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Online since: January 2010
Authors: Athanasios Vazdirvanidis, D.C. Papamantellos, George Pantazopoulos
The transverse section showed recrystallized equiaxed grain
structure (GS = 20-25 µm), possessing multiple annealing twins, typical for the soft annealed
temper, see Fig. 4.
Fig. 2: Representative optical micrographs of longitudinal sections (Sheet #2) showing (a) the oxide distribution and (b) irregular (non-uniform) grain structure resulted from incomplete recrystallization.
Initial tube Formed connector (a) (b) (a) (b) Fig. 4: Representative optical micrographs of transverse sections showing a uniform and equiaxed grain structure with multiple annealing twins; note that the grain size is approximately up to 20-25 µm.
Gurry: Physical Chemistry of Metals, McGraw Hill, 1953
Fig. 2: Representative optical micrographs of longitudinal sections (Sheet #2) showing (a) the oxide distribution and (b) irregular (non-uniform) grain structure resulted from incomplete recrystallization.
Initial tube Formed connector (a) (b) (a) (b) Fig. 4: Representative optical micrographs of transverse sections showing a uniform and equiaxed grain structure with multiple annealing twins; note that the grain size is approximately up to 20-25 µm.
Gurry: Physical Chemistry of Metals, McGraw Hill, 1953
Online since: December 2011
Authors: Yan Sheng Yang, Wei Yu Fan, Zhe Wang, Qin Qin Zhang, Guo Zhi Nan
Generally, the viscosity-temperature characteristic is closely related to the thermal stability of colloidal structure of asphalt.
The viscosity of asphalt connects with its molecular structure, molecular weight and its distribution, intermolecular chemical and physical force when the asphalt is the Newtonian fluid [7].
This maybe attribute to the colloidal structure of evaporated residue of emulsion changed by nano SiO2.
Petroleum Chemistry.
The viscosity of asphalt connects with its molecular structure, molecular weight and its distribution, intermolecular chemical and physical force when the asphalt is the Newtonian fluid [7].
This maybe attribute to the colloidal structure of evaporated residue of emulsion changed by nano SiO2.
Petroleum Chemistry.
Online since: May 2022
Authors: Marco Caruso, Nicola Cefis, Giovanni Dotelli, Sergio Sabbadini, Chiara Moletti
Triaxial Tests on Hempcrete for Prefabricated Blocks Production
Marco Caruso1,a, Nicola Cefis2,b, Giovanni Dotelli3,c, Chiara Moletti3,d*,
Sergio Sabbadini4,e
1Materials Testing Laboratory, Politecnico di Milano, Piazza Leonardo da Vinci 32,
20133 Milan, Italy
2Department of Civil and Environmental Engineering, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy
3Department of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy
4Department of Architecture and Urban Studies, Politecnico di Milano, Via Edoardo Bonardi 3, 20133, 20133 Milano MI
amarco.caruso@polimi.it, bnicola.cefis@polimi.it, cgiovanni.dotelli@polimi.it,
d*chiara.moletti@polimi.it, esergio.sabbadini@polimi.it
Keywords: hempcrete, sustainable building materials, triaxial test, mechanical properties.
Apart from any specific formulation adopted to produce hempcrete, the presence of a porous structure, the high heterogeneity and the interaction between the solid components are the key aspects which mainly govern hempcrete mechanical behaviour; this last is expected to be anisotropic, non-linear, inelastic and stress-path dependent.
Due to the similar porous structures of hempcrete and soil, it has been considered to take advance from the widely adopted geotechnical triaxial equipment, which appears suitable to perform tests on hempcrete samples.
However, all samples show a first linear portion in stress-strain curve which can be considered comparable for all confining pressures, assuming some differences in structure associated to intrinsic variability related to the specimen preparation.
Apart from any specific formulation adopted to produce hempcrete, the presence of a porous structure, the high heterogeneity and the interaction between the solid components are the key aspects which mainly govern hempcrete mechanical behaviour; this last is expected to be anisotropic, non-linear, inelastic and stress-path dependent.
Due to the similar porous structures of hempcrete and soil, it has been considered to take advance from the widely adopted geotechnical triaxial equipment, which appears suitable to perform tests on hempcrete samples.
However, all samples show a first linear portion in stress-strain curve which can be considered comparable for all confining pressures, assuming some differences in structure associated to intrinsic variability related to the specimen preparation.
Online since: November 2011
Authors: Yan Qi Liu, Liu Zhi Yang, Xin Xin Xiao, Miao Miao Zheng
Currently, scholars both at home and abroad have got some information infrastructure of V-type complex, which could explain some properties of crystal structure.
However, some properties of crystal structure of V-type complex have been not found, many minute structure information of V-type complex has been remain in the speculated that stage.
Potato starch was purchased from Zhu Cheng Xing Mao CO., LTD; analytical grade anhydrous ethanol, butanol, hexanol, octanol and DMSO from HAOHUA chemistry reagent Luo Yang CO., LTD; Fourier infrared chromatography, FTS3000 from BIO-RAO Co., America; Test method Preparation of B-type microcrystalline starch.The preparation method of B-type microcrystalline starch was referenced Reference[2].
However, some properties of crystal structure of V-type complex have been not found, many minute structure information of V-type complex has been remain in the speculated that stage.
Potato starch was purchased from Zhu Cheng Xing Mao CO., LTD; analytical grade anhydrous ethanol, butanol, hexanol, octanol and DMSO from HAOHUA chemistry reagent Luo Yang CO., LTD; Fourier infrared chromatography, FTS3000 from BIO-RAO Co., America; Test method Preparation of B-type microcrystalline starch.The preparation method of B-type microcrystalline starch was referenced Reference[2].
Online since: January 2013
Authors: Wei Guang Wang, Gui Long Cai, Kai Xuan Tan
Effect of different Surfactant on Leaching of Uranium in Sandstone type Ores with Low Permeability
Guilong Cai1, a, Kaixuan Tan2,b and Weiguang Wang2
1School of Chemistry and Chemical, University of South China, Hengyang, Hunan, 421001, China
2School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, Hengyang, Hunan, 421001, China
acaiguilong@163.com, bnhtkx@126.com
Keywords: surfactant, leaching of uranium; sandstone-type ores.
The fluorocarbon surfactant ,which contains the unique structure and fluorocarbon chain is both hydrophobic and oleophobic and the weak interaction between them, is the most powerful chemical liquid to reduce surface tension.
This has the relationship with the molecular structure of the surfactant.
Conclusions Fluorocarbon surfactant has a lower surface tension and good permeability because of its special structure.
The fluorocarbon surfactant ,which contains the unique structure and fluorocarbon chain is both hydrophobic and oleophobic and the weak interaction between them, is the most powerful chemical liquid to reduce surface tension.
This has the relationship with the molecular structure of the surfactant.
Conclusions Fluorocarbon surfactant has a lower surface tension and good permeability because of its special structure.
Online since: May 2016
Authors: Pei Leng Teh, Yeoh Cheow Keat, A.G. Supri, S.S. Aqzna, T.N. Atiqah, Khairul Amali Hamzah, S.K. Khalijah, Y.Y. Aw
As a metal ferrite, zinc oxide have a face-centered-cubic (FCC) close packing structure.
Chemical composition of the zinc ferrites was determined by X-ray Diffraction (XRD), where is a testing to identify the crystallite phase or orientation, structure properties and atomic arrangement of the sample.
The XRD results shows that all samples composition sintered are phase zinc ferrite and all diffraction peaks can be indexed to tetrahedral spinel structure of ZnFe2O4 [11].
Materials Chemistry and Physics, Volume 138, Issue 1, 15 February 2013, Pages 102–107. (15 February 2013).
Chemical composition of the zinc ferrites was determined by X-ray Diffraction (XRD), where is a testing to identify the crystallite phase or orientation, structure properties and atomic arrangement of the sample.
The XRD results shows that all samples composition sintered are phase zinc ferrite and all diffraction peaks can be indexed to tetrahedral spinel structure of ZnFe2O4 [11].
Materials Chemistry and Physics, Volume 138, Issue 1, 15 February 2013, Pages 102–107. (15 February 2013).
Online since: November 2011
Authors: Wen Jing Li, Kong Qiang Wu, Chang Sheng Li
Synthesis and Tribological properties of MoSe2/C and MoSe2 nanoflakes
Wenjing Li1, a, Changsheng Li 2, b, Kongqiang Wu2, c
1School of Chemistry and Chemical Engineering, Jiangsu University, China
2School of Materials Science and Engineering, Jiangsu University, China
awenjingli11@yahoo.cn, blichangsheng2008@yahoo.com.cn
Keywords: MoSe2/C and MoSe2 nanoflakes, Molybdenum hexacarbonyl, Lubrication additive, Tribological properties, Synergistic effect
Abstract.The inorganic materials(inorganic materials inclusion with carbon (MoSe2/C) and MoSe2 MoSe2 were synthesized via solid-state reaction methods and characterized by a series of techniques.
MoSe2 possessed a layered structure with the metal atoms (Mo) bonded covalently between the layers of chalcogen atoms (Se) [10-12], which can also act as an intercalation host.
Fig.3f illustrates that nanoflakes are regular hexagonal structure of a single crystalline.
Moreover, as carbon has the similar structure with MoSe2, according to the theory that two kinds of material combined together by the synergistic effect may produce a better tribology behavior, maybe it’s a probable explanation for that nanoflakes of MoSe2/C have a better tribological property than MoSe2.
MoSe2 possessed a layered structure with the metal atoms (Mo) bonded covalently between the layers of chalcogen atoms (Se) [10-12], which can also act as an intercalation host.
Fig.3f illustrates that nanoflakes are regular hexagonal structure of a single crystalline.
Moreover, as carbon has the similar structure with MoSe2, according to the theory that two kinds of material combined together by the synergistic effect may produce a better tribology behavior, maybe it’s a probable explanation for that nanoflakes of MoSe2/C have a better tribological property than MoSe2.
Online since: June 2012
Authors: Hao Li, Yong You Geng, Yi Qun Wu
Selective Wet Etching Characteristics of Aginsbte Phase Change Film with Ammonium Sulfide Solution
Hao Li1, a, Yongyou Geng1,b and Yiqun Wu1,2,c*
1Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2Key Lab of Functional Inorganic Material Chemistry Heilongjiang University), Ministry of Education, Harbin 150080, China
aemail: lihao84@siom.ac.cn, bemail: yyoug@siom.ac.cn, c*email: yqwu@siom.ac.cn
Keywords: Selective Wet Etching Characteristics; Aginsbte Phase Change Film; Ammonium Sulfide
Abstract.
Introduction Laser thermal lithography [1] has recently attracted substantial attention as a new technique for fabricating patterned structures because of its promising application in high-density optical data storage, small-lot micro/nano-electro-mechanical-system devices, light-emitting diode surface structure and microelectronic industry [2-6].
Structures of the as-deposited and annealed AIST films were analyzed by X-ray diffraction (XRD) using Cu/40kV/30mA Kα radiation (Rigaku Ultima IV).
Introduction Laser thermal lithography [1] has recently attracted substantial attention as a new technique for fabricating patterned structures because of its promising application in high-density optical data storage, small-lot micro/nano-electro-mechanical-system devices, light-emitting diode surface structure and microelectronic industry [2-6].
Structures of the as-deposited and annealed AIST films were analyzed by X-ray diffraction (XRD) using Cu/40kV/30mA Kα radiation (Rigaku Ultima IV).
Online since: October 2014
Authors: Liang Hsing Chou, Maw Tien Lee, Jhih Long Tung
Department of Applied Chemistry National Chiayi University, Chiayi City,Taiwan
lhchou@mail.ncyu.edu.tw, *mtlee@mail.ncyu.edu.tw
*Corresponding author
Keywords: Polypropylene, AFM, SEM, FTIR, Partial oxidation.
Brandt [12] depicted that the cost of fibre reinforcement and related technological operations is certainly an obstacle for use of FRC in ordinary structures.
On the other hand, in successful applications in demanding structures, very special requirements ought to be satisfied; probably future developments will head toward this direction.
Brandt, Fibre reinforced cement-based (FRC) composites after over 40 years of development in building and civil engineering, Composite Structures. 86 92008) 3-9
Brandt [12] depicted that the cost of fibre reinforcement and related technological operations is certainly an obstacle for use of FRC in ordinary structures.
On the other hand, in successful applications in demanding structures, very special requirements ought to be satisfied; probably future developments will head toward this direction.
Brandt, Fibre reinforced cement-based (FRC) composites after over 40 years of development in building and civil engineering, Composite Structures. 86 92008) 3-9
Online since: April 2014
Authors: E.S. Zainudin, Zulkiflle Leman, S.M. Sapuan, Mohammad Jawaid, Ridwan Yahaya
Khan et al. [3] reported the effect of post curing effect on visco-elastic and mechanical properties of different sandwich structures.
They observed the significant effect of post curing on the bending and compressive strengths of the sandwich structures.
Thakur, Saccaharum Cilliare Fiber Reinforced Polymer Composites, E-Journal of Chemistry, 5 (2008), pp. 782-791 [2] M.
Khan, Post curing effect of poly epoxy on visco-elastic and mechanical properties of different sandwich structures.
They observed the significant effect of post curing on the bending and compressive strengths of the sandwich structures.
Thakur, Saccaharum Cilliare Fiber Reinforced Polymer Composites, E-Journal of Chemistry, 5 (2008), pp. 782-791 [2] M.
Khan, Post curing effect of poly epoxy on visco-elastic and mechanical properties of different sandwich structures.