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Cover Picture: Well-Defined Cesium Benzotriazolide as an Active Catalyst for Generating Disubstituted Ureas from Carbon Dioxide and Amines (ChemCatChem 2/2017)

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ChemCatChem 2017年第2期9卷 213-213页

作者： Cong Chien Truong Jin Kim Prof. Yunho Lee Prof. Dr. Yong Jin Kim Department of Green Process and System Engineering Korea University of Science and Technology (UST) 89 Yangdaegiro-gil Ipjang-myeon Cheonan 31056 Korea Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) 291 Daehak-ro Yuseong-gu Daejeon 34141 Korea Green Material and Process R&D Group Korea Institute of Industrial Technology (KITECH) 89 Yangdaegiro-gil Ipjang-myeon Cheonan 31056 Korea

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A mathematical model of martempering of thin martensitic stainless steel strips 6

A mathematical model of martempering of thin martensitic sta...

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6th International Congress on the Science and technology of Steelmaking, ICS 2015

作者： Pirouznia, Pouyan Andersson, Nils Å.I. Tilliander, Anders Jonsson, Pär G. Division of Applied Process Metallurgy Department of Material Science and Engineering KTH Royal Institute of Technology StockholmEE-100 44 Sweden Department of Material Science and Engineering Dalarna University FalunSE-791 88 Sweden

The martempering process produces thin martensitic stainless steel strips and is widely used for production of valve- and spring steel. Industrial trials were conducted in collaboration with Böhler Uddeholm Precision Strip, Munkfors, Sweden. These trials suggested that the quenching step is critical to control, in order to reduce uneven temperature gradients which will lead to distortions or unevenness. To investigate this, computational modelling of the temperature was performed to estimate the current situation for the conventional martempering process based on physical theories together with Comsol Multiphysics and using a steady state modeling approach. The model boundary conditions were based upon temperature measurements in the real process. Furthermore, the strip was modelled as it comes out of the heating furnace, which is filled with hydrogen gas and continues into a molten lead-bismuth bath for quenching. Thus, the temperature profile was obtained for the strip as well as its surroundings;The results show that a better insight of the martempering line could be achieved. The model results can be used to investigate disturbances in the normal operation. Furthermore, the temperature profiles can be used to optimize the process and possibly to reduce the energy consumption.

关键词： Heat transfer

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Structural Quality of GaSb/GaAs Quantum Dots for Solar Cells Analyzed by Electron Microscopy Techniques

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Microscopy and Microanalysis 2016年第S4期22卷 38-39页

作者： N. Fernández-Delgado M. Herrera N. Baladés J. S. James A. Krier H. Fujita S. I. Molina Department of Material Science Metallurgical Engineering and Inorganic Chemistry University of Cádiz 11510 Puerto Real Cádiz Spain. Physics Department Lancaster University Lancaster LA1 4YB UK. Magnetic Sensors Process Technology & Development Department Asahi-Kasei Microdevices Japan.

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Comparative analysis of sustainable consumption and production in Visegrad region - conclusions for textile and clothing sector

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IOP Conference Series: materials Science and engineering 2017年第20期254卷

作者： M Koszewska J Militki P Mizsey R Benda-Prokeinova Lodz University of Technology Faculty of Material Technologies and Textile Design Department of Materials and Commodity Sciences and Textile Metrology Zeromskiego 116 90-924 Lodz Poland Technical University of Liberec Faculty of Textile Engineering Faculty of Textile Engineering Department of Material Engineering Studentská 2 Liberec 461 17 Czech Republic Budapest University of Technology and Economics Faculty of Chemical and Biochemical Engineering Department of Chemical and Environmental Process Engineering XI. Műegyetem rkp. 3 Budapest Hungary Slovak University of Agriculture Faculty of Economics and Management Department of Statistics and Operations Research Tr. A. Hlinku 2 949 76 Nitra Slovak Republic

Gradual environmental degradation, shrinking of non-renewable resources, and lower quality of life are directly or indirectly arising from snowballing consumption. These unfavorable processes concern increasingly textile and clothing sector and are increasingly being felt in Visegrad Region (V4). The objective of the article was to access current consumption patterns in V4 countries, identify the factors that influence those patterns and finally to draw the conclusions for more sustainable consumption and production models as well as to make a comparative analysis of the results across V4 countries. A consumer survey was conducted to examine V4 citizens' attitudes and behaviors in the context of sustainable consumption. To ensure sample size and comparability across countries 2000 randomly-selected V4 citizens, aged 18 and over, were interviewed. To analyze the supply side of the market and legal framework, the desk research was used. The results allowed to give some guidelines for the joint V4 strategy for solving ecological and social problems of V4 countries as well as the conclusions for textile and clothing sector.

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Research on microstructure and wear resistance of cast-penetrated layer strengthened by nano-sized TiN intermediate alloy

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Key engineering materials 2015年 645卷 221-225页

作者： Xie, Jing-Pei Shao, Xing-Hai Liu, Shu Wang, Feng-Mei Wang, Ai-Qin Ma, Dou-Qin College of Material Science Henan University of Science and Technology Luoyang Henan471003 China Process Materials Research Institute First Tractor Company Limited Luoyang Henan471003 China School of Physical Engineering Zhengzhou University Zhengzhou Henan450001 China

High-Cr cast-penetrated layer contained nanometer ceramic particles was formed on the surface of the medium carbon steel ZG250-470 by adding nano-TiN intermediate alloy powder to cast-penetrated agent. Microstructure and wear resistance of the strengthened cast-penetrated layer were studied. The results showed that: compared with not adding intermediate alloy, there were finer and more uniform microstructure and better high temperature and high speed wear performance of strengthened cast-penetrated layer strengthened by nano-TiN intermediate alloy. Strengthening effect would be best by adding the intermediate alloy containing rare earth. By adding intermediate alloy containing Ni, the best high temperature wear resistance of cast-penetrated layer could be obtained. © (2015) Trans Tech Publications, Switzerland.

关键词： Microstructure

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A Mathematical Model of Martempering of Thin Martensitic Stainless Steel Strips

A Mathematical Model of Martempering of Thin Martensitic Sta...

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第六届国际炼钢科技大会

作者： Pouyan PIROUZNIA Nils ?.I.ANDERSSON Anders TILLIANDER P?r G.J?NSSON Division of Applied Process Metallurgy Department of Material Science and EngineeringKTH Royal Institute of Technology Department of Material Science and Engineering Dalarna University

The martempering process produces thin martensitic stainless steel strips and is widely used for production of valve- and spring *** trials were conducted in collaboration with Bonier Uddeholm Precision Strip,Munkfors,*** trials suggested that the quenching step is critical to control,in order to reduce uneven temperature gradients which will lead to distortions or *** investigate this,computational modelling of the temperature was performed to estimate the current situation for the conventional martempering process based on physical theories together with Comsol Multiphysics and using a steady state modeling *** model boundary conditions were based upon temperature measurements in the real ***,the strip was modelled as it comes out of the heating furnace,which is filled with hydrogen gas and continues into a molten lead-bismuth bath for ***,the temperature profile was obtained for the strip as well as its surroundings;The results show that a better insight of the martempering line could be *** model results can be used to investigate disturbances in the normal ***,the temperature profiles can be used to optimize the process and possibly to reduce the energy consumption.

关键词： martempering heat transfer numerical modelling

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Two-dimensional correlation spectroscopic studies on coordination between carbonyl group of butanone and metal ions

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Chinese Chemical Letters 2015年第2期26卷 177-181页

作者： Dan-Qing Gao Xiao-Pei Li Jia-Jia Shi Xiao-Yan Kang Ting-Guo Kang Jin-Ming Xia Xiao-Feng Ling Shi-Fu Weng Yi-Zhuang Xu Isao Noda Jin-Guang Wu School of Postgraduate Liaoning University of Traditional Chinese Medicine College of Chemistry and Molecular Engineering Peking University Institute of Process Engineering and Chinese Academy of Sciences College of Chemistry and Materials Hebei Normal University Two Five Eight Health Technology Co. Ltd The Third School of Clinical Medicine of Peking University Ninghai Doubly Advanced Material Co. Ltd Department of Materials Science and Engineering University of Delaware

Two dimensional asynchronous spectra were used to characterize coordination between carbonyl group of butanone and metal ions by using an approach proposed in our recent *** variation of n-π^＊transition band of carbonyl group is used to probe the coordination even if metal ions does not possess any characteristic peak in *** results indicate that Ca^2＋ and Al^3＋ show considerable ability to coordinate with the carbonyl group of butanone and bring about spectral variation of the n-π-＊transition band,which is manifested by cross peaks in 2D asynchronous spectra.

关键词： Ca^2＋ Al^3＋ Butanone Coordination 2D correlation spectroscopy

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The effect of hydrophilicity of graphene oxide as additive towards performance of polysulfone membrane

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AIP Conference Proceedings 2017年第1期1885卷

作者： Mohd Riduan Jamalludin Zawati Harun M. S. Zakaria Wan Mohd Faizal Wan Abd Rahim C. Y. Khor M. U. Rosli Muhammad Ikman Ishak M. A. M. Nawi Suhaimi Shahrin 1Faculty of Engineering Technology Universiti Malaysia Perlis (UniMAP) Aras 1 Blok S2 Kampus UniCITI Alam Sungai Chuchuh Padang Besar 02100 Perlis Indera Kayangan MALAYSIA 2Integrated Material Process Advanced Materials and Manufacturing Centre (AMMC) Faculty of Manufacturing and Mechanical Engineering Universiti Tun Hussein Onn Malaysia 86400 Parit Raja Batu Pahat Johor Darul Takzim Malaysia

This study investigates the effect of hydrophilicity of graphene oxide as additive towards properties and performance on polysulfone (PSf) membrane. A polysulfone (PSf) membrane containing graphene oxide (GO) with different content was prepared via phase inversion technique. Characterization on the fabricated membrane were water contact angle measurement, porosity and mean pore size. The effects of PSf/GO were further investigated in terms of permeation test, rejection test and antifouling test. Based on the result obtained, PSf membrane incorporating with GO additive shows better capability to permeate more water compared to unfilled PSf membrane. The PSf/GO membrane were able to increase the permeate rate rapidly with the highest value is given by sample 4 (consist of 0.7 g of GO) at 571.78 J/m2h. Furthermore, water contact angle confirmed the hydrophilicity of this membrane at 62°. The transmembrane fouling activity showed that GO embedded in PSf membrane has improved tremendously. In addition, this study revealed that 0.7g of GO had the highest permeation test, rejection test and antifouling test.

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Research on microstructure and wear resistance of cast-penetrated layer strengthened by nano-sized TiN intermediate alloy

Research on microstructure and wear resistance of cast-penet...

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16th Annual Conference and 5th International Conference on Chinese Society of Micro-Nano technology, CSMNT 2014

作者： Xie, Jing-Pei Shao, Xing-Hai Shu, Liu Wang, Feng-Mei Wang, Ai-Qin Ma, Dou-Qin College of Material Science Henan University of Science and Technology Luoyang Henan471003 China Process Materials Research Institute First Tractor Company Limited Luoyang Henan471003 China School of Physical Engineering Zhengzhou University Zhengzhou Henan450001 China

ISBN: (纸本)9783038354628

关键词： Microstructure

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Synthesis of scalable micro-droplets with heat-driven effect in flow-focusing device

Synthesis of scalable micro-droplets with heat-driven effect...

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IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)

作者： Gang Fan Dan-dan Liu Xian-ting Ding Zhi-jun Ma Jian Yang Institute of Process Equipment Zhejiang University Hangzhou China School of Biomedical Engineering Shanghai Jiao Tong University China Department of Material Engineering South China University of Technology Guangzhou China

ISBN: (纸本)9781467366960

This paper reports a new method for controlling micro- and nano-droplets by the aid of heat. Computational fluid dynamics (CFD) simulation results suggest this technique is capable of conveniently controlling the droplets sizes down to several micrometers or even nanometers. This pilot research offers the possibility of fabricating micro-droplet with specific size and without changing the fluid. Three factors are studied, including the temperature of continuous phase, the temperature of discrete phase and the temperature gradient on the orifice. The results show that heat transfer between the two phases is fast as characteristic length is in micron level. Increase in temperature can lead to the increase of the droplet radius, wherein the effect of the continuous phase temperature is the most significant.

关键词： Temperature Viscosity Heating Temperature sensors Level set Mathematical model

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