Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: October 2015
Authors: Mihai Alin Pop, Teodor Machedon Pisu, Barna Fazakas, Radu Cristian Seculin
The structure of sample SC 3, (500X, chemical etch- Nital 10%, maintaining time 4–5sec) a) basic material, b) HAZ, c) weldind bead
BM –basic material; has a ferrite-pearlite structure
HAZ – heat affected zone; it is composed of ferrite and spheroidal pearlite
Welding bead – has a structure formed by spheroidal pearlite and ferrite grains and it can be observed a columnar shape orientated in the direction of the solidification front.
Acknowledgements: This paper is supported by the Sectoral Operational Programme Human Resources Development (SOP HRD), financed from the European Social Fund and by the Romanian Governmentunder the contract number POSDRU/159/1.5/S/137070.
Iovanas, Method and device for electrically charging the powders used in the reconditioning processes by metal-sprayed coating, Patent Number: RO128810-A0, Patent Assignee Name and Code: UNIVERSITY BRASOV TRANSILVANIA (UYBR-Non-standard)
Acknowledgements: This paper is supported by the Sectoral Operational Programme Human Resources Development (SOP HRD), financed from the European Social Fund and by the Romanian Governmentunder the contract number POSDRU/159/1.5/S/137070.
Iovanas, Method and device for electrically charging the powders used in the reconditioning processes by metal-sprayed coating, Patent Number: RO128810-A0, Patent Assignee Name and Code: UNIVERSITY BRASOV TRANSILVANIA (UYBR-Non-standard)
Online since: May 2023
Authors: Mervat Gaber Eisa, Hesham Sameh, Mahmoud M. Abd El-Razik
The grain size distributions of both EPS and RWG along with the upper and lower acceptable/ standard limits of ASTM C33 [7] are presented in Fig.3.
The considerable reduction in TC is attributed to the high number of air voids created by EPS. % RWG possessed TC values less than the limit prescribed for thermal insulation mortars as per BS EN 998.
The considerable reduction in TC is attributed to the high number of air voids created by EPS [12].
The considerable reduction in TC is attributed to the high number of air voids created by EPS. % RWG possessed TC values less than the limit prescribed for thermal insulation mortars as per BS EN 998.
The considerable reduction in TC is attributed to the high number of air voids created by EPS [12].
Online since: May 2023
Authors: Yuan Yuan Ju, Lei Zhang
(3)
where δi presents the atomic stress for atom i, Vi the corresponding atomic volume, m the number of atoms contained within each bin, ΔV the volume of each bin.
In addition, the number of the particles contained within the computation system is limited due to the poor computational condition, as may also enlarge the statistical average error.
Dongare, Defect and damage evolution during spallation of single crystal Al: Comparison between molecular dynamics and quasi-coarse-grained dynamics simulations, Computational Materials Science 145 (2018) 68-79
In addition, the number of the particles contained within the computation system is limited due to the poor computational condition, as may also enlarge the statistical average error.
Dongare, Defect and damage evolution during spallation of single crystal Al: Comparison between molecular dynamics and quasi-coarse-grained dynamics simulations, Computational Materials Science 145 (2018) 68-79
Online since: June 2012
Authors: Yun Xia Chen, Xing Yong Gu, Ai Hua Zhang, Shao Ling Wu, Ting Luo
Table 1 Thermal conductivity for several materials[8,9]
Ceramic materials
AlN
BN
Si3N4
SiC
Thermal conductivity /[W·m-1·K-1]
230.5
251.4
25
251.4
Table 2 The added materials and their amount
Sample number
A-0
A-1
A-2
A-3
A-4
Additive materials
-
AlN
BN
SiC
Si3N4
Addition amount[wt%]
-
5.00
5.00
5.00
5.00
Experimental Procedure
Experimental formula and sample preparation.
Fig. 5 The top surface temperature (A) and calculated thermal conductivity (B) of the composites sintered at 1560°C Table 3 True porosity of samples sintered at 1560°C Sample number A-0 A-1 A-2 A-3 A-4 True porosity[%] 6.6 3.4 12.2 16.8 12.9 Fig.6 XRD patterns of all samples Effect of adding different high thermal conductivity materials on the performance of thermal conductivity.
Firstly, the thermal conductivity of the materials is highly depended on comprehensive influence of varieties and quantity of crystalline phases, crystalline structure, grain size, density and other factors.
Fig. 5 The top surface temperature (A) and calculated thermal conductivity (B) of the composites sintered at 1560°C Table 3 True porosity of samples sintered at 1560°C Sample number A-0 A-1 A-2 A-3 A-4 True porosity[%] 6.6 3.4 12.2 16.8 12.9 Fig.6 XRD patterns of all samples Effect of adding different high thermal conductivity materials on the performance of thermal conductivity.
Firstly, the thermal conductivity of the materials is highly depended on comprehensive influence of varieties and quantity of crystalline phases, crystalline structure, grain size, density and other factors.
Online since: March 2015
Authors: Su Ping Cui, Qi Gang Zhao, Hong Liu, Zuo-Ren Nie, Ya Li Wang
Table 5 Raw materials mixed with municipal sludge
Municipal Sludge
ingredients(%)
ratio value
The sample number
dosage
The limestone
sandstone
Iron powder
bauxite
Coal ash
KH=0.91
SM=2.6
IM=1.6
1
0.00
85.64
5.90
2.03
6.43
3.17
5.00
82.40
5.32
1.93
5.34
3.09
10.00
79.17
4.75
1.84
4.25
3.01
15.00
75.93
4.17
1.74
3.16
2.93
2
20.00
72.70
3.59
1.64
2.07
2.85
25.00
69.47
3.01
1.55
0.98
2.77
29.44
66.60
2.50
1.46
0
2.70
KH=0.94
SM=2.6
IM=1.6
10.00
79.64
4.57
1.79
4.00
3.01
3
15.00
76.38
4.00
1.69
2.92
2.93
20.00
73.13
3.43
1.60
1.84
2.85
25.00
69.88
2.86
1.51
0.75
2.77
28.46
67.64
2.46
1.44
0
2.71
Clinker calcination method.
Fig. 4 showed that when the city sludge ash was 20%, clinker sample has a large number of low-temperature calcination of C2S.
Clinker mixed with sludge had less inclusions, clear grain boundary, and uniform intermediate phase, which were slightly better than blank morphology not-mixed sludge.
Fig. 4 showed that when the city sludge ash was 20%, clinker sample has a large number of low-temperature calcination of C2S.
Clinker mixed with sludge had less inclusions, clear grain boundary, and uniform intermediate phase, which were slightly better than blank morphology not-mixed sludge.
Online since: February 2012
Authors: Nai Chuan Guo, Hong Wei Guo, Shang Xu Wang
Heterogeneities occur over a broad range of scales, from submillimeter grain and pore scale, to the many-kilometer basin scale.
The sampling number of each channel is 4096 with sampling rate 0.2.
The heterogeneous structure is between the two red lines whose shot numbers are 23 and 173 respectively.
The sampling number of each channel is 4096 with sampling rate 0.2.
The heterogeneous structure is between the two red lines whose shot numbers are 23 and 173 respectively.
Online since: November 2013
Authors: K.M. Jadhav, Ram S. Barkule, D.R. Shengule, N.N. Waghule, D.V. Kurmude, A.V. Raut
Introduction:
Ferrimagnetic ferrite materials are of great interest in the past as well as in the recent years due to their useful electromagnetic properties, for a large number of applications from microwave to radio frequencies [1].
The importance of spinel ferrite in their bulk form (grain dimensions is in micrometer scale) is limited to a few megahertz frequency due to their high electrical conductivity and domain wall resonance [3,4].
D=σKBTNe2 (3) Where σ is the dc electrical conductivity, N is the number of atoms/m-3, e is defined above, and kB is the Boltzmann constant.
The importance of spinel ferrite in their bulk form (grain dimensions is in micrometer scale) is limited to a few megahertz frequency due to their high electrical conductivity and domain wall resonance [3,4].
D=σKBTNe2 (3) Where σ is the dc electrical conductivity, N is the number of atoms/m-3, e is defined above, and kB is the Boltzmann constant.
Online since: January 2021
Authors: Igor Smurov, Maria Doubenskaia, Alexandr Shtertser, Igor Batraev, Vladimir Ulianitsky
High wear resistance of thermal sprayed cemented carbide coatings causes a large number of studies related to both their preparation and study of properties [4-10].
This parameter was determined by dividing the mass of the deposited coating by the mass of the powder ejected by the powder feeder for a given number of shots.
Fig. 2 shows the microstructure of coatings, where it can be seen that the carbide grains of the WC/Co coating are much smaller than the ones of the Cr3C2/NiCr coating.
This parameter was determined by dividing the mass of the deposited coating by the mass of the powder ejected by the powder feeder for a given number of shots.
Fig. 2 shows the microstructure of coatings, where it can be seen that the carbide grains of the WC/Co coating are much smaller than the ones of the Cr3C2/NiCr coating.
Online since: September 2014
Authors: Heng Jia Zhang, Ji Dong Zhang
Previous study showed that grain yield was seriously affected by water deficit at silking or heading of maize [1].
Blank model was described as =i (1) where Ya is the actual crop yield, Ym is the maximum yield under full irrigation, n is the number of growth stages, i is the serial number of growth stage, ETa is the actual evapotranspiration at the stage i, ETmi is evapotranspiration at stage i corresponding to Ym, and λi is the WSI at stage i.
Blank model was described as =i (1) where Ya is the actual crop yield, Ym is the maximum yield under full irrigation, n is the number of growth stages, i is the serial number of growth stage, ETa is the actual evapotranspiration at the stage i, ETmi is evapotranspiration at stage i corresponding to Ym, and λi is the WSI at stage i.
Online since: February 2007
Authors: Xiao Lin Liu, Jian Feng Chen, Tao Yan
Table 1 Characteristics of nanocomposites prepared in this work
SBET(m
2/g)
Cu/(Cu+Ce)
(molar ratio) average grain
size (nm)a
D(111)
(nm)b 673K 873K 1073K 1273K
Pure CeO2 30 10 23 44 33 9
0.05 25 9 44 69 50 35
0.1 20 6 42 49 38 27
0.12 25 7 27 38 33 19
0.15 25 7 23 25 26 10
a Calculate from TEM micrographs.
Acknowledgements This work was supported by the Talent Training Program of the Beijing City under grant number 9558103500 and the Fok Ying Tung foundation under grant number 81063.
Acknowledgements This work was supported by the Talent Training Program of the Beijing City under grant number 9558103500 and the Fok Ying Tung foundation under grant number 81063.