Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: April 2012
Authors: Guido Schmitz, Andriy Gusak, Nadiya Storozhuk
Theories of flux-driven coarsening (Flux-Driven Ripening and Flux-Driven Grain Growth) had been suggested by one of present authors (AMG) together with King Ning Tu [5-6].
The flux of clusters in the size space is given by combination of the diffusion and drift terms: (a), , (b) (2a, b) with f being a number of clusters the size of n per a unit volume of a system.
Let be an area of interfaces i/A and i/B, – atomic volume in the IMC-phase, so that is a number of atoms of IMC.
The flux of clusters in the size space is given by combination of the diffusion and drift terms: (a), , (b) (2a, b) with f being a number of clusters the size of n per a unit volume of a system.
Let be an area of interfaces i/A and i/B, – atomic volume in the IMC-phase, so that is a number of atoms of IMC.
Online since: December 2014
Authors: Jörg Neumeyer, Egbert Baake, Aleksandr Nikanorov
An induction seam annealing installation can be integrated in the welding line to achieve a homogeneous grain structure on the whole circumference.
High-frequency alternating current offers a number of benefits as energy source for generating the heat required for the welding process.
Fig. 3 Algorithm of transient coupled electromagnetic-thermal analysis with the tube movement For numerical simulation the continuously running physical heating process is replaced by big enough number of time steps.
High-frequency alternating current offers a number of benefits as energy source for generating the heat required for the welding process.
Fig. 3 Algorithm of transient coupled electromagnetic-thermal analysis with the tube movement For numerical simulation the continuously running physical heating process is replaced by big enough number of time steps.
Online since: December 2019
Authors: Svetlana V. Samchenko, Yury R. Krivoborodov
Despite the large number of works aimed at improving the efficiency of cement stone hardening, the problem of controlling the hardening of cement is relevant.
The degree of hydration of cement with additives Curing time, days The degree of hydration, [%] PC control sample With an additive 1 [CaO + Al2(SO4)3] With an additive 2 [Ca(OН)2 + Al2(SO4)3] 1% 3% 5% 1% 3% 5% 3 days 62 65.4 68.2 70.5 63.6 67.4 70 28 days 68.7 71.1 73.5 81.4 71.4 75.4 77 An increase in the hydration rate is due to a decrease in the shielding effect of hydrated shells on cement grains due to the growth of new growth crystals on crystallization substrates in the space between particles, as well as the rapid removal of hydration products from the reaction sphere.
As a result, the density and the number of contacts between individual hydrates increase, which contributes to a decrease in the porosity of the cement stone.
The degree of hydration of cement with additives Curing time, days The degree of hydration, [%] PC control sample With an additive 1 [CaO + Al2(SO4)3] With an additive 2 [Ca(OН)2 + Al2(SO4)3] 1% 3% 5% 1% 3% 5% 3 days 62 65.4 68.2 70.5 63.6 67.4 70 28 days 68.7 71.1 73.5 81.4 71.4 75.4 77 An increase in the hydration rate is due to a decrease in the shielding effect of hydrated shells on cement grains due to the growth of new growth crystals on crystallization substrates in the space between particles, as well as the rapid removal of hydration products from the reaction sphere.
As a result, the density and the number of contacts between individual hydrates increase, which contributes to a decrease in the porosity of the cement stone.
Online since: January 2014
Authors: Xiao Guang Zhao, Bo Tang
The farmers suffered economic loss of tens of thousands Yuan every year; In Wanghuageda village of Yongxing office more than 26.8 hm2 of irrigated land became wastelands, and half of the mountain lands only“grew grass instead of grain”.
Planning on the (set) the mining numbers are 23 [5]
By the end of 2007, the area has been set up 58 mining areas and cumulative ascertain reserves of 50.98 billion tons of coal resources, coal reserves of 4.75 billion tons, the planning on the (set) the mining numbers are 10 [5]
Planning on the (set) the mining numbers are 23 [5]
By the end of 2007, the area has been set up 58 mining areas and cumulative ascertain reserves of 50.98 billion tons of coal resources, coal reserves of 4.75 billion tons, the planning on the (set) the mining numbers are 10 [5]
Online since: January 2013
Authors: Yong Sheng Ma, Lin Tong Wang, Xian Hui Sun, Liu Ying Li, Jie Sun, Rong Qi Song
Introduction
Soybean protein hydrolysis process because of protease often cause protein hydrolysate of browning, because the soybean protein hydrolysis into peptide process often to be accompanied by a large number of pigment material formation, formation of oligopeptides mixture present a dark brown and dark brown.
But, activated carbon to add the more quantity by adsorption of protein are also more, resulting in a large number of protein loss, bring the economic benefit of the loss.
Grain&Oil Processing and Food Machinery Vol. 36 (2004), p. 46 In Chinese
But, activated carbon to add the more quantity by adsorption of protein are also more, resulting in a large number of protein loss, bring the economic benefit of the loss.
Grain&Oil Processing and Food Machinery Vol. 36 (2004), p. 46 In Chinese
Online since: December 2014
Authors: Lu Ying Qiu, Long Gui Peng, Guo Qiang Duan, Ce Wang
The reaction temperature is higher, the greater of the polymerization rate increasing ,the number of polyaniline particles was increasing and the average particle size decreases. which will due to the high reaction temperature, the high rate of radical generation , so that the free radical concentration increased in water , resulting from the diffusion rate of radical from water to layers increased, so the nucleation rate increased, it can generated more latex particles, so the increase in the number of particles of polyaniline, particle size decreases.
(2) Analysis of grain of copper ions-polyaniline load montmorillonite.
(2) Analysis of grain of copper ions-polyaniline load montmorillonite.
Online since: March 2013
Authors: Shu Hua Liang, Lu Pei, Jun Tao Zou, Xian Hui Wang, Yan Feng Liu
Due to very close atomic radius, the lattice type, lattice constants and atomic number of outer electrons for copper and iron [12], copper have good metallurgical compatibility with steel during bonding process.
From Fig.1(c), a curly diffusion layer can be obviously seen, and there are tiny cracks along grain boundary of CuMn20 alloy.
Physical and chemical properties of four elements Element Melting point (℃) Density (g·cm-3) Atomic number Atomic radius (10-10m) electronegativity Binding energy (kJ/mol) Crystal structure Cu 1083 8.96 29 0.128 1.90 336 fcc Fe 1535 7.86 26 0.127 1.83 413 α-bcc γ-fcc Mn 1244 7.21 25 0.131 1.55 282 α/δ-bcc γ-fcc Ni 1455 8.908 28 0.124 1.91 428 fcc As seen from Table 1, Fe has the highest melting point and much larger binding energy than that of Cu and Mn, indicating that Fe diffusion activation energy is far above that of Cu and Mn.
From Fig.1(c), a curly diffusion layer can be obviously seen, and there are tiny cracks along grain boundary of CuMn20 alloy.
Physical and chemical properties of four elements Element Melting point (℃) Density (g·cm-3) Atomic number Atomic radius (10-10m) electronegativity Binding energy (kJ/mol) Crystal structure Cu 1083 8.96 29 0.128 1.90 336 fcc Fe 1535 7.86 26 0.127 1.83 413 α-bcc γ-fcc Mn 1244 7.21 25 0.131 1.55 282 α/δ-bcc γ-fcc Ni 1455 8.908 28 0.124 1.91 428 fcc As seen from Table 1, Fe has the highest melting point and much larger binding energy than that of Cu and Mn, indicating that Fe diffusion activation energy is far above that of Cu and Mn.
Online since: January 2012
Authors: Yasuo Marumo, Li Qun Ruan, Masafumi Noda, Yoshihito Kawamura
Microstructure observation
The number in figure 5 means the position in the micrograph where we investigated the
microstructure of deformed specimen.
"Observation point (from 1-4)" in Figure 7 means the position of micrographs were taken from the number in Figure 5.
On the other hand, it is thought that complete dynamic recrystallization is not obtained inside of the material because the processing time is not sufficient, only with the magnitude of several seconds, and the unrecrystallized grain etc. remain, and is thought that bigger flow stress was shown by the influence of the high-velocity deformation and the crystalline texture for 100mm/min at the compression speed.
"Observation point (from 1-4)" in Figure 7 means the position of micrographs were taken from the number in Figure 5.
On the other hand, it is thought that complete dynamic recrystallization is not obtained inside of the material because the processing time is not sufficient, only with the magnitude of several seconds, and the unrecrystallized grain etc. remain, and is thought that bigger flow stress was shown by the influence of the high-velocity deformation and the crystalline texture for 100mm/min at the compression speed.
Online since: January 2012
Authors: Soshu Kirihara, Youhei Takinami, Satoko Tasakai, Noritoshi Ohta
In this optical device, the aluminium micro mirrors of 14 μm in edge length were assembled with 1024 × 768 in numbers.
Dense alumina microstructure was formed, and the average grain size was approximately 2 µm.
These numbers of the structural periods were optimized to obtain the clear localized modes with the sharp resonation peaks in the band gaps.
Dense alumina microstructure was formed, and the average grain size was approximately 2 µm.
These numbers of the structural periods were optimized to obtain the clear localized modes with the sharp resonation peaks in the band gaps.
Online since: September 2018
Authors: Mikhail Kholodnyak, Anatoliy I. Shuyskiy, Sergey Stel'makh, Evgeniy Shcherban'
The efficiency of a dispersed concrete reinforcement with the help of a polymeric micro-fiber is a variable value defined by a number of parameters: fiber length and diameter, polymer modulus of elasticity as well as the number of fibers in a concrete mixture volume unit.
Physical and Mechanical Crushed stone Properties Name of indicators Relevant indicators Content of dusty and clay particles, %, weight 0.96 Clay content in lumps, %, weight Fraction 5-10 - Fraction 10-20 - Content of platelike (flaky) and needle-shaped grains Fraction 5-10 43.0 Fraction 10-20 41.0 Crushability, % by weight Fraction 5-10 10.2 Fraction 10-20 9.9 Fig. 6.
Physical and Mechanical Crushed stone Properties Name of indicators Relevant indicators Content of dusty and clay particles, %, weight 0.96 Clay content in lumps, %, weight Fraction 5-10 - Fraction 10-20 - Content of platelike (flaky) and needle-shaped grains Fraction 5-10 43.0 Fraction 10-20 41.0 Crushability, % by weight Fraction 5-10 10.2 Fraction 10-20 9.9 Fig. 6.