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Online since: November 2014
Authors: Zhen Yang, Xi Shang Dong, Huai Zhi Ma
Enlightened by FHAP and FCET theory, a potential crime location’s possibility of becoming a criminal’s selection can be divided into a number of grades.
The variable t represents the number of factors that influence the subjective factors or objective factors.
It may be too coarse-grained to simulate the factors’ effect on the criminal’s final decision.
Online since: October 2015
Authors: Aytalina A. Okhlopkova, Raisa V. Borisova, Tatyana A. Okhlopkova, Leonid A. Nikiforov
Relatively a few number of thermoplastics can be used for anti friction application.
There are huge number of researches about UHMWPE application as a polymer matrix for anti friction materials [5].
Gasek, Effects of quartz grain size distribution on the structure of porcelain glaze, Ceramics International. 40.8 (2014) 12045-12053
Online since: April 2018
Authors: Emanuele Cannella, Chris Valentin Nielsen
The new technologies are focused on the reduction of the sintering time and effects connected to grain growth because of the long sintering time, which is about 30 minutes and depending on the material.
A number of factors influence the friction, e.g. lubrication, compaction pressure, roughness of the tools and friction between particles [5].
A number of factors influenced the deviations between samples with the same lubricant.
Online since: September 2014
Authors: Bing Liang, Miao Miao Han, Li Bing Zhao, Hao Zhang, Qing Feng Zhang, Wei Min Zheng, Wen Shuang Wu, Ao Shu Meng
This article with sodium hexametaphosphate as the grinding agent, with reserves of 2.3 billion a hematite in Hebei province as an example to carry out the fine grain of lean hematite grinding efficiency, combined with grinding pulp viscosity, hematite surface potential index and the characteristics of adsorption mechanism of grinding aid are studied.
(serial number: Z201301) Supported by Hebei Province Natural Science Fund project.
(serial number: E2013209308) References [1] Gao Tai, Guo Xiaofei, Yuan Zhitao, etc.
Online since: June 2019
Authors: Anton A. Gnidenko
Introduction Titanium aluminide-based alloys (TiAl) have a number of attractive functional properties, such as low density, high strength at elevated temperatures, and enhanced crack resistance.
Tungsten in combination with boron improve the laminar structure of α2-phase (Ti3Al), providing resistance to grain coalescence [5].
The test results of the slab describing the γ-TiAl (111) surface had helped us to choose the number of atomic layers and the value of vacuum gap.
Online since: July 2013
Authors: Takehiro Konoike, Masahiko Kimura, Hirohisa Kimachi, Hiroshi Takagi, Chiharu Sakaki, Motonori Nakamura, Kaori Shirakihara, Kesisuke Tanaka
However, the number of cycles to crack initiation for the ferroelectric BST specimen was about three orders of magnitude smaller than that for the paraelectric specimen in spite of slow crack growth by domain switching.
Ec of PZT-A is 1.5 times higher than that of PZT-B in spite of the similar grain size, piezoelectric properties (ε33T/ε0, k31, and d31), and mechanical properties (Young’s modulus and bending strength) of the ceramics.
On the contrary, the fatigue life was more strongly influenced by the shortening effect of the microcracks in the case of the fatigue failure at a higher number of cycles.
Online since: April 2021
Authors: Sergey N. Khimukhin, Kseniia P. Eremina
A number of research methods for studying the phase composition allow concluding that the crystallite is an intermetallic compound of variable composition in the Nix-Aly-Fez system, additionally alloyed with Cr when using cathode No. 1.
Chemical elements content at the points of X-ray spectral analysis (Fig. 3) Point numbers Elements content at the points of analysis, at.% Fig.3, a Fig.3, b Al Fe Ni Al Si Cr Fe Ni 1 57.32 1.99 40.69 - 0.38 8.46 48.48 42.68 2 57.29 1.58 41.12 - 0.26 5.49 30.77 63.48 3 57.58 1.54 40.88 - - 4.34 25.03 70.63 4 57.97 1.31 40.72 - 0.29 8.93 52.85 37.93 5 57.71 1.27 41.02 - 0.35 4.64 26.82 68.19 6 57.32 1.85 40.83 - 0.28 4.90 28.85 65.98 7 57.34 1.70 40.96 - - 4.15 25.54 70.32 8 57.76 1.62 40.62 - - 1.81 11.94 86.25 9 57.92 1.48 40.60 3.00 - 1.50 9.35 86.14 10 58.21 1.47 40.32 3.59 - 1.46 8.64 86.32 11 57.86 1.36 40.78 3.45 - 1.43 8.75 86.37 12 57.58 1.27 41.15 0.90 - 1.41 8.82 88.86 13 57.90 1.09 41.01 5.91 - 1.23 7.42 85.45 14 - - - 3.81 - 1.23 7.81 87.16 15 - - - 1.61 - 1.30 8.07 89.02 16 - - - - - 0.83 7.95 91.22 Experiments conducted to study the data of electric spark coatings on heat resistance [18, 19] showed the necessity of using a sublayer.
However, the fine-grained structure of crystallites makes it is impossible to carry out reliable examination of the change in the elemental composition along their length.
Online since: March 2008
Authors: Wei Li, Liu Zhu Chen, Peng Sha Pang
Fig.2 EDS patterns of the sample A5 after hydrothermal synthesis Tab.1 Content of Ca and P in the sample A5 after hydrothermal treatment Part number O(%) P (%) Ca (%) Ti (%) Ca and P (%) Ca/P 1 54.25 16.32 27.79 1.64 44.11 1.70 2 58.75 1.76 2.10 37.39 3.86 1.19 Fig.3 shows the XRD patterns of the five samples (A1~A5) for detailed characterizing the microstructure of surface film after HT.
Contrast to the pattern before treatment, these diffraction peaks with diffraction angle (2θ) of 31.9°, 32.3° and 33.2° are identified as hydroxyapatite (Ca5(PO4)3(OH); PDF card number 86-0740).
Meanwhile, it is difficult to grow continued when the HA grain of growth is coarse enough, even if there is no any mechanical restrict force.
Online since: March 2009
Authors: Alexander S. Balankin, Orlando Susarrey Huerta, Maribel Mendoza Nuñez, Pedro A. Tamayo Meza
The mechanical behavior of crumpling network under the external force F is determined by the shape and volume dependence of network free energy XSU −=Φ , where U is the network internal energy, )(ln US Ω= is the Edwards entropy, )(UΩ is the number of microscopic inherent states of crumpling network corresponding to the given macroscopic energy U , and ( )FSUX ∂∂= / is the "configurational temperature" of crumpling network [3].
Folding mechanics Numerical simulations of forced folding with a coarse-grained model of triangulated self-avoiding surfaces with bending and stretching elasticity under the hydrostatic confinement force uF suggest that δ βδ κ κ             Ψ =      ∂ ∂ = R LL LR U F S u 2 , (3) where R is the characteristic size of folded configuration of square sheet of thickness h and edge size hL >> , Ψ and κ are the two-dimensional Young modulus and the bending rigidity of the sheet, respectively; ( 2 2 )/(/ hLL ∝Ψ= κγ is the dimensionless Föppl-von Kármán number), while δ and β are the scaling exponents [6].
Online since: December 2022
Authors: Xiao Song Li, Wu Yong Zhong, Rui Liao
However, in the untreated cast hypereutectic Al-Si alloy, there are a large number of thick strips, five petal star shaped primary silicon and long needle shaped eutectic silicon.
This is mainly because the addition of Co in the alloy forms the main intermetallic compound CoSi2, and the co atoms are dispersed in the matrix and precipitates in the form of solute elements, resulting in lattice distortion, increasing grain defects, improving the scattering ability of electrons, and significantly reducing the conductivity of the alloy.
Therefore, it is obvious that the conductivity (or resistivity) of binary Al-Si alloy will be greatly affected by the number of silicon phases in the microstructure.
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