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Online since: June 2012
Authors: Tsugunori Kanada, Masato Enokizono, Yukihito Kido, Akifumi Kutsukake, Tetsu Ikeda
The difference is caused by the impedance difference, such as a number of turns and stray capacitance between windings.
In relation to this, it is reported that when a number of H coil winding decreases the twist of BH loop disappears [10].
Tegopolos : Comparison of Iron losses in Multiple Grain Size Iron Laminations under Sinusoidal and SPWM Excitation , Applied Electromagnetic Engineering , Vol. 670 , pp. 74-81 (2011) [5]S.
Online since: January 2014
Authors: Chang Zheng Sun, Xiao Ping Zhang, Qian Chen
In the experiment, the fiber volume content is 0.1%, by adding the early strength agent, retarder and fly ash and admixture, and cement sand ratio to make the cement matrix structure being close-grained, the early strength met the requirements.
Early strength mortar strength test results Serial number Cement sand ratio Fiber content (%) Cementitious materials Compressive strength (MPa) Flexural strength (MPa) Cement (%) Fly ash (%) 7d 28d 7d 28d 1 1 0 50 50 36.1 44.6 5.8 7.2 2 1 0.1 50 50 36.3 44.9 6.0 7.2 3 1 0.3 50 50 36.5 44.6 6.1 7.3 4 1 0.5 50 50 37.1 44.7 6.1 7.3 5 1 0.7 50 50 37.2 45.0 6.3 7.4 6 1 0.9 50 50 37.3 45.0 6.5 7.5 7 1 1.1 50 50 37.7 45.2 6.6 7.9 8 1 1.3 50 50 36.9 44.6 6.7 8.0 9 1 1.5 50 50 35.0 43.1 6.7 8.0 10 2 0 50 50 34.2 42.3 5.3 7.1 11 2 0.1 50 50 34.2 42.1 5.3 7.1 12 2 0.3 50 50 34.6 42.5 5.5 7.2 13 2 0.5 50 50 34.9 43.0 5.7 7.3 14 2 0.7 50 50 35.0 43.2 6.0 7.3 15 2 0.9 50 50 35.2 43.8 6.2 7.4 16 2 1.1 50 50 34.7 42.3 6.1 7.4 17 2 1.3 50 50 34.2 41.8 6.1 7.5 18 2 1.5 50 50 34.2 40.5 6.0 7.5 19 2.5 0 100 0 37.2 45.8 5.4 6.8 20 2.5 0.1 100 0 37.3 46.0 5.5 6.8 21 2.5 0.3 100 0 38.0 46.2 5.7 7.0 22 2.5 0.5 100 0 38.5 47.2 6.0 7.3 23 2.5 0.7 100 0 39.2 48.0 6.4 7.8 24 2.5 0.9 100 0 39.0 47.5 6.2 7.5 25 2.5
From the micro morphology of Figure 8, there were a small amount of Ca(OH)2 crystals, and a large number of hydrated calcium silicate gel flocculation.
Online since: October 2014
Authors: Andrzej Romanski, Janusz Konstanty, Dorota Tyrala
The Knoop hardness numbers and the proportion of (gFe) to (aFe) in the subsurface layer were evaluated during preparation of the metallographic specimens on surfaces ground on SiC #220 paper and again after final polishing with 1 mm diamond (Table 3).
Table 3 Densities, Knoop Hardness Numbers and Volume Percentages of Austenite (3) Material Milling time [hours] Density [g/cm3] KH0.5 V(gFe) (4) as-polished condition as-ground condition as-polished condition as-ground condition Fe-Ni-8 8 7.90 ± 0.09 258 ± 36 305 ± 50 83 12 Fe-Ni-120 120 7.62 ± 0.10 440 ± 18 442 ± 54 27 10 Fe-Mn-8 8 7.75 ± 0.01 298 ± 17 359 ± 35 73 63 Fe-Mn-120 120 7.61 ± 0.08 363 ± 31 391 ± 52 96 98 (3) scatter intervals estimated at 90% confidence level (4) estimated assuming that V(aFe) + V(gFe) = 100% (no account taken of other phases) Table 4 Bending Properties and Abrasion Resistance Indices of the Experimental Alloys (5) Material Milling time [hours] 3-point bending test Ai [mm/20m] TRS [MPa] OYS [MPa] epl [%] Fe-Ni-8 8 1161 ± 277 775 ± 178 2.0 ± 1.0 22.0 ± 3.1 Fe-Ni-120 120 584 ± 247 - 0.1 ± 0.1 39.1 ± 6.5 Fe-Mn-8 8 1325 ± 228 866 ± 41 2.2 ± 1.4 23.2 ± 4.3 Fe-Mn-120 120 1421 ± 65 1351 ± 155 0.8 ± 1.3 28.4 ± 5.4 Co-20%WC - - - - 33.6 ± 8.2 (5) scatter
The metallographic observations (Figs 3-5) reveal marked differences in grain size and microstructural inhomogeneity of the tested specimens.
Online since: July 2014
Authors: Li Jie Cui, Deng Ju Yao, Guang Yi Tang
It makes the business model of MDA consist of the fine-grained basic service model.
The SOA services interoperability features make itself more favorable to be reused in a number of occasions.
ACKNOWLEDGMENT This work was supported by the Natural Science Foundation of Heilongjiang Province under grant number No.F201313.
Online since: September 2019
Authors: A. Unt, Y.A. Bistrova, R.V. Mendagaliev, M.O. Gushchina, E.A. Shirokina
Fractograms of samples of selected fraction 45 -160 µm a) initial; b) secondary There is a large number of facets with a fine-grained structure with traces of plastic deformation, which indicates the viscous nature of the fracture concerning samples made frominitial powder.
The regimes Zd.1.3-1.4 revealed low rates due to low power and a high number of defects.
Online since: June 2021
Authors: Michał Kaczmarek, Ernest Stano
Build in numerical integration is used to determine the maximum values of the magnetic flux density according to the equation: Bm= 1z2SFeu2dt (5) us – the instantaneous value of the secondary voltage, z2 – are numbers of turns of the secondary windings, SFe - the surface area of the cross section of the magnetic core, lFe - the average magnetic flux path in the core.
The maximum value of the magnetic field strength is determined form equation: Hm= i1z1lFe (6) i1 - the instantaneous value of the primary current, z1 – numbers of turns of the primary winding.
Hamzehbahmani, Inter-laminar fault analysis of magnetic cores with grain-oriented electrical steels under harmonic distortion magnetisations, IET Sci.
Online since: February 2015
Authors: Emee Marina Salleh, Zuhailawati Hussain, Sivakumar Ramakrishan
A number of industries are focusing on the development of this special Mg alloys including i. aerospace application in order to minimize emission reduction and fuel efficiency, ii. medical application due to its high biocompatibility and self-degradable in human body and iii. electronic application since it exhibits great improvement in strength, heat transfer, and ability to shield electromagnetic interference and radio frequency interference as compared with current plastic counterparts [2].
This indicated that the formation of fine crystallite which is due to the increasing number of collisions per unit time during milling process.
The reduction of pore size and its distribution at higher speed increased the contact area between grains leading to enhance densification effect, sinterability and its properties afterward.
Online since: March 2020
Authors: Zeinab Abdel Hamid, H.B. Hassan, Manal A. Hassan, M. Hussein Mourad, S. Anwar
The effect of the number of cycles of SILAR on the morphology and size of the quantum dots has been investigated.
The effect of SILAR cycles number on the QDs size and band gap was studied.
Repeating the number of cycles enables the particles grow in a controlled manner.
The images revealed that the surface consisted of spherical grains and it had a smooth appearance.
The intensity of the peak increased with the number of cycles increasing.
Online since: August 2011
Authors: Hui Yong Guo, Wen Bo Huang, Wen Fang Li, Guo Ge Zhang, En Fu Wang
The results indicated that XRD pattern of the film matches with PDF No.00-040-1500 (tetragonal SrTiO3).This indicated that the film was mainly composed of tetragonal SrTiO3 grains. according to the XRD pattern, a small quantity of SrCO3 also likely existed.
With the increase of current density from 2A/cm2 to 3A/cm2, the number of cavities per unit area decreased, meanwhile, hole became bigger and more irregular.
As frequency was raised from 50Hz to 150Hz, the surface morphology became smoother and the number of cavities per unit area decreased, although some much bigger ones appeared on the surface.
Online since: January 2005
Authors: H. Srikanth, P. Poddar
Introduction Nanostructured materials are known to show a variety of novel electrical, thermal, mechanical, magnetic and optical properties as the grain size is reduced to the nanometer length scale.
A number of MR fluid samples were prepared with hydraulic oil as the fluid medium.
For the Hybrid MR fluid, the stem of each chain was very solid and dense with each stem being well separated with lesser number of pores inside the chain.
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