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Online since: August 2011
Authors: S.R. Dhakate, N. Chauhan, S. Sharma, R.B. Mathur
Mechanical cleavage of graphite originally led to the discovery of Gr-sheets [1].
On the other hand, hydrophobic property of as-synthesized Gr is limited for developing its applications.
Moreover, Gr-oxide prepared from oxidized graphite possesses lattice defects which degrade the unique electronic properties, compared with pristine Gr [7].
It is evident that with increase in concentration of EG in DMF, the factors like overlapping, thickness, area of Gr-sheets gets affected.
Dujardin, Production, properties and potential of graphene, Carbon 48 (2010) 2127-2150
Online since: October 2014
Authors: Intan Syaffinazzilla Zaine, N.A.M. Napiah, Siti Hajar Khalid, Azmi Mohamad Yusof, A.N. Alias, A.M.M. Ali
Khalid1,d 1Department of Applied Sciences, Universiti Teknologi MARA Malaysia, 13500, Permatang Pauh, Pulau Pinang, Malaysia 2Faculty of Mechanical Engineering, Universiti Teknologi MARA Malaysia, 13500, Permatang Pauh, Pulau Pinang, Malaysia 3Faculty of Applied Sciences, Universiti Teknologi MARA Malaysia, 40450, Shah Alam, Selangor, Malaysia aintan.zaine@ppinang.uitm.edu.my, bnoorezal113@ppinang.uitm.edu.my, cazmi349@ppinang.uitm.edu.my, dsitihajar057@ppinang.uitm.edu.my Keywords: Dispersion, functionalized, MWCNTs, Raman spectroscopy, UV-Vis spectroscopy.
This nature restricts their dispersion into desired surfactant and become one of the factors that decreased the unique properties of MWCNTs.
Comparing with a-MWCNTs, the morphology of f-MWCNTs seems affected by oxidation process especially for smaller nanotubes due to the introduction of structural defects at the outer sidewall.
Naseh, “A comparison of effects of plasma and acid functionalizations on structure and electrical property of multi-wall carbon nanotubes,” Appl.
Li, “Mechanical properties of cyanate ester/epoxy nanocomposites modified with plasma functionalized MWCNTs,” Compos.
Online since: July 2012
Authors: Jian Min Yi, Yong Bing Liu, Xing Wu, Yue Jin Liu
The properties of risocaine were listed in table 1, Tc and Pc was estimated by the Joback modification of Lydersen’s method, ω was estimated by Ednister method.
The parameter a, b for each pure fluid were evaluated from its critical properties and acentric factor as listed in table 1.
However, using Peng–Robinson EOS model to correlate the solubility of organic solid, we should get many fundamental data of physical properties: critical temperature, critical pressure, boiling point, acentric factor and so on.
It may be explained that pressure factor has already been considered in the factor of density when we employ Chrastil model to correlate solubility dates.
Modeling Solubility of Solids in Supercritical Fluids using Fusion Properties.
Online since: July 2006
Authors: Jiu Hua Xu, Yu Can Fu, Qing Long An
Xu 1 1College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing, 210016, China aaql0916@tom.com Keywords: Cryogenic pneumatic mist jet impinging, High-speed milling, Milling temperature, Titanium alloy Abstract.
Introduction Titanium alloys are more and more widely used in aerospace industry because of their superior mechanical properties, heat resistance and corrosion resistance.
These high temperatures greatly accelerate tool wear and lead to a poor tool life [1]. (2) Maintaining their high mechanical strength even at high temperature results in a stubborn cutting resistance at higher cutting speeds. (3) Superior mechanical strength leads to small tool-chip contact area, which causes a highly concentrated stress and heat generation on the tool nose. (4) Strong chemical reactivity with most tool materials at higher cutting temperature may easily cause tool failure.
But milling temperature is an important factor that affects the machining efficiency of Titanium alloys.
As shown in Fig.5, cutting speed is an important factor that influences the flank wear.
Online since: June 2013
Authors: Xin Cheng Li, Zhi Ping Zhuang, Wei Xing Zhu, Long Sheng Yang, Jian Hua He, Tao Jiang
Effect of Finish Rolling Deformation Conditions on Microstructure Refinement of Ultra-deep Drawing Hot Rolled Steel Sheets Xincheng Li 1, a, Zhiping Zhuang 1,b, Weixing Zhu 2,c, Jianhua He 1,d ,Tao Jiang 1,e and Longsheng Yang 3,f 1 School of Mechanical Engineering, Jiangsu University, Zhenjiang, Jiangsu, China 2 School of Electrical and Information Engineering, Jiangsu University, Zhenjiang, Jiangsu, China 3 SG Group, Zhangjiagang, Jiangsu, China a444070923@qq.com, bzhuangzp12@163.com, czhuweixing@126.com, d714779957@qq.com, e894472046@qq.com, f675387407@qq.com Keywords: Finish Rolling, Deformation Conditions, Ultra-deep Drawing Steel, Hot Rolled Steel Sheets, Microstructure Refinement.
Introduction Recently,with the rapid development of Chinese automobile industry and the popularity of the family cars,automobile manufacturing enterprises have an increasing requirements on strengthening and toughening of steel sheets,especially for high-end automotive products.And only a few kinds of steels meet such requirements,such as high-quality ultra-deep drawing steel and high-strength steel, because these steels have excellent combination property and ultra-deep drawing properties which are affected by the fine grain structure.Finish rolling deformation parameters are the main factors to the structure refinement after the confirmation of chemical composition[1,2].
(a)Vol.1 Deformation rate of 5-10-20-20s-1,the grain size of 8.0 (b)Vol.7 Deformation rate of 1-5-10-10s-1,the grain size of 7.5 (c)Vol.8 Deformation rate of 1-1-5-5s-1,the grain size of 7.0 Fig. 3 Microstructure of tested steel sheets with different deformation rate Ultra-deep drawing steel was conducted above industrial test and the results show that deformation conditions of ultra-deep drawing steel hot rolled sheet in finish rolling were significantly affected the refinement of the microstructure such as deformation,deformation temperature, deformation rate.
Online since: September 2013
Authors: Peng Ping Li, Jian Bo Xiong, Sheng Nian Wang
Therefore, for the motive of designing SCC with excellent workability and mechanical properties, proper factors such as water to binder ratio, mineral admixture and sand ratio should be chosen.
Table 2 Mix proportions and properties of concrete Mix Mix proportion [kg/m3] Slump Flow [mm] T500 [s] Δh [mm] Compressive strength [Mpa] Cement FA GGBS Sand Gravel Water 1 520 - - 826 894 165 635 4.8 20 64.5 2 416 104 - 809 877 165 640 4.9 25 60.8 3 364 156 - 803 870 165 645 3.5 20 57.2 4 312 208 - 795 862 165 655 4.3 20 54.9 5 286 234 - 792 859 165 650 3.5 25 52.7 6 364 - 156 823 892 165 650 4.3 20 62.7 7 312 - 208 821 889 165 645 3.7 25 58.2 8 260 - 260 819 888 165 640 4.4 25 56.9 9 208 - 312 817 886 165 630 4.5 25 52.1 10 260 52 208 814 881 165 635 4.3 25 59.2 11 260 104 156 808 875 165 640 4.2 20 57.4 12 260 156 104 802 868 165 640 3.4 20 56.6 13 260 208 52 796 861 165 650 3.2 15 54.2 Concrete basic properties.
Concrete basic properties, such as slump flow, T500, Δh and compressive strength at 28d are given in Table 2.
Curing age affected the chloride diffusion coefficients obviously.
Study on dense packing properties of cementitious materials.
Online since: March 2012
Authors: Fei Shen, Hua En Zhao
Functional properties of nanophase materials are different from conventional materials, which determined the related technology for the rapid development and wide application space.
The characteristics of nanophase materials are different from conventional materials in function, which is the key factor for its rapid development of correlative technology and its widely application.
All the data tell us that the CaCo3 monofilament fibers are better than domestic product in the tensile strength, elongation and shrinkage properties.
Nanophase material with high specific surface area of the nanometer particles can be easily adsorbed by the textile surface, and coating with nanometer material does not affect the fabric air permeability and handle feel.
The textile can store energy, while retaining the mechanical properties.
Online since: March 2015
Authors: Wei Feng, Shu Ting Wu
These phenomena will affect the microstructure of the formed part and play an important role in determining the mechanical properties of the deformed products.
Therefore, it is very important to investigate and understand the effect of deformation process parameters on the microstructure evolution in order to improve the mechanical properties of the products.
Ebrahimi et al. studied the dynamic recrystallization behavior of a superaustenitic stainless steel by hot compression test and investigated the effect of deformation temperature and strain rate on the flow stress during dynamic recrystallization by using the hyperbolic sine equation [5]. 20CrMnTiH steel is a low-carbon steel widely used as a gear material in China due to its high hardenability, anti-wear properties after carburization and quenching, and low temperature impact toughness [6-8].
The isothermal hot compression tests were carried out on the Gleeble-3500 thermo-mechanical simulator.
The friction between the dies and the deformed blank was assumed to be of shear type and the friction factor was set as 0.3.
Online since: February 2016
Authors: Zhen Ping Sun, Yi Liu, Dang Yi Li, Wen Xian Zhu
The process is quite simple, and it has no adverse effect on other properties of concrete.
Both of the two factors result in slump loss of concrete. [4] Material analysis.
Both of the two factors above can increase the consistence of fresh concrete, thus decreasing the slump of fresh concrete.
Properties of aggregate, such as the maximum grain size, shape, texture, graduation, water-absorbing capacity and so on, can affect the workability of fresh concrete on different levels.
Unit water dosage is the most important factor for the fluidity of concrete.
Online since: August 2019
Authors: Yurii Volfkovich, Yuliya Dzyazko
Both hydrophilic and hydrophobic pores of different size are available for an inorganic modifier that is able to affect functional properties of the polymer.
In the framework of the approach [95], embedding of particles into ion exchange polymer is determined by a number of factors.
The influence of these factors is analyzed in [95].
Sosenkin, Porous structure and wetting of fuel cell components as the factors determining their electrochemical characteristics, Russ.
Morphology and functional properties, Micropor.
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