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Asghar Azizi, Seid Ziaoddin Shafaei, Mohammad Noaparast, Mohammad Karamoozian
《化学科学与工程前沿(英文)》 2013年 第7卷 第4期 页码 464-471 doi: 10.1007/s11705-013-1356-z
关键词: steel ball galvanic interaction pyrite chalcopyrite polarization curves
Kirsten BOBZIN, Lidong ZHAO, Thomas SCHLAEFER, Thomas WARDA
《机械工程前沿(英文)》 2011年 第6卷 第2期 页码 176-181 doi: 10.1007/s11465-011-0220-4
High-energy ball milling is an effective method to produce nanocrystalline oxides. In this study, a conventional ZrO2-7%Y2O3spray powder was ball-milled to produce nanocrystalline powders with high levels of crystalline disorders for deposition of thermal barrier coatings. The powder was milled both with 100Cr6 steel balls and with ZrO2-3%Y2O3 ceramic balls as grinding media. The milling time was varied in order to investigate the effect of the milling time on the crystallite size. The powders were investigated in terms of their crystallite sizes and morphologies by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that under given milling conditions the powder was already nanostructured after 40 min milling. The crystallite size decreased significantly with increasing milling time within first 120 min. After that, a further increase of milling time did not lead to a significant reduction of the crystallite size. Ball-milling led to lattice microstrains. Milling with the steel balls resulted in finer nano-sized crystal grains, but caused the contamination of the powder. The nano-sized crystal grains coarsened during the heat-treatment at 1250°C.
关键词: nanostrucured powders yttria stabilized zirconia (YSZ) high-energy ball milling thermal barrier coatings
Augmented hydrogen production by gasification of ball milled polyethylene with Ca(OH)
Giovanni Cagnetta, Kunlun Zhang, Qiwu Zhang, Jun Huang, Gang Yu
《环境科学与工程前沿(英文)》 2019年 第13卷 第1期 doi: 10.1007/s11783-019-1096-5
PE ball milling pretreatment induces higher H2 production and purity by gasification. Ca(OH)2 reacts at solid state with PE boosting H2 and capturing CO2. Ca(OH)2 significantly reduces methanation side-reaction.
关键词: Hydrogen production Gasification Plastic waste High energy ball milling
Sandeep PANDA, Nilotpala PRADHAN, Umaballav MOHAPATRA, Sandeep K. PANDA, Swagat S. RATH, Danda S. RAO, Bansi D. NAYAK, Lala B. SUKLA, Barada K. MISHRA
《环境科学与工程前沿(英文)》 2013年 第7卷 第2期 页码 281-293 doi: 10.1007/s11783-013-0484-5
关键词: ball mill spillage thermal activation bioleaching copper
Numerical solution, simulation and testing of the thermal dynamic characteristics of ball-screws
XIA Junyong, HU Youmin, WU Bo, SHI Tielin
《机械工程前沿(英文)》 2008年 第3卷 第1期 页码 28-36 doi: 10.1007/s11465-008-0007-4
关键词: numerical solution temperature corresponding temperature distribution end-most ball-screw
Effect of friction coefficients on the dynamic response of gear systems
BALL, Xuejun LI
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 397-405 doi: 10.1007/s11465-017-0415-4
The inevitable deterioration of the lubrication conditions in a gearbox in service can change the tribological properties of the meshing teeth. In turn, such changes can significantly affect the dynamic responses and running status of gear systems. This paper investigates such an effect by utilizing virtual prototype technology to model and simulate the dynamics of a wind turbine gearbox system. The change in the lubrication conditions is modeled by the changes in the friction coefficients, thereby indicating that poor lubrication causes not only increased frictional losses but also significant changes in the dynamic responses. These results are further demonstrated by the mean and root mean square values calculated by the simulated responses under different friction coefficients. In addition, the spectrum exhibits significant changes in the first, second, and third harmonics of the meshing components. The findings and simulation method of this study provide theoretical bases for the development of accurate diagnostic techniques.
关键词: dynamic response friction coefficient wind loads wind turbine gearbox
Kinematic error separation on five-axis NC machine tool based on telescoping double ball bar
Min WANG, Jianzhong HU, Tao ZAN
《机械工程前沿(英文)》 2010年 第5卷 第4期 页码 431-437 doi: 10.1007/s11465-010-0110-1
关键词: error modeling error separation telescoping double ball bar five-axis numerical control (NC) machining tool
Erratum to: One-step ball milling-prepared nano Fe
Xingguo Guo, Qiuying Wang, Ting Xu, Kajia Wei, Mengxi Yin, Peng Liang, Xia Huang, Xiaoyuan Zhang
《环境科学与工程前沿(英文)》 2020年 第14卷 第4期 doi: 10.1007/s11783-020-1258-5
Ball milling promoted direct liquefaction of lignocellulosic biomass in supercritical ethanol
Chunyan Yang, Xiaoliang Yuan, Xueting Wang, Kejing Wu, Yingying Liu, Changjun Liu, Houfang Lu, Bin Liang
《化学科学与工程前沿(英文)》 2020年 第14卷 第4期 页码 605-613 doi: 10.1007/s11705-019-1841-0
关键词: ball milling lignocellulose supercritical ethanol liquefaction bio-oil
One-step ball milling-prepared nano Fe
Xingguo Guo, Qiuying Wang, Ting Xu, Kajia Wei, Mengxi Yin, Peng Liang, Xia Huang, Xiaoyuan Zhang
《环境科学与工程前沿(英文)》 2020年 第14卷 第2期 doi: 10.1007/s11783-019-1209-1
关键词: Microbial fuel cells Air cathodes Nano Fe2O3 and nitrogen-doped graphene Oxygen reduction reaction
刘辉, 张俊, 赵万华
《工程(英文)》 2017年 第3卷 第5期 页码 641-647 doi: 10.1016/J.ENG.2017.04.007
On braced trapezoidal corrugated steel shear panels: An experimental and numerical study
《结构与土木工程前沿(英文)》 2023年 第17卷 第3期 页码 396-410 doi: 10.1007/s11709-023-0934-5
关键词: trapezoidal corrugated plate steel shear panel braced steel shear panel experimental study buckling resistance.
Events and reaction mechanisms during the synthesis of an Al
M. ABDELLAHI, M. ZAKERI, H. BAHMANPOUR
《化学科学与工程前沿(英文)》 2013年 第7卷 第2期 页码 123-129 doi: 10.1007/s11705-013-1325-6
标题 作者 时间 类型 操作
water chemistry and ore mineralogy on the galvanic interactions between chalcopyrite and pyrite and steel
Asghar Azizi, Seid Ziaoddin Shafaei, Mohammad Noaparast, Mohammad Karamoozian
期刊论文
characterization of nanocrystalline ZrO2-7%Y2O3 powders for thermal barrier coatings by high-energy ball
Kirsten BOBZIN, Lidong ZHAO, Thomas SCHLAEFER, Thomas WARDA
期刊论文
Augmented hydrogen production by gasification of ball milled polyethylene with Ca(OH)
Giovanni Cagnetta, Kunlun Zhang, Qiwu Zhang, Jun Huang, Gang Yu
期刊论文
Bioleaching of copper from pre and post thermally activated low grade chalcopyrite contained ball mill
Sandeep PANDA, Nilotpala PRADHAN, Umaballav MOHAPATRA, Sandeep K. PANDA, Swagat S. RATH, Danda S. RAO, Bansi D. NAYAK, Lala B. SUKLA, Barada K. MISHRA
期刊论文
Numerical solution, simulation and testing of the thermal dynamic characteristics of ball-screws
XIA Junyong, HU Youmin, WU Bo, SHI Tielin
期刊论文
Kinematic error separation on five-axis NC machine tool based on telescoping double ball bar
Min WANG, Jianzhong HU, Tao ZAN
期刊论文
Erratum to: One-step ball milling-prepared nano Fe
Xingguo Guo, Qiuying Wang, Ting Xu, Kajia Wei, Mengxi Yin, Peng Liang, Xia Huang, Xiaoyuan Zhang
期刊论文
Ball milling promoted direct liquefaction of lignocellulosic biomass in supercritical ethanol
Chunyan Yang, Xiaoliang Yuan, Xueting Wang, Kejing Wu, Yingying Liu, Changjun Liu, Houfang Lu, Bin Liang
期刊论文
One-step ball milling-prepared nano Fe
Xingguo Guo, Qiuying Wang, Ting Xu, Kajia Wei, Mengxi Yin, Peng Liang, Xia Huang, Xiaoyuan Zhang
期刊论文
Events and reaction mechanisms during the synthesis of an Al
M. ABDELLAHI, M. ZAKERI, H. BAHMANPOUR
期刊论文