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Online since: March 2007
Authors: Da Li Mao, Si Xin Zhao, Wei Wang
Introduction
There are several schools of thought about bainite transformation. 1) Diffusional: The bainitic
ferrite nucleates at parent austenite grain boundary.
Under the assumption that the shape of the advancing interface is parabolic cylinder, the growth rates of a platelike precipitate can be approached by[8]: ( ) ( ) 0.5 0.5 0 1 0 2 1 ( ) 1 p c p e erfc p S v x x S γα π µ ρ ρ = Ω + − + (2) where p is the peclet number and equals to 2Cv D γ ρ in which ρ is the radius of advancing fronts, 0µ is the interfacial kinetic coefficient, 1S and 2S are functions of p and xγα is the carbon concentration at flat interface.
The concentration fields of new grain interact with each other at the late stage of proeutectoid ferrite transformation.
Under the assumption that the shape of the advancing interface is parabolic cylinder, the growth rates of a platelike precipitate can be approached by[8]: ( ) ( ) 0.5 0.5 0 1 0 2 1 ( ) 1 p c p e erfc p S v x x S γα π µ ρ ρ = Ω + − + (2) where p is the peclet number and equals to 2Cv D γ ρ in which ρ is the radius of advancing fronts, 0µ is the interfacial kinetic coefficient, 1S and 2S are functions of p and xγα is the carbon concentration at flat interface.
The concentration fields of new grain interact with each other at the late stage of proeutectoid ferrite transformation.
Online since: July 2012
Authors: Yu Ming Dong, Yi Qiu Tan
The use of crumb rubber modifiers with asphalt binders seems to enhance the fatigue resistance, as illustrated in a number of studies [5, 6, 7, 8].
Considering rubber grains distributed in CRM binder, the two mixtures are different from the passing percent of 4.75mm sieve size.
The rubber grain can be a fine aggregate in the CRM mixture.
Considering rubber grains distributed in CRM binder, the two mixtures are different from the passing percent of 4.75mm sieve size.
The rubber grain can be a fine aggregate in the CRM mixture.
Online since: June 2012
Authors: G.Q. Tan, Ao Xia, Li Hua Song, Wei Zhang, Hui Jun Ren
When NaOH concentration was over 0.6 mol/L, all the diffraction peaks and the Card Number PDF24-1224 were in accordance with the hexagonal phase Y(OH)3.
In the growing course of Y(OH)3, first, the Y(NO3)3 molecules were dissolved and hydrated, and the hexagonal phase Y(OH)3 crystal grains were obtained.
And as the alkali concentration was increased, the radial size of crystal grains turned larger and larger.
In the growing course of Y(OH)3, first, the Y(NO3)3 molecules were dissolved and hydrated, and the hexagonal phase Y(OH)3 crystal grains were obtained.
And as the alkali concentration was increased, the radial size of crystal grains turned larger and larger.
Online since: September 2003
Authors: Yu.A. Vodakov, M.S. Ramm, A.D. Roenkov, A.S. Segal, E.N. Mokhov, S.Yu. Karpov, Heikki Helava, Yu.A. Makarov
These crystals exhibited a domain structure with the single-crystal grains exceeding 10 mm in
dimension and the dislocation density locally less than ~104 cm-2.
Without the buffer, individual hexagonal sub-grains appeared on the surface resulting in the crystal quality degradation.
Journal Title and Volume Number (to be inserted by the publisher) 3 distribution in the powder (referred to in Fig. 4 as optimal conditions) is favorable for stable long-term source operation.
Without the buffer, individual hexagonal sub-grains appeared on the surface resulting in the crystal quality degradation.
Journal Title and Volume Number (to be inserted by the publisher) 3 distribution in the powder (referred to in Fig. 4 as optimal conditions) is favorable for stable long-term source operation.
Online since: July 2014
Authors: Zhi Feng Wang, Hai Bo Zhang, Yuan Fu Zhang, Chen Lin Hu
Influenced by tectonic background and global sea level rise, a set of deep water - fine grained sediments, mainly consisted of siliceous shales, cherts, carbonate rocks,are deposited during the formation of Wufeng formation in Late Ordovician[12].Early Silurian Longmaxi formation is mainly black shale deposited in deep water shelf environment.
Fine outcrops and some drillings provides a number of basic data in this study.
The organic matters type of Longmaxi shale Prospects of Shale Gas Exploration Longmaxi Formation shale is a set of siliceous clastic fine grained sediment, depositing in the deep-water shelf environment, it is the product of transgressive systems tracts,the stable deep-water sedimentary environment makes Longmaxi Formation shale’s thickness larger, plane distribution is stable, the thickness of the black shale is about 20-120 meters.
Fine outcrops and some drillings provides a number of basic data in this study.
The organic matters type of Longmaxi shale Prospects of Shale Gas Exploration Longmaxi Formation shale is a set of siliceous clastic fine grained sediment, depositing in the deep-water shelf environment, it is the product of transgressive systems tracts,the stable deep-water sedimentary environment makes Longmaxi Formation shale’s thickness larger, plane distribution is stable, the thickness of the black shale is about 20-120 meters.
Online since: November 2014
Authors: Elena Mavropoulos, Andrea Machado Costa, Moema Hausen, Marcelo N. Tanaka, Jessica Dornelas, Ana Paula Moreira Duarte, Gloria A. Soares, Marcia S. Sader, Alexandre Rossi
Table 1: Estimative measurements by UV-Vis of HI adsorbed on β-TCP sintered powder
Initial insulin concentration (mg.mL-1)
Insulin mg/g on β-TCP
0.5
Bellow detection
1.0
Bellow detection
1.5
14.0 ± 2.0
2.0
9.7 ± 2.0
The SEM micrograph (Fig. 3a) showed a dense structure and AFM 3D image of sintered grains (Fig. 3b) presented a homogenous discs surface.
a b Figure 3: SEM micrograph (a) and AFM 3D image of sintered grains (b) of β-TCP disc surface The surface wettability is important parameters which affect the biological response to an implanted material [2].
Additionally, total cell number was quite higher on β-TCP-PB as compared to β-TCP-HI.
a b Figure 3: SEM micrograph (a) and AFM 3D image of sintered grains (b) of β-TCP disc surface The surface wettability is important parameters which affect the biological response to an implanted material [2].
Additionally, total cell number was quite higher on β-TCP-PB as compared to β-TCP-HI.
Online since: April 2015
Authors: E.M. Vodopyanov, Anna V. Loginova, N.V. Martyushev, Aleksander S. Ivashutenko
A certain ceramics density decline sintered at 1750°С is specified by the concentration grade growing of dioxide zirconium monoclinic phase due to the recrystallization growth of grains.
Ceramics and Titanium cermet density at different sintering temperatures Number Sample Density*, [gr/cm3] 1550 °С 1600 °С 1650 °С 1700 °С 1750 °С 1 CZC 4.03 4.80 4.81 4.94 4.84 2 OC-1,25 4.72 4.72 4.69 4.55 samples melted 3 OC-2,5 4.67 4.64 4.37 3.85 *For studied compositions the ceramics theoretical density equals 5.03 gr/cm3.
Therefore, the recrystallization growth of grains must be significantly decelerated in the issue of sintering activation energy reduction and a low motion speed of phase boundaries.
Ceramics and Titanium cermet density at different sintering temperatures Number Sample Density*, [gr/cm3] 1550 °С 1600 °С 1650 °С 1700 °С 1750 °С 1 CZC 4.03 4.80 4.81 4.94 4.84 2 OC-1,25 4.72 4.72 4.69 4.55 samples melted 3 OC-2,5 4.67 4.64 4.37 3.85 *For studied compositions the ceramics theoretical density equals 5.03 gr/cm3.
Therefore, the recrystallization growth of grains must be significantly decelerated in the issue of sintering activation energy reduction and a low motion speed of phase boundaries.
Online since: July 2015
Authors: Triyono Triyono, Yustiasih Purwaningrum, Muhammad Fathan
The grain size of HAZ was smaller than base metal, because of the welding heat input effect.
Ferrite and pearlite appeared in HAZ and base metal, but the HAZ grain size was smaller.
In the carbon steel SS400, weld metal had higher hardness number than the base metal and HAZ due to bainite microstructure. 3.
Ferrite and pearlite appeared in HAZ and base metal, but the HAZ grain size was smaller.
In the carbon steel SS400, weld metal had higher hardness number than the base metal and HAZ due to bainite microstructure. 3.
Online since: January 2012
Authors: Da Zhou Zhu, Hua Zhang, Bai Yu Wu, Rui Feng Hou, Da Yu Pan, Kun Bi, Cheng Wang
Values for the dielectric properties of a number of products, including grain and seed, fruits and vegetables, and poultry products, depend on frequency, moisture content, and temperature. [5] [6].
Free-space measurement of dielectric properties of cereal grain and oilseed at microwave frequencies.
Free-space measurement of dielectric properties of cereal grain and oilseed at microwave frequencies.
Online since: August 2013
Authors: Hong Mei Zhang, Yang Gao
The principal component can compress a certain number of variables into several separate components, in order to reduce mutual interference among the variables.
According to the principal components analysis and the data collected in Hefei city, the data from 1998 to2009 were chosen as the bases, and nine affecting factors were selected, including:X1- the total population (10000 persons),X2- agricultural population(10000 persons), X3- gross domestic product (100 million yuan), X4- the second the tertiary industry product (100 million yuan), X5- total grain output(kg), X6-total agricultural product(100 million yuan), X7- grain yield per ha (kg/ha), X8- increase investment in fixed assets (100 million yuan), X9- per capita road area(m2),Y- area of cultivated land (ha).
According to the principal components analysis and the data collected in Hefei city, the data from 1998 to2009 were chosen as the bases, and nine affecting factors were selected, including:X1- the total population (10000 persons),X2- agricultural population(10000 persons), X3- gross domestic product (100 million yuan), X4- the second the tertiary industry product (100 million yuan), X5- total grain output(kg), X6-total agricultural product(100 million yuan), X7- grain yield per ha (kg/ha), X8- increase investment in fixed assets (100 million yuan), X9- per capita road area(m2),Y- area of cultivated land (ha).