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Online since: December 2011
Authors: Ming Kai Zhou, Xiao Chen, Zhan Ao Liu
What’s more, while a number of studies have been conducted on high strength flowing concrete, there are few instances concerning LHC, especially the LHC prepared by MS.
Man-washed granite MS containing 0.8% fines and successive grading granite crushed stone(CS) with maximum grain size of 40mm were used as aggregates.
Online since: November 2005
Authors: Seock Sam Kim, Xiao Jing Xu, Y.S. Zheng
It is also worth noting in Fig. 4 that the fracture surfaces of the enhanced solution treated 2024Al alloy presents no overheated microstructure such as melting, oxidation or coarse grain which is often associated with intergranular fracture mode.
At the 24h artificial aging state, the enhanced solution treated 2024Al alloy still maintains the capability to precipitate fine second phase, while the conventional solution treated 2024Al alloy has presented over aging, a state in which fine second phase is coarsened in size and reduced in number, so when the artificial aging time increases from 8h to 24h, the enhanced solution treated 2024Al alloy exhibits a much lower decrease in both strength and ductility than that of the conventional solution treated 2024Al alloy.
Online since: September 2013
Authors: Zhao Qian Xie, Yu Feng Lu, Miao Lou, Meng Zhou, Xin Dong Hu, Fei Lu
Along with the corrosive medium continuous diffusion, the coating inside a large number of active points have reaction with corrodent.
Their grain are tiny, often absorbed on the surface of the coating.It is good to jamming coating own porosity, effectively cutting corrosion medium’s fast channel.
Online since: August 2005
Authors: P. Vena, D. Gastaldi, R. Contro
In the graded ceramics, the thermal stresses are due to both the mismatch of the mean Coefficient of Thermal Expansion (CTE) between the layers, and to the CTE mismatch between the Alumina and the Zirconia grains within each lamina [1, 2].
Both the sequences exhibited a tensile stress of about 800 MPa in the central layer (layer number 5).
Online since: April 2010
Authors: Poonam Sharma, Hardev Singh Virk
A number of synthetic routes have been used to synthesize CdO nanoparticles and nanowires [9-11].
Choudhury, Irradiation induced grain growth and surface emission enhancement of chemically tailored ZnS : Mn/PVOH nanoparticles by Cl+9 ion impact, Bull.
Online since: June 2007
Authors: I.A. Adejumobi, A.A. Esan, A.B. Okunuga
These cottage industries include among others, gari processing, palm kernel/oil processing, tuber powders, grain processing, dehydrated okro, dehydrated and frozen fish etc.
This number of sites is small out of many possible sites, as the country is blessed with so many streams and rivers suitable for the schemes.
Online since: October 2011
Authors: Wen Chang Tsai, Bill Chen
They must be of multiples of 4, with a recommended minimum number of 12 strips.
[5] Wen-Chang Tsai, “Core Losses of Grain-oriented and Non-oriented Steel Specimens Excited by Sinusoidal, Square-wave and Sinusoidal PWM Voltage,” International Forum on Systems and Mechatronics, pp. 413-419, Dec. 2008.
Online since: July 2021
Authors: Rudolf Hela, Jiří Brožovský, Dimitrii Gusak
The reaction’s sequence (development) of system "alkali metal hydroxide – silicic acid (silicates)" is presented on the Fig. 1. and can be described by the following chemical reactions: Na2SO4 + Ca(OH)2 + 2H2O → CaSO4 ⋅ 2H2O + 2NaOH 2NaOH + SiO2 + nH2O → Na2SiO3 ⋅ nH2O ↓ metal silica gel and the reaction can subsequently continue as follows: Na2SiO3 ⋅ nH2O + Ca(OH)2 + nH2O → CaSiO3 ⋅ nH2O + 2NaOH Fig. 1 Representation of reaction "alkali metal hydroxide - silicic acid" It has been found [1], that the aggregate grain from 0.18 to 0.6 mm which contain reactive SiO2 has a maximum value of extension in alkali silica reaction of aggregate in the concrete.
Table 1 Results of the ultrasonic pulse measurements Measurement number Ultrasonic pulse velocity V [km/s] R25 KV25 R40 KV40 0 4.114 4.078 4.107 4.089 1 4.214 4.184 4.211 4.205 2 4.268 4.163 4.181 4.030 3 4.258 4.148 4.178 4.013 4 4.236 4.166 4.150 4.039 5 4.187 4.168 4.161 4.040 6 4.164 4.175 4.175 4.029 7 4.154 4.168 4.195 4.020 8 4.137 4.143 4.147 3.974 9 4.122 4.133 4.146 3.967 10 4.119 4.133 4.134 3.952 11 4.117 4.132 4.111 3.940 12 4.115 4.128 4.092 3.930 13 4.111 4.125 4.086 3.925 14 4.107 4.110 4.084 3.913 15 4.083 4.091 4.070 3.908 16 4.077 4.084 4.057 3.877 17 4.067 4.074 4.053 3.869 18 4.066 4.075 4.046 3.857 19 4.064 4.074 4.007 3.804 20 4.034 4.060 3.951 3.744 21 4.011 4.066 3.842 3.747 22 4.031 4.062 3.913 3.694 23 4.008 4.038 3.927 3.730 Fig. 2 Waveform of ultrasonic pulse propagation velocity Electron scanning microscopy.
Online since: April 2012
Authors: Shaari Abdul Halim, Zainuddin Zalita
The number of diffraction peaks, the peaks relative intensities and width vary slightly when Ti content is increased.
Two empirical equations are used to fit the resistivity data in the metallic region at lower temperature (T < Tp), to explain the nature of electronic transport, which are r(T) = r01 + r1T 2 (1) r(T) = r02 + r2T 2.5 (2) where r0 the is resistivity due to the domain, grain boundary and other temperature independent scattering mechanism. r1T2 is the electrical resistivity causes by the electron-electron scattering process and r2T2.5 arises due to the electron-magnon scattering process [8].
Online since: January 2005
Authors: Dong Bok Lee, J.H. Ko
This happens frequently, when the marker size is considerably larger than the oxide grains.
Because of the high atomic number, Ni shows up as white.
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