Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: December 2011
Authors: S.A. Teryusheva, G.S. Beloglazov, S.M. Beloglazov
., Russian Federation
asterjusheva@mail.ru, bdrgeorge59s@gmail.com
Keywords: inhibitors, microbiological corrosion, hydrogen absorption, mild steel, water salt media, hydroquinone, derivatives, sulphate reducing bacteria, quantum chemistry, MNDO
Abstract.
There are some microorganisms (MO) participation of which causes intensive corrosion fracture and other corrosion losses of metals (50 % of corrosion fracture of metal structures is related to such participation of MO).
Experimental The sheet samples 50x20x15 mm made of mild steel St3 (widely used in structures utilized in MO-containing media) were used in our experiment.
Ekilik: Chemical Structure and Protective Action of Inhibitors (Rostov State univ., Rostov on/Don, Russia 1978)
There are some microorganisms (MO) participation of which causes intensive corrosion fracture and other corrosion losses of metals (50 % of corrosion fracture of metal structures is related to such participation of MO).
Experimental The sheet samples 50x20x15 mm made of mild steel St3 (widely used in structures utilized in MO-containing media) were used in our experiment.
Ekilik: Chemical Structure and Protective Action of Inhibitors (Rostov State univ., Rostov on/Don, Russia 1978)
Online since: November 2013
Authors: Yong Chen Shang, Zhi Kun Qu, Le Gan Hou, Jing Huai Zhang, Mi Lin Zhang, Rui Zhi Wu, Ji Qing Li
During the hot extrusion, the large eutectic structure of as-cast alloy was crushed into small eutectic structure and the grains were effectively refined.
The magnified SEM image clearly shows the lamellar eutectic structure (intermetallic phase and eutectic α-Mg).
The fine equiaxed grain structures are also seen in the as-extruded alloy, as a result of dynamic recrystallization (DRX).
After the hot extrusion, the large eutectic structure is broken into small eutectic structure and the {0002} basal texture is formed.
Gong, Phase stability, mechanical property, and electronic structure of Mg-Li system, J.
The magnified SEM image clearly shows the lamellar eutectic structure (intermetallic phase and eutectic α-Mg).
The fine equiaxed grain structures are also seen in the as-extruded alloy, as a result of dynamic recrystallization (DRX).
After the hot extrusion, the large eutectic structure is broken into small eutectic structure and the {0002} basal texture is formed.
Gong, Phase stability, mechanical property, and electronic structure of Mg-Li system, J.
Online since: July 2013
Authors: Qiao Zhen Yu, Ying Liu, Qi Wen, Jia Li Guan, Shi Jie Zhao, Qi Xing Hu, Zhi Feng Hou
Structure–property relationship of dodecylbenzenesulfonic acid doped polyaniline
Liu Yinga, Qi Wenb, Jiali Guanc, Shijie Zhaod, Qixing Hue, Zhifeng Houf, Qiaozhen Yu*
Department of Materials and Textile Engineering, Jiaxing University, Jiaxing Zhejiang 314001, P.
Results and discussion Morphology and structure characterization.
From Fig. 1(a)–(c), it can be seen that as the molar ratio of An to DBSA was 2.1:1, with the decrease of molar ratio of An to APS, the obtained DBSA doped PANIs piled more closely; its surface structure was more ordered and had more obvious fibrous structure.
Fixing the molar ratio of An to APS was 1:1, When the molar ratio of An to DBSA was 2.1:1, the obtained DBSA doped PANIs had an obvious fibrous compact structure, while DBSA doped PANIs had fine fibers like floces and had a loose structure as molar ratio of An to DBSA was 1.5:1.
Materials Chemistry and Physics 129 (2011) 666– 672
Results and discussion Morphology and structure characterization.
From Fig. 1(a)–(c), it can be seen that as the molar ratio of An to DBSA was 2.1:1, with the decrease of molar ratio of An to APS, the obtained DBSA doped PANIs piled more closely; its surface structure was more ordered and had more obvious fibrous structure.
Fixing the molar ratio of An to APS was 1:1, When the molar ratio of An to DBSA was 2.1:1, the obtained DBSA doped PANIs had an obvious fibrous compact structure, while DBSA doped PANIs had fine fibers like floces and had a loose structure as molar ratio of An to DBSA was 1.5:1.
Materials Chemistry and Physics 129 (2011) 666– 672
Online since: October 2012
Authors: Zhen Ying Ge
Studying the technical innovation strategy of a low carbon economy can help us to develop a low carbon industrial structure, a low carbon energy structure, and a low carbon consumption structure.
As for Shandong province, we should keep the present innovation structure intact, as well as set up a specific and wide coverage structure, including electronics, machinery, chemistry, and biology, making this structure supportive of the local area as well as the rest of the province.
As for Shandong province, we should keep the present innovation structure intact, as well as set up a specific and wide coverage structure, including electronics, machinery, chemistry, and biology, making this structure supportive of the local area as well as the rest of the province.
Online since: August 2014
Authors: Biao Yu, Hai Bo Fan, Zhao Yang Liu, Zhe Peng Zhang, He Bao Yao
The physics and chemistry of H+ implanted in Si has been studied in the past three decades.
Experiments The structure sketch of the two samples are shown in Fig.1.
For the two samples, the (002) peaks centered at about 34.4° are absolutely strong and thus indicate the good crystal quality and an intense c-orientation with the wurtzite structure.
So in this growth mode, the structure and crystal quality of ZnO films are always much poor.
Therefore, infinitely thick pseudomorphic structures can be grown without misfit dislocations.
Experiments The structure sketch of the two samples are shown in Fig.1.
For the two samples, the (002) peaks centered at about 34.4° are absolutely strong and thus indicate the good crystal quality and an intense c-orientation with the wurtzite structure.
So in this growth mode, the structure and crystal quality of ZnO films are always much poor.
Therefore, infinitely thick pseudomorphic structures can be grown without misfit dislocations.
Online since: March 2017
Authors: Srimala Sreekantan, Kar Chun Lee
Template method refers to the use of anodic aluminium oxide (AAO) as initial supporting structure and TNT is grown via sol-gel process or precipitation method.
Nanotubes structure is more prominent under this continuous oxide layer.
From the top view, the morphology appears as porous structure while the side view (inset) shows the presence of tube-like structure below the porous layer.
In Fig. 2(d), high temperature anodization causes a compact continuous layer of oxide above the tubular structure.
Sagayaraj, A cost effective approach for developing substrate stable TiO2 nanotube arrays with tuned morphology: a comprehensive study on the role of H2O2 and anodization potential, New Journal of Chemistry, 39(7) (2015) 5402-5409
Nanotubes structure is more prominent under this continuous oxide layer.
From the top view, the morphology appears as porous structure while the side view (inset) shows the presence of tube-like structure below the porous layer.
In Fig. 2(d), high temperature anodization causes a compact continuous layer of oxide above the tubular structure.
Sagayaraj, A cost effective approach for developing substrate stable TiO2 nanotube arrays with tuned morphology: a comprehensive study on the role of H2O2 and anodization potential, New Journal of Chemistry, 39(7) (2015) 5402-5409
Online since: February 2013
Authors: Xiu Ping Dong, Ming Ji Huang
Introduction
Cool-drawn 1Cr18Ni9 stainless steel wires of f 0.1~0.5 mm can be woven and punched to prepare transformable component which has loose, reticulate structures.
Sample of MR damper and wires’ reticulate structures are displayed in Fig.1.
Meanwhile, it can be produced into various shapes or structures according to real requirements.
A set of new special kind of fixing structure is designed in this paper to realize wire pair wears experiments at variable load.
Experiments Cool-drawn 1Cr18Ni9 stainless steel wire of f0.3 mm is selected and its mass chemistry compositions are as follows: 0.11%C,17.50%Cr,8.50%Ni,0.039%Ti,0.026%P,1.02%Mn.
Sample of MR damper and wires’ reticulate structures are displayed in Fig.1.
Meanwhile, it can be produced into various shapes or structures according to real requirements.
A set of new special kind of fixing structure is designed in this paper to realize wire pair wears experiments at variable load.
Experiments Cool-drawn 1Cr18Ni9 stainless steel wire of f0.3 mm is selected and its mass chemistry compositions are as follows: 0.11%C,17.50%Cr,8.50%Ni,0.039%Ti,0.026%P,1.02%Mn.
Online since: March 2012
Authors: Shao Ju Shih, Jian Pu Huang, Yu Jen Chou
For example, for the catalyst supports, the ceria-based materials require the porous structures which provide higher surface area to increases the loading amount of catalysts for higher reaction efficiency [1].
Also, for the catalysts in CO oxidation, the ceria hollow structures are advantageous because their interior space and loose shell structure may enhance spatial dispersion for higher gas adsorption [2].
The SP process was chosen because of its simple operation, continuous processing, production of purity powder and chemistry flexibility [16, 17].
The field emission gun - transmission electron microscope (Tecnai G2 F20, FEI, USA), operated at 200 keV, was used to examine the morphology and the crystallographic structure of the ceria powders.
For these particles, the closed pore (hollow structure) has been recognized because the SEM image shows that the similar-sized particles have a smooth surface and without any concaved structure as indicated in Fig. 1 (a).
Also, for the catalysts in CO oxidation, the ceria hollow structures are advantageous because their interior space and loose shell structure may enhance spatial dispersion for higher gas adsorption [2].
The SP process was chosen because of its simple operation, continuous processing, production of purity powder and chemistry flexibility [16, 17].
The field emission gun - transmission electron microscope (Tecnai G2 F20, FEI, USA), operated at 200 keV, was used to examine the morphology and the crystallographic structure of the ceria powders.
For these particles, the closed pore (hollow structure) has been recognized because the SEM image shows that the similar-sized particles have a smooth surface and without any concaved structure as indicated in Fig. 1 (a).
Online since: May 2011
Authors: Yong Ming Dai, Tsung Chi Pan, Jih Mirn Jehng
Furthermore, it is interesting to modify the structures of the surface metal oxide species in order to improve their catalytic properties for specific applications.
The present investigation has systematicaly studied on the surface structure and reactivity of the surface WOx species on the oxide supports Al2O3, Nb2O5, TiO2, ZrO2, and CeO2.
Kim et. al. [15], and determined that the supported tungsten oxide structures are the same on all oxide supports as a function of tungsten oxide surface density (W/nm2).
It seems that the molecular structure of the surface tungsten oxide species has not affected with the different synthesis methods.
Kiely, Nature Chemistry Vol. 1 (2009), p. 722
The present investigation has systematicaly studied on the surface structure and reactivity of the surface WOx species on the oxide supports Al2O3, Nb2O5, TiO2, ZrO2, and CeO2.
Kim et. al. [15], and determined that the supported tungsten oxide structures are the same on all oxide supports as a function of tungsten oxide surface density (W/nm2).
It seems that the molecular structure of the surface tungsten oxide species has not affected with the different synthesis methods.
Kiely, Nature Chemistry Vol. 1 (2009), p. 722
Online since: January 2005
Authors: J.H. Baek, Yong Hwan Jeong
The microstructure and the chemistry of the Nb-contained Zr alloys are known to affect sensitively
their in-reactor behavior.
When β-quenched, the martensitic structure (α') was formed by the rapid cooling rate.
Annealed at 570 o C for 2 hours after the β-quenching, the martensitic structure remained in the matrix.
As the annealing time increased, the martensitic structure disappeared and the orthorhombic Zr3Fe precipitates and the bcc β-Nb particles were found as shown in Fig. 2 (a).
At an early stage before the 10-hour-anneal, the improved corrosion resistance would have resulted from the disappearance of the martensitic structure and the formation of the β-Nb particles.
When β-quenched, the martensitic structure (α') was formed by the rapid cooling rate.
Annealed at 570 o C for 2 hours after the β-quenching, the martensitic structure remained in the matrix.
As the annealing time increased, the martensitic structure disappeared and the orthorhombic Zr3Fe precipitates and the bcc β-Nb particles were found as shown in Fig. 2 (a).
At an early stage before the 10-hour-anneal, the improved corrosion resistance would have resulted from the disappearance of the martensitic structure and the formation of the β-Nb particles.