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Online since: October 2009
Authors: Mamoru Omori, Toshiyuki Hashida, Hisamichi Kimura, Go Yamamoto
We can see that the nanodefects density, namely the number of nanodefects per unit of MWCNT
surface area increases with the increasing treatment time.
Hereafter, the number of nanodefects per unit of the MWCNT surface area is referred to as the nanodefect density.
Figures 4(a) and 4(b) show the microstructure of the fracture surface of the 1.9 vol.% pristine and 1.9 vol.% acid-treated MWCNT/alumina composite, respectively From Figs. 4(a) and 4(b), the shape of alumina grains were clearly observed from the fracture surface, indicating that the fracture of both the composites occurred along the grain boundaries, that is, intergranular fracture mode.
Hereafter, the number of nanodefects per unit of the MWCNT surface area is referred to as the nanodefect density.
Figures 4(a) and 4(b) show the microstructure of the fracture surface of the 1.9 vol.% pristine and 1.9 vol.% acid-treated MWCNT/alumina composite, respectively From Figs. 4(a) and 4(b), the shape of alumina grains were clearly observed from the fracture surface, indicating that the fracture of both the composites occurred along the grain boundaries, that is, intergranular fracture mode.
Online since: May 2011
Authors: Yan Bin Gao, Zhi Quan Huang, Jiang Feng Wang, Yong Le Li
Block samples have been numbered respectively BS4-1, BS4-2.
Sample numbers is 4-1-2 4-1-1, respectively.
So just exerted a load, even if the small load, its variation will reach maximum and make granules close-grained.
The structure is destroyed, behavior between grains close to reconstituted clays, compression index diminishes quickly, around 225kPa later gradually slow, and curves tend to be remolded soil curves, as shown in the e-lgp until compress curve last superposition.
Sample numbers is 4-1-2 4-1-1, respectively.
So just exerted a load, even if the small load, its variation will reach maximum and make granules close-grained.
The structure is destroyed, behavior between grains close to reconstituted clays, compression index diminishes quickly, around 225kPa later gradually slow, and curves tend to be remolded soil curves, as shown in the e-lgp until compress curve last superposition.
Online since: May 2014
Authors: Joseph W. Newkirk, F. Frank Liou
There are a number of advanced materials that could be readily produced by AM and fabricated into a useful part.
The following list represents a number of possibilities based on the unique features of AM.
However, there have been successful application of this systems as a number of compatible pairs are available.
Fig 1: Microstructure of Al0.3FeCoCrNi1.7 with columnar grains of length > 1mm.
This work was partially funded through NASA, under grant numbers NRA NNX11AI73A and NNX13AM99A NSR 475489.
The following list represents a number of possibilities based on the unique features of AM.
However, there have been successful application of this systems as a number of compatible pairs are available.
Fig 1: Microstructure of Al0.3FeCoCrNi1.7 with columnar grains of length > 1mm.
This work was partially funded through NASA, under grant numbers NRA NNX11AI73A and NNX13AM99A NSR 475489.
Online since: December 2021
Authors: Evgenii Kalashnikov, Igor Tolstikhin
Model
It is assumed that the number of helium atoms in the water captured of pore is so small that they do not interact with each other.
To reveal the potential energies UΓ,ξn, βαcξn-ξn-1βξn+1-ξnβ, UΖ,Γ,ξn from Eqn. (1) and defects, the approximation of local (virtual) chains is used [2].The number of these chains ∙∙On-2On-1HeOnOn+1∙∙; ∙∙∙On-1OnHeOn+1On+2∙∙; ∙∙∙On-2On-1HeOn+1On+2∙∙ (2) is equal to the number of ways of interaction (connections) a helium atom with its nearest neighbors.
[But increasing the number of water molecules in the bonds Eqn (3a) during pore formation and water filling requires increasing the pore volume.
Accordingly, the same ambiguity will manifest itself in the diffusion coefficient]. 4..Crystal with empty pores and pores filled with water In general, a real quartz crystal, as noted above, contains grains containing a crystal lattice, intergranular boundaries, and pores with and without water.
The numbers k,l,m (Fig.1a) are any real non-negative numbers.
To reveal the potential energies UΓ,ξn, βαcξn-ξn-1βξn+1-ξnβ, UΖ,Γ,ξn from Eqn. (1) and defects, the approximation of local (virtual) chains is used [2].The number of these chains ∙∙On-2On-1HeOnOn+1∙∙; ∙∙∙On-1OnHeOn+1On+2∙∙; ∙∙∙On-2On-1HeOn+1On+2∙∙ (2) is equal to the number of ways of interaction (connections) a helium atom with its nearest neighbors.
[But increasing the number of water molecules in the bonds Eqn (3a) during pore formation and water filling requires increasing the pore volume.
Accordingly, the same ambiguity will manifest itself in the diffusion coefficient]. 4..Crystal with empty pores and pores filled with water In general, a real quartz crystal, as noted above, contains grains containing a crystal lattice, intergranular boundaries, and pores with and without water.
The numbers k,l,m (Fig.1a) are any real non-negative numbers.
Online since: June 2013
Authors: Pedro Manuel Calas Lopes Pacheco, Mauricio Rangel Pacheco
The WNZ experiments extensive plastic strain and softening, and usually results in a fine equiaxed grain recristallized structure.
The TMAZ experiments a lower level of plastic strain and is a relative small region surrounding the WNZ with a distorted grain structure.
Although there are a considerable number of references in experimental works related to FSW process, relatively, a reduced number references on modeling and numerical simulation of the process are available.
The TMAZ experiments a lower level of plastic strain and is a relative small region surrounding the WNZ with a distorted grain structure.
Although there are a considerable number of references in experimental works related to FSW process, relatively, a reduced number references on modeling and numerical simulation of the process are available.
Online since: January 2022
Authors: R.N. Yastrebinskii, A.A. Karnauhov
Introduction
Materials intended for the radiation protection of nuclear power plants (NPP) must have a number of specific properties.
As a detector, a scintillator is used in the form of a disc, which is a solid suspension of ZnS{Ag} grains in a hydrogen-containing medium; - Radiometer-dosimeter MKS-01R with a BDKN-03 detection unit was used to measure the density of thermal neutrons (Ff) streams and the density of the total neutron flux (Fint+f).
As a detector in the BDKN-03 block, a SFL5-6 light-stage base is used, which is a mixture of lithium fluoride with ZnS{AG} grains, which is dispersed in the disc from the plexiglass
Acknowledgments The reported study was funded by RFBR, project number 19-38-90024.
As a detector, a scintillator is used in the form of a disc, which is a solid suspension of ZnS{Ag} grains in a hydrogen-containing medium; - Radiometer-dosimeter MKS-01R with a BDKN-03 detection unit was used to measure the density of thermal neutrons (Ff) streams and the density of the total neutron flux (Fint+f).
As a detector in the BDKN-03 block, a SFL5-6 light-stage base is used, which is a mixture of lithium fluoride with ZnS{AG} grains, which is dispersed in the disc from the plexiglass
Acknowledgments The reported study was funded by RFBR, project number 19-38-90024.
Online since: October 2017
Authors: Martin Boháč, Dana Kubátová
The quicklime with grain size 0-22.4 mm was prepared in a (semi-industrial) rotary kiln.
A layer of C-S-H phases is formed on quartz grains.
The use of finer lime fraction (0-1 mm) samples causes growth of the pores sized 375-500 nm, while lime fraction 11.2-22.4 mm results in less number of pores sized ca. 375 nm.
The number of particle interaction in fresh lime putty is the determining factor for its yield stress and plastic viscosity.
A layer of C-S-H phases is formed on quartz grains.
The use of finer lime fraction (0-1 mm) samples causes growth of the pores sized 375-500 nm, while lime fraction 11.2-22.4 mm results in less number of pores sized ca. 375 nm.
The number of particle interaction in fresh lime putty is the determining factor for its yield stress and plastic viscosity.
Online since: October 2008
Authors: Claudio Testani, Roberto Montanari, T. Valente, Riccardo Donnini, Paolo Deodati
Another factor contributing the stability of the mechanical properties after long-term heat
treatments is grain size which substantially does not change.
The results of fatigue tests are displayed in Fig. 7; they show that the heat treatments at 600 °C produce a progressive reduction of the number of cycles to failure Nf as the exposure time increases.
( ) fff �A α ε =max (2) ( ) ( ) mm fm f ult m �B� E A β ασ ε + =max (3) Heat treatment Mean thickness (µµµµm) As-fabricated 0,85 400 °C, 100 hours 0,86 400 °C, 500 hours 0,95 400 °C, 1000 hours 0,98 600 °C, 100 hours 0,94 600 °C, 500 hours 0,97 600 °C, 1000 hours 0,98 being εmax the maximum deformation imposed to the probe, σult and E the ultimate tensile strength and the Young's modulus of the matrix, Nf the number of cycles to failure, αf, αm, βm, Af, Am and Bm parameters to determine by the statistical regression analysis.
The stability of fibrematrix interface and of grain size guarenteed to the composite material to maintain its original mechanical properties upon prolonged heat treatments. 3 - Fracture surfaces show plastic deformation of the matrix and pull-out of fibres, i.e. a correct load transfer from the matrix to the fibres. 4 - SEM observations showed that the growth of reaction zone between carbon coating and matrix following heat treatments is quite slugghish.
The results of fatigue tests are displayed in Fig. 7; they show that the heat treatments at 600 °C produce a progressive reduction of the number of cycles to failure Nf as the exposure time increases.
( ) fff �A α ε =max (2) ( ) ( ) mm fm f ult m �B� E A β ασ ε + =max (3) Heat treatment Mean thickness (µµµµm) As-fabricated 0,85 400 °C, 100 hours 0,86 400 °C, 500 hours 0,95 400 °C, 1000 hours 0,98 600 °C, 100 hours 0,94 600 °C, 500 hours 0,97 600 °C, 1000 hours 0,98 being εmax the maximum deformation imposed to the probe, σult and E the ultimate tensile strength and the Young's modulus of the matrix, Nf the number of cycles to failure, αf, αm, βm, Af, Am and Bm parameters to determine by the statistical regression analysis.
The stability of fibrematrix interface and of grain size guarenteed to the composite material to maintain its original mechanical properties upon prolonged heat treatments. 3 - Fracture surfaces show plastic deformation of the matrix and pull-out of fibres, i.e. a correct load transfer from the matrix to the fibres. 4 - SEM observations showed that the growth of reaction zone between carbon coating and matrix following heat treatments is quite slugghish.
Online since: June 2010
Authors: Guang Yang, Hai Liang Xu, Yue Jian Wang
Each appraisal factor regarding various
ranks degree of membership formula respectively is
(3)~ (5)
Regarding bigger the target , the water resources supporting capacity level more low appraisal
factor, the degree of membership for various ranks relative function formula will only have above
right margin the formula the ui sector number "<=" to change ">=", after "<" will change ">" And
use the similar computation.
different level year Analysis of Criterion level of water resources supporting capacity appraisal target system separately, we know: In the water resources subsystem, the V2 level's subjection parameter of the Subsystem Appraisal factor Weight V1 V2 V3 Water resources Subsystem Average per person water resources(m 3/ per person) 0.1517 <1700 2850 >4000 Water resources use factor(%) 0.0506 >30① 25 <20① Average person water consumption(m 3/ per person ) 0.0303 >800② 600 <400 Ecological environment subsystem Forest grass coverage fraction(%) 0.1425 <15 37.5 >60 Sewage treatment success rate(%) 0.0626 <20 55 >90 The ecology needs water rate(%) 0.1437 <25 37.5 >50 Social economy subsystem Rate of natural population growth(%) 0.0795 >9.5③ 5.8 <2.1③ Urbanized level(%) 0.0203 <20 45 >70 Average perperson GDP(dollars/people) 0.1139 <400 2200 >4000 ThirdproducesaccountsfortheGDP proportion(%) 0.0609 <30 45 >60 Average per person grain
In the ecological environment subsystem, it is estimated that the V3 level's subjection parameter of sewage treatment success rate is 0.286 in 2010 and the number increases to 0.5 in 2020, Other evaluating indicators is all developed towards the benign tendency.
In the socio-economic development subsystem, the average per person GDP evaluating indicator will achieve the ideal carrying capacity in the future twenty years, it rises from 973$ per person in 2000 to 2434$ per person in 2010, 5239$ per person in 2020; The basin growth rate of population drops gradually; The urbanization level improves from 44.3% in 2000 to 50.11% in 2010, 60.87% in 2020; Third products accounts for the GDP proportion 32.3% in 2000 increases to 36.6% in 2010, 38.5% in 2020; According to estimate, per capita grain amounts of river basin will reach 410 Kg/ person in 2010 and 420 Kg/ person in 2020; The water beneficial result improves to 111 yuan/m3 in 2010 and 163 yuan/m3 in 2020 which is 69 yuan/m3 in 2000.
different level year Analysis of Criterion level of water resources supporting capacity appraisal target system separately, we know: In the water resources subsystem, the V2 level's subjection parameter of the Subsystem Appraisal factor Weight V1 V2 V3 Water resources Subsystem Average per person water resources(m 3/ per person) 0.1517 <1700 2850 >4000 Water resources use factor(%) 0.0506 >30① 25 <20① Average person water consumption(m 3/ per person ) 0.0303 >800② 600 <400 Ecological environment subsystem Forest grass coverage fraction(%) 0.1425 <15 37.5 >60 Sewage treatment success rate(%) 0.0626 <20 55 >90 The ecology needs water rate(%) 0.1437 <25 37.5 >50 Social economy subsystem Rate of natural population growth(%) 0.0795 >9.5③ 5.8 <2.1③ Urbanized level(%) 0.0203 <20 45 >70 Average perperson GDP(dollars/people) 0.1139 <400 2200 >4000 ThirdproducesaccountsfortheGDP proportion(%) 0.0609 <30 45 >60 Average per person grain
In the ecological environment subsystem, it is estimated that the V3 level's subjection parameter of sewage treatment success rate is 0.286 in 2010 and the number increases to 0.5 in 2020, Other evaluating indicators is all developed towards the benign tendency.
In the socio-economic development subsystem, the average per person GDP evaluating indicator will achieve the ideal carrying capacity in the future twenty years, it rises from 973$ per person in 2000 to 2434$ per person in 2010, 5239$ per person in 2020; The basin growth rate of population drops gradually; The urbanization level improves from 44.3% in 2000 to 50.11% in 2010, 60.87% in 2020; Third products accounts for the GDP proportion 32.3% in 2000 increases to 36.6% in 2010, 38.5% in 2020; According to estimate, per capita grain amounts of river basin will reach 410 Kg/ person in 2010 and 420 Kg/ person in 2020; The water beneficial result improves to 111 yuan/m3 in 2010 and 163 yuan/m3 in 2020 which is 69 yuan/m3 in 2000.
Online since: August 2023
Authors: Jean Claude Tawil, Stephane Bergeron, Per Jansson, Martin Hartlieb
A significant number of different Rheocasting technologies have been developed over the past decades.
It is also needed to check and adjust the grain modification and nucleation of the AlSi7Mg0.3 with Sr, and grain refinement with TiB2.
Conclusions A quickly growing number of applications in various industries are now using the Rheocasting process to produce heat sinks, leak tight components, etc., and now also structural castings.
It is also needed to check and adjust the grain modification and nucleation of the AlSi7Mg0.3 with Sr, and grain refinement with TiB2.
Conclusions A quickly growing number of applications in various industries are now using the Rheocasting process to produce heat sinks, leak tight components, etc., and now also structural castings.