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Online since: February 2013
Authors: Shi Zhong Liu, Xiao Guang Wang, Jia Rong Li, Zhen Xue Shi
The as-cast microstructure of DD9 alloy showed in Fig. 1(a) exhibited a regular dendritic structure.
(a) (c) (b) (d) Figure 1 Microstructure of as-cast DD9 alloy: (a) dendritic structures, (b) γ/γ′ eutectic structures, (c) γ′ morphology at dendritic region, (d) γ′ morphology at interdendritic region The composition of the dendritic and interdendritic regions was determined by EDS.
The γ′ was the major strength phase and had face-centered-cubic structure.
Summary The as-cast microstructure of DD9 alloy exhibited a regular dendritic structure, and the primary and the secondary dendritic structure both were coarse.
Effect of heat treatments on phase chemistry of the nickel-base super-alloy SRR99[J].
Online since: January 2017
Authors: Jie Qiang Wang, Bing Qiang Cao, Hong Yan Xu, Teng Teng Wu, Wen Ru Li, Huan Qin Yu, Ting Zhai
It is commonly known, pure PANI is amorphous with small crystallization area and short-range order structure.
As shown in Fig. 3 (a) and (b), the surface of pure SnO2 porous nanosolids gas sensors almost have no crackle and nanoparticles connect to each other between mesh structure and keep porous structure.
Fig.3 (c) shows, most of the sensors’ surface PANI exist in aggregate structure, piling up PANI particles present ‘rock’ shape structure, which can size up to 15 microns or so.
As shown in (c) and (d), the obtained PANI material also has porous structure as SnO2.
Wang: Journal of Natural Gas Chemistry, Vol. 20 (2011), p. 515 [17] H.Y.
Online since: March 2024
Authors: Viacheslav Barsukov, Ilona Senyk, Oksana Butenko, Oksana Chernysh, Borys Haliuk, Yaroslav Kuryptia, Volodymyr Khomenko, Iryna Makyeyeva, Mirella Suchea, Emmanuel Koudoumas
Another case with non-thermal effects, where due to physical and biological processes, irreversible changes in the structures of DNA and cells can occur.
It has previously been reported that frequent use of a mobile phone can lead to degrading changes in the structure of the skin, which is a protective barrier.
They have proven themselves well in a wide range of protective structures that operate in the ultra-high frequency range (UHF).
Our research team has been working on the study of the influence of the structure and morphology of carbon materials on the shielding properties of composite polymeric materials.
The variety of dispersion and variability of fillers allows you to create a complex conductive structure in a composite material with many phase boundaries, and the addition of fibrous structures to the composite not only increases the electrophysical performance, but also reinforces the coating, which is very important for performance.
Online since: December 2011
Authors: You Lin Pan, Alain Kaloyeros, Barry Arkles, Eric Eisenbraun
The top layer was subjected to vacuum distillation: 191 g(yield:57.2%) of pale yellow liquid were obtained ; bp: 168-70 oC/0.2 mmHg; IR and NMR were consistent with the target structure.
Vacuum distilliation of the liquids gave 289.3 g(74.01%) of pale yellow liquid; bp: 148-50 oC/0.5 mmHg; IR and NMR were consistent with the target structure.
The dried organic layer was distilled through a Vigreux column. 32.6 g(49%) of slightly brown liquid was obtained at 101 oC/0.5 mmHg; IR and NMR were consistent with the target structure.
IR and NMR were consistent with the target structure.  
Publishing House “Chemistry” Moscow, 1985
Online since: October 2013
Authors: Hong He, Li Yun Song, Xiao Jun Liu, Zong Cheng Zhan, Xue Hong Zi, Wen Ge Qiu
ETS-4 with octahedral-tetrahedral structure has the potential properties different from the conventional zeolite materials [3].
Braunbarth et al. [5] had researched deeply on the structure of this titanosilicate, indicating that Sr2+ preferentially occupies one of the two cation sites in Na-ETS-4.
Park et al [12] and Ferdov et al. [13] recently found that the structure contraction when pretreated temperature and vacuum.
Compared with the ETS-4 structure dada reported by other published literature [3,15,16], the structure of the ETS-4, ETS-4-Sr and ETS-4-Ni synthesized in this paper were belong to the unique ETS-4 structure without any significant changes observed over the three samples.
In consequence, when the samples heated, structure contracted incongruently in the certain direction.
Online since: April 2014
Authors: R. Mahmoodi, S.M. Peighambari, M.G. Hosseini, Farzad Nasirpouri, Ekaterina V. Sukovatitsina, Alexey V. Ognev, Liudmila A. Chebotkevich, Alexander S. Samardak, Evgeny B. Modin, Maxim E. Stebliy
Nasirpouri3 1Laboratory of Thin Film Technologies, Far Eastern Federal University, Vladivostok, Russia 2Department of Physical Chemistry, University of Tabriz, Tabriz, Iran 3Faculty of Materials Engineering, Sahand University of Technology, Tabriz,Iran *email: samardak.as@dvfu.ru Keywords: Magnetic properties, magnetization reversal, nanoporous materials, nanowires Abstract.
It is sufficient to note magnetic configurations and reversal processes of nanosized structures.
Domain structure of single nanowire To understand physics of magnetization reversal mechanism we have studied the magnetic domain structure of single Ni nanowire with dw=40 nm and L=3.5um, Fig. 5(a).
Novel magnetic configuration observed in the bended single nanowire sends us a new challenge in the understanding of domain pattern formations in nanosized structures.
Vazquez, “Remanence of Ni nanowire arrays: Influence of size and labyrinth magnetic structure”, Phys.
Online since: December 2013
Authors: Hong Hua Liao
A new structure was designed to achieve the current detection of heater, the detection of temperature and the discrimination of flow direction.
Simultaneously, many new structures have been introduced to improve the conduct of flow sensors [7-8].
Combining the needs of scientific research task, a design scheme of high resolution, newly structured carrier gas flow velocity and flow direction sensor with MEMS technology is presented, and the related technical problems of sensor are discussed in the selenium content on-line detection system of low-voltage chip-CE and AFS.
Opekar, et al.: Analytical Chemistry , Vol. 74 (2002), p. 1968 [2] T.
Online since: February 2011
Authors: Wei Qiao Liu, Gong Li, Hui Juan Tong, Wei Ning Lei, Tong Ming Shang, Zheng Song Lou, Xiang Hong He
China 2School of Chemistry & Environmental Engineering, Jiangsu Teachers University of Technology, Changzhou 213001, P.
In the case of hydrothermal method [2], not only part of the ZSM-5 pore structure is retained, but also narrow pore size distribution of mesoporous (2~4 nm) is obtained.
Its skeleton and pore structure are similar to those of Al-SBA-15.
It can be seen that no peak is observed at 2θ=0.4º~5º, and the diffraction peaks of typical ZSM-5 crystal structure are found at 2θ=5º~60º.
This structure is conducive to the diffusion of reactants and products of alkylation of benzene with 1-dodecene, then help to improve the selectivity of LAB.
Online since: June 2019
Authors: Raffaella Dell’Aversano
The chemical structure of MDF composites makes these materials very sensitive to moisture exposure.
In addition, any chemical reactions between polymer and cement improve both the structure and the strength of the material [23].
In the present The structure of the MDF can be outlined as a continuous polymeric phase in which the dispersed cementitious phase is immersed.
Tan, Mechano-Chemical Aspect of the Prcessing/property/Structure Interactions in a Macro-Defect-Free cement, Adv.
Tan, Evolution of mechano-chemistry and microstructure of a calcium aluminate-polymer composite: Part II.
Online since: September 2016
Authors: D.K. Kostrin, A.A. Lisenkov
Compounds of carbon with hydrogen differ with nature of bonds, number of atoms in molecules and their structure.
The structure of crystallites of carbon-black differs from graphite in that parallel layers in it are offset from each other not regularly as in graphite, and chaotically, giving to crystallites unregulated three-dimensional structure.
The coating of ZrC has well created crystalline structure with preferential orientation [111] (Fig. 4).
Insignificant discrepancies show existence of defects in the created structure [12].
Tesner, Formation of carbon from hydrocarbons of a gas phase, Moscow, Chemistry, 1972