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Online since: March 2024
Authors: Nurul Imani Istiqomah, Chotimah Chotimah, Leni Rumiyanti, Shania Garcia, Muhammad Mahfudz Fauzi Syamsuri, Ronius Marjunus, Edi Suharyadi
Silica produced from rice husk has finer grains than mineral silica, is renewable, and contains relatively high silica, which is more than 80% [7].
In the FT-IR spectra, there is a shift in the characteristic absorption of silicate material at wave numbers 1620 cm-1, 779 cm-1, and 462 cm-1, which is assumed to be BTA in silicate.
Online since: June 2008
Authors: L.F.F.T.T.G. Rodrigues, César A.C. Sequeira
This haze is probably related to the crystalline grain size and hopefully can be eliminated by changing the film deposition conditions.
The targeted goal for the number of quasi-reversible cyclic voltammograms (100,000 cycles) has been reached for our prepared PB systems deposited on Pt in the acidified solutions (pH ≅ 2).
Online since: July 2004
Authors: Roberto Martínez-Sánchez, Francisco Espinosa-Magaña, L. Bejar Gómez, Ivanovich Estrada-Guel, J.I. Barajas-Villaruel, C. Ornelas, G. Alonso
Transition metal sulfides (TMS) form a very important group of materials exhibiting a number of interesting properties.
Nanocrystalline state is responsible of a high volume of grain boundary, and because this is a high-energy region, favors the surface phenomena, like catalytic activity.
Online since: July 2011
Authors: Xin Wang, Shu Ying Yin, Li Jia Chen
All fatigue tests were run to the failure or separation of the specimens, and the corresponding cycling number was defined as low-cycle fatigue life Nf.
Meanwhile, the cyclic strain hardening behavior is also related to the obstructive effect of solute atoms, secondary phases, grain boundaries, phase boundaries and subgrain boundaries on dislocation motion.
Online since: July 2007
Authors: Hyoun Ee Kim, Jeong Taek Lee, Su Young Lee, Seong Joo Heo, Jai Young Koak, Seong Kyun Kim, Chong Hyun Han
The number in the parenthesis is the standard deviation Group 1 Group 2 Group 3 Group 4 Ra(�) 0.81(0.34)a 0.43(0.11)c 0.75(0.33)a,b 0.55(0.26)b,c Rq(�) 1.15(0.49)a 0.60(0.20)c 0.96(0.42)a,b 0.73(0.37)b,c Rz(�) 9.04(4.63)a 4.65(3.76)b 5.98(2.63)b 5.15(2.82)b a�b >c at P<0.05 In the SEM observations(Fig. 2), c.p.
HA/FA-coated ZrO2 implant and FAcoated ZrO2 implant show a micro-porous and rough coating structure with grain and pore size of several micrometers.
Online since: August 2011
Authors: Li Ming Yu, Yue Ma
Therefore, after heat treatment, the number and the intensity of the slip-able interfacial region would be reduced, and the corresponding interfacial relaxation effects would need a higher activation energy under the vibration load.
In fact, many kinds of interface relaxation effects (e.g. the relaxation effects of the grain boundary[19] and phase interface[20], the interface relaxation of the metal-matrix composites[21] and some viscoelastic polymer composites[22], etc) were manifested in peaks form in a suitable environment.
Online since: April 2005
Authors: Elena Landi, Anna Tampieri, Gian Carlo Celotti, Simone Sprio
Polarized samples immersed in SBF at 37 °C for times ranging between 16 and 192 h showed the formation of HA crystals onto the negatively charged surface, starting from a number of isolated grains which subsequently merge in large aggregates.
Online since: November 2011
Authors: Qiang Zhang, Yi Chu Yuan, Bei Zhi Li, Zhen Xin Zhou
In this paper , the grain was abstracted as an ideal cone with the top angle of 106°and the height of 0.12mm, while the work piece dimension was 4×3mm.
The number of elements along the direction of grinding depth was about 3 to 4, using the hourglass control method to control the excessive distortion of grids and selecting the reduced first-order linear and plane quadrilateral element for its high stability, shown as Fig.1 .
Online since: January 2012
Authors: Jian Lin Li, Jie Liu, Jian Cai, Lei Xiao, Shi Wei Luo
The lithologic characters in plant area are slightly weathered ash green banding mica marble and grey black medium-thick or thick fine-grained marble.
The finally determined network parameters are as follows: we assume that the learning rate of BP network is 0.906,the momentum factor is 0.906,the maximum training number is 3000,the error precision of network is 10-5.
Online since: August 2007
Authors: Young Seog Lee, S.I. Kim, D.W. Kim, Y.C. Yang, D.J. Paik, Shi Hoon Choi
To enhance the formability of the GA steel sheet, the previous works [1-5] focused on controlling several factors such as grain size, crystallographic orientation, temperature, coating thickness and phase composition of the intermetallic layer.
Those for the coating layer is 220E3[MPa], Length [mm] Thickness [µm] Number of elements Substrate 17 686 32445 Coating layer 17 4.667 3708 Cohesive element 17 2.333 1854 Table 2 Dimensions of substrate, layer and cohesive element � Coating layer Steel matrix Steel matrix Lower die Specimen Upper die 341[MPa] and 0.27, respectively.
Showing 24751 to 24760 of 28673 items