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稀有金属材料与工程 2012年第S1期41卷 425-428页

作者： Li Wei liu Ping Zheng Kangpei Ma Fengcang liu xinkuan Chen Xiaohong Yang Lihong Shanghai Univ Sci & Technol Sch Mat Sci & Engn Shanghai 200093 Peoples R China

A series of CrAlN coatings with different Al content were synthesized on high-speed steel(M2)substrate by reactive direct current(DC)magnetron *** influences of Al content on the microstructure and mechanical property of CrAlN coatings were studied by scanning electron microscopy(SEM),X-ray diffraction(XRD),energy dispersive spectrum(EDS)and nano-indentation techniques,*** results indicate that the coatings exhibit only fcc c-CrN phase when Al content is less than 65 at%,and fcc c-CrN and c-AlN phases when Al content is 78 at%.The coating with Al content of 60 at%exhibits high hardness and elastic *** maximum hardness and elastic modulus values could reach 36.8 GPa and 459.5 GPa,respectively.

关键词： CrAlN coating magnetron sputtering Al content microstructure mechanical property

Study on Technology of Aluminizing and Internal Oxidation on Surface of Cu-Al-Y Alloy

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稀有金属材料与工程 2012年第S1期41卷 228-230页

作者： Chen Xiaohong liu Ping liu xinkuan Ma Fengcang Li Wei Zhang Yi Tian Baohong Shanghai Univ Sci & Technol Sch Mat Sci & Engn Shanghai 200093 Peoples R China Henan Univ Sci & Technol Luoyang 471003 Peoples R China

Aluminum was deposited by diffusion into Cu-Al-Y alloy substrates by the pack-cementation *** was carried out in two kinds of container with pot-type and can-type,and the results are *** effects of various time and temperature on the coating characteristics of Cu-Al-Y was also *** result shows that the diffusion layer is nearly 170-200μm in thickness by aluminizing treatment at 900-950℃for 6-8 h in pot-type *** aluminized layers were observed by a scanning electron micrograph(SEM),we can found:A uniform coating was achieved on Cu-Al-Y alloy surface,relatively uniform thickness and even interfaces between the layers and the *** diffusion coefficient of Al in Cu-Al-Y alloys at 900℃in pot-type container can be calculated is 3.65×10-12 m 2 /s.

关键词： Cu-Al-Y alloy aluminized layer diffusion coefficient

Synthesis of Carbon Nanotubes using Cu-Cr-O as Catalyst by Chemical Vapor Deposition

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Journal of Wuhan University of Technology(Materials Science) 2014年第5期29卷 928-932页

作者：赵腾腾刘萍 CHEN Xiaohong ZHAO Chunjing liu xinkuan LI Wei School of Mechanical Engineering University of Shanghai for Science and Technology School of Materials Science and Engineering University of Shanghai for Science and Technology

A novel powder catalyst Cu-Cr-O applied to the synthesis of carbon nanotubes （CNTs） was developed, which was prepared via ammonia precipitation method. Techniques of thermo-gravimetric/ differential scanning calorimeter （TG-DSC）, X-ray diffraction （XRD） as well as scanning electron microscopy （SEM） and transmission electron microscopy （TEM） have been employed to characterize the thermal decomposition procedure, crystal phase and micro structural morphologies of the as-synthesized materials, respectively. The results show that carbon nanotubes are successfully synthesized using Cu-Cr-O as catalyst when the precursors are calcined at 400, 500, 600, and 700 ℃. The results indicate that the calcination of the Cu-Cr-O catalyst at 600 ℃ is an effective method to get MWCNT with few nano-tube defects or amorphous carbons.

关键词： carbon nanotubes Cu-Cr-O catalyst chemical vapor deposition calcined temperature

Hydroxyapatite Growth on Ti MAO Surface Assisted by the Addition of Calcium and Phosphate Ions in Hydrothermal Treatment Solution

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稀有金属材料与工程 2012年第S1期41卷 478-480页

作者： Ma Fengcang liu Ping Li Wei liu xinkuan Chen Xiaohong Yang Lihong Zhu Jianmin Shanghai Univ Sci & Technol Sch Mat Sci & Engn Shanghai 200093 Peoples R China

Microarc oxidation was performed on Ti-6Al-4V in an electrolyte containing calcium and phosphate *** were hydrothermally treated in different solutions containing calcium and phosphate *** hydroxyapatite coatings were *** was found that hydroxyapatite coating is improved by the addition of calcium and phosphate ions in hydrothermal *** addition of phosphate ions promotes the nucleation and growth of *** the effect of single calcium ions is not *** addition of calcium and phosphate ions increases the nucleation and growth of hydroxyapatite,but decreases the preferred growth trend in some extent.

关键词： biomaterials surfaces hydroxyapatite crystal growth hydrothermal treatment thick film

Hydroxyapatite Bioceramic Coatings Prepared by Hydrothermal-electrochemical Deposition Method

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Journal of Wuhan University of Technology(Materials Science) 2014年第2期29卷 398-400页

作者：何代华 liu Ping liu xinkuan CHEN Xiaohong MA Fengcang LI Wei ZHAO Caixia TU Jieyuan School of Materials Science & Engineering University of Shanghai for Science and Technology

The hydroxyapatite（HA） ceramic coating was successfully prepared on Ti6A14V alloy by the hydrothermal-electrochemical deposition method with constant voltage model. The phases of deposits were analyzed by X-ray diffraction. The releationship between crystallinity and depositing temperature was discussed. The microstructures of hydroxyapatite coating were observed by scanning electron microscope. The experimental results showed that the phases, crystaUinity and morphologies of deposits were influenced by depositing temperature （100℃, 120℃, 140℃, 160℃, 180℃ and 200℃, respectively）. The special hydrothermal environment can lower the crystallization temperature of HA. The crystallinity of HA increases firstly and then decreases with the increase of temperature. There is little hydroxyapatite deposited on the Ti6A14V surface when the depositing temperature is 100℃. The HA deposition increases with the increase of the depositing temperature. And the HA morphologies are influenced by the depositing temperature.

关键词： hydroxyapatite coating hydrotlaermal-electrochemieal depositing temperature crystallinity

Preparation of Hydroxyapatite-titanium Dioxide Coating on Ti6Al4V Substrates using Hydrothermal-electrochemical Method

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Journal of Wuhan University of Technology(Materials Science) 2016年第2期31卷 461-467页

作者：何代华 WANG Pu liu Ping liu xinkuan MA Fengcang LI Wei CHEN Xiaohong ZHAO Jun YE Hong School of Materials Science & Engineering University of Shanghai for Science and Technology School of Mechanical Engineering University of Shanghai for Science and Technology Key Laboratory of Inorganic Coating Materials Chinese Academy of Sciences School of Traffi c and Transportation Engineering Changsha University of Science & Technology

Ti6Al4V substrates were anodized in a 0.5 mol/L H_2SO_4 solution at applied voltages of 90-140 V.A hydroxyapatite-titanium oxide（HA-TiO2）coating was then deposited on the anodized Ti6Al4 V substrates via a hydrothermal-electrochemicalmethod at a constant *** obtained films and coatings were characterized by X-ray diffraction,scanning electron microscopy,energy-dispersive X-ray spectroscopy,and Fourier-transform infrared *** microstructures of the porous films on the Ti6Al4 V substrates were studied to investigate the effect of the anodizing voltage on the phase and morphology of the HATiO_2 *** results indicated that both the phase composition and the morphology of the coatings were significantly influenced by changes in the anodizing ***-TiO_2 was directly precipitated onto the surface of the substrate when the applied voltage was between 110 and 140 *** coatings had a gradient structure and the HA exhibited both needle-like and cotton-like *** amount of cotton-like HA structures decreased with an increase in voltage from 90 to 120 V,and then increased slightly when the voltage was higher than 120 *** orientation index of the（002）plane of the coating was at a minimum when the Ti6Al4 V substrate was pretreated at 120 V.

关键词： Ti6Al4V HA-TiO_2 coating anodic oxidation hydrothermal-electrochemical method

A Comparative Study of Tribological Properties between Perfluoro and Non-perfluoro Alkylsilane Self-assembled Monolayers(SAMs)

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Journal of Wuhan University of Technology(Materials Science) 2009年第4期24卷 588-593页

作者：王新宽刘宇宏 State Key Laboratory of Tribology Tsinghua University

The tribological properties of perfluoro and non-perfluoro alkylsilane molecular films were investigated and compared detailedly. Their surface properties were characterized by X-ray photoelectron spectroscopy （XPS）, atomic force microscopy （AFM） and contact angle （CA） measurement. A ball-on-disk tribometer was used to study the frictional properties of these alkylsilane monolayers. The experimental results reveal that the alkylsilane molecular films are good candidates to decrease friction and they have good capability to endure rigorous shear forces. Perfluoro alkylsilane molecular films are bonded better with the Si substrate than the simple hydrocarbon ones. The effects of sliding velocity and normal load on friction coefficient are evident and the friction coefficient in- creases with the increase of the sliding velocity. However, friction coefficient decreases with the increase of normal load initially and then increases, indicating there exists a critical normal load for the load effect.

关键词： perfluoroalkylsilane XPS AFM friction coefficient

Hydroxyapatite crystals grown on Ti MAO film by hydrothermal treatment

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Hydroxyapatite crystals grown on Ti MAO film by hydrothermal...

铜箔表面形貌对CVD法生长石墨烯质量的影响

2012 China Functional Materials Technology and Industry Forum

作者： Ma Fengcang liu Ping Chen Yin Li Wei liu xinkuan Chen Xiaohong He Daihua School of materials science and engineering university of shanghai for science and technology School of mechanical engineering university of shanghai for science and technology

Hydroxyapatite crystals of various morphologies were grown on Ti-6Al-4V plates using Micro-arc oxidation(MAO) plus hydrothermal *** identification was carried out by *** mechanisms by which these HA crystals form is here *** was deduced that HA formation depended on the degree of supersaturation of Ca and P ions in the treated *** hydrothermal treatments with different degrees of supersaturation were designed and performed. Crystals with flake,needle-like,hexagonal column,and composite morphologies were *** formation of different HA morphologies is discussed in terms of growth *** effects of the degree of supersaturation of Ca and P ions on the morphologies of hydroxyapatite crystals are illustrated.

关键词： Hydroxyapatite Morphology Micro-arc oxidation Hydrothermal treatment

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材料研究学报 2016年第4期30卷 255-262页

作者：宋瑞利刘平张柯刘新宽陈小红上海理工大学机械工程学院上海200093 上海理工大学材料科学与工程学院上海200093

为了制备高质量、少层数的石墨烯薄膜,分别用25%HCl、2 mol/L FeCl_3腐蚀液及电化学抛光法处理铜箔,改善其表面平整度,然后利用化学气相沉积法在其表面生长石墨烯。通过调整2 mol/L Fe Cl3腐蚀铜箔的时间和电化学抛光铜箔的参数,根据SE... 详细信息

为了制备高质量、少层数的石墨烯薄膜,分别用25%HCl、2 mol/L FeCl_3腐蚀液及电化学抛光法处理铜箔,改善其表面平整度,然后利用化学气相沉积法在其表面生长石墨烯。通过调整2 mol/L Fe Cl3腐蚀铜箔的时间和电化学抛光铜箔的参数,根据SEM表征结果确定出腐蚀时间为30 s,抛光电压为10 V,抛光时间为60 s时,铜箔表面最为平整。这些方法处理铜箔后生长的石墨烯经拉曼光谱表征后得出,随着铜箔表面逐渐平整,铜箔表面更易生长出少层数,高质量的石墨烯薄膜。实验中还通过调整化学气相沉积(CVD)炉中通乙烯的时间来制备石墨烯。经SEM和拉曼光谱表征可知,延长生长时间,石墨烯薄膜的层数变厚,生长时间过短则石墨烯生长不连续。生长时间为30 s时,可生长出单层高质量的石墨烯薄膜,且石墨烯薄膜均匀致密;生长时间为60 s时,铜箔表面沉积一层石墨。所以生长单层石墨烯,控制生长时间是必要的。

关键词：无机非金属材料铜箔石墨烯化学气相沉积法质量

热加工对TiB增强钛基复合材料显微组织和力学性能的影响

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稀有金属 2018年第4期42卷 379-385页

作者：卢思瑶马凤仓刘平李伟刘新宽上海理工大学材料科学与工程学院

用原位自生技术制备了TiB增强的近α相钛基复合材料,利用光学显微镜（OM）、高温材料试验机和透射电镜（TEM）研究了热加工过程中此复合材料的魏氏组织演变和TiB晶须的取向变化,并测定了该复合材料的力学性能。研究结果表明：该复合材... 详细信息

用原位自生技术制备了TiB增强的近α相钛基复合材料,利用光学显微镜（OM）、高温材料试验机和透射电镜（TEM）研究了热加工过程中此复合材料的魏氏组织演变和TiB晶须的取向变化,并测定了该复合材料的力学性能。研究结果表明：该复合材料的β晶粒尺寸和α片层的厚度随着压下率的增加而减小,这种变化使复合材料的显微组织得到了显著细化;随着压下率的增加,延伸方向上TiB晶须取向角的小角度概率密度值急剧增加,而大角度概率密度值急剧减小,加工方向上TiB晶须的概率密度值变为原来的6倍左右;热机械加工后该复合材料较之原来的铸态材料状态,屈服强度增加了25%左右,抗拉强度增加了30%左右,时效后屈服强度和抗拉强度都提高44%左右;若没有硅化物的析出,片层状α相的厚度值b对强度的影响较小,时效后硅化物沉淀析出使厚度值b成为重要的强化因素。

关键词：钛基复合材料显微组织演变力学性能强化热加工