (composition (wt%): 1C, ***, base Fe) severely deformed the surface layer. A NC surface layer consisting of the intermetallic compound FeCr was fabricated on the surface of the zirconium. The microstructure characterization of the surface layer was performed by using X-ray diffraction analysis, optical microscopy, scanning and transmission electron microscopy observations. The NC surface layer was about 25 urn thick and consisted of the intermetallic compound FeCr with an average grain size of 25±10 nm. The deformation-induced fast diffusion of Fe and Cr from the steel shots into Zr occurred during SMAT, leading to the formation of intermetallic compound. In addition, the NC surface layer exhibited an ultrahigh nanohardness of 10.2 GPa.

关键词： nanocrystalline intermetallic compound surface layer deformation diffusion

Synthesis of nanocrystalline α-Mo_2C from Peroxomolybdenum Compounds

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复旦学报（自然科学版） 2007年第5期46卷 859-860页

作者： Beibei Zhang1, Huaming Li1, Huoming Shu2, Wenshuai Zhu1, Jiexiang Xia1(1.College of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China 2.Department of Chemistry, Hainan Normal University, Haikou 570228, China) College of Chemistry and Chemical Engineering Jiangsu University Zhenjiang 212013 Department of Chemistry Hainan Normal University Haikou 570228

1 Introduction Considerable attentions have been focused on transition metal carbide because of their numerous valuable properties, particularly of excellent catalysis similar to noble metal[1]. There are many routes[2]to synthesize molybdenum carbide. Among them, the temperature programmed reduction of MoO3 using the mixture of hydrocarbon and hydrogen is the most promising procedure to prepare carbide catalyst. Traditionally, CH4/H2 and C2H6/H2 are the most widely used to be the carburizing resource. ...

关键词： α-Mo2C synthesis nanocrystalline peroxopolymolybdic compounds

Examining the Gas Sensing Properties of the nanocrystalline Sm2O3-WO3

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过程工程学报 2004年第Z1期4卷 167-171页

作者：邓粲达林冠男林鸿明杨宗烨 Department of Materials Engineering Tatung University Taipei 104 China

In this study, nanocrystalline (NC) WO3 and Sm2O3-WO3 gas sensors have been synthesized and deposited on Al2O3 substrate by gas condensation method, then sintering to 600℃. SEM is used to observe the morphology of the surface. TEM is used to measure the particle size. The resistance of sensor is measured in different temperatures and gas concentration to evaluate the sensing properties of NC WO3 and NC Sm2O3-WO3 sensor. The results indicate that WO3 is a usability gas sensor material. After Sm2O3 is doped in WO3, it does not obviously influence CO detection; it owns better sensitivity and stability. To UV irradiation on WO3, the sensitivity of WO3 is enhanced and it maintains WO3 recovery properties in NO2 detecting. UV irradiation on Sm2O3 doped WO3 does not show enhanced well properties as UV illuminate on WO3.

关键词： nanocrystalline WO3 Sm203-WO3 gas condensation method

Fabrication and application of nanocrystalline diamond films

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金刚石与磨料磨具工程 2008年第S1期28卷 97-103页

作者： Sun Fanghong~1,Zhang Zhiming~2,Shen Hesheng~2,Guo Songshou~2 (1.School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China 2.Research Institute of Micro/Nanometer Science & Technology, Shanghai Jiao Tong University,Shanghai 200240,China)

nanocrystalline diamond films were deposited on Co-cemented carbide substrates using acetone/ H2/Ar gas mixture by bias-enhanced hot filament chemical vapor deposition（HFCVD） *** evidence of nanocrystallinity,smoothness and purity was obtained by characterizing the sample with scanning electron microscopy（SEM）,X-ray diffraction（XRD）,Raman spectroscopy,atomic force microscopy （AFM ）,and field emission transmission electron microscopy（FE-TEM ）.The results show that nanocrystalline diamond films consists of nanocrystalline diamond grains with sizes range from 20 to 80 nm and contain a large amount of grain *** surface roughness of the films is measured as Rananocrystalline diamond.A new process is used to deposit composite diamond coatings by a two-step chemical vapor deposition procedure,including first the deposition of the rough polycrystalline diamond and then the smooth fine-grained nanocrystalline diamond *** composite diamond coatings not only display good adhesion and wear resistant properties,but also have smooth surfaces that are liable to *** coating technology can not only meet the requirement of the adhesion of diamond coatings,but also reduce surface roughness of diamond coatings effectively,thus remove the obstacles for the industrialization of CVD diamond *** diamondcoated dies with these composite coatings show obvious effect in the practical application.

关键词： Hot filament CVD nanocrystalline diamond film Composite coatings Diamond-coated dies

Study on Photocatalysis Properties of nanocrystalline Titanium Dioxide

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Journal of Shanghai University(English Edition) 2002年第3期6卷 240-243页

作者：陈怡潘晓燕马学鸣朱丽慧 Research Center of Nano-Science and Nano-Technology Shanghai University Shanghai China School of Materials Science and Engineering Shanghai University Shanghai China

Nano TiO 2 powders with pure anatase structure were prepared by the method of precipitation solution gelation, using H 2TiO 3, hydrogen peroxide and ammonia as reactants. Active red X 3B dye solution was selected as a model pollutant for the photocatalysis degradation experiments. The effects of grain sizes, dosage and microstructure of nano TiO 2 on its photocatalysis properties were studied. The results show that photo activity of the nano TiO 2 is enhanced with the grain sizes reducing or dosages increasing of nano TiO 2. However, excess increase in nano TiO 2 concentration is not advantageous to the enhancement of the photo activity. Anatase TiO 2 demonstrated a higher photo activity than rutile TiO 2. The dye solution hardly degraded without nano TiO 2 powders being added into it or under sunlight irradiation.

关键词： nanocrystalline TiO 2 photocatalysis property.

nanocrystalline Diamond Films Grown by Microwave Plasma Chemical Vapor Deposition and Its Biocompatible Property

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Advances in Materials Physics and Chemistry 2018年第4期8卷 157-176页

作者： Jihan Yang Yongping Zhang Faculty of Materials and Energy Southwest University Chongqing China

Due to its unique properties such as high hardness, light transmittance, thermal conductance, chemical stability and corrosion resistance, diamond has drawn tremendous attention in last two decades. These specific properties made diamond film a promising material for cutting tools, microwave windows, heat sinks for electronic devices and diamond electrodes. However, the diamond film with grain sizes at microscale usually exhibits high surface roughness and hinders its applications in the microelectro mechanical system (MEMS) and biological field because it is difficult to be polished by mechanical and chemical methods. With the development of the chemical vapor deposition, the nanocrystalline diamond (NCD) film has been fabricated and found new applications. The grain size of NCD film is in the range of 10 to 100 nm, which inherits the properties of the diamond and possesses the unique properties of the nanoscale materials, and the morphology of the NCD film is granular or needle-like structure. The microwave plasma chemical vapor deposition (MPCVD) has been regarded as the most promising method to deposit NCD film at low temperature. Compared to the hot filament CVD, MPCVD can grow high quality NCD film avoiding of the contamination from the filament materials. The MPCVD technique has high plasma density to activate carbonaceous compound and grow NCD film in high growth rate and low substrate temperature. The unique properties of NCD film, such as the superior electrical, mechanical and biological properties facilitate their application in various fields. The biological application, especially as a biocompatible coating, mainly includes the joint replacement implants and protective coatings and the ophthalmological prosthesis.

关键词： nanocrystalline Diamond Films Microwave Plasma Chemical Vapor Deposition Biocompatible Property