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Online since: April 2008
Authors: Pavel Hrma, Albert A. Kruger
These projected waste streams will substantially vary, both in the number and concentration ranges
of major components.
The major obstacle to its implementation on a large scale, the migration of waste species into the refractory lining, has been overcome by using fine-grain additives and adding cellulose to the melter feed.
The major obstacle to its implementation on a large scale, the migration of waste species into the refractory lining, has been overcome by using fine-grain additives and adding cellulose to the melter feed.
Online since: March 2007
Authors: M. Roth, Horst Biermann
In fig. 1 the microstructure with a small volume fraction of lamellar grains of approximately
10 % is shown.
In fig. 3 the stress-strain hysteresis loops at half number of cycles to failure, NF/2, of the different temperature-strain cycles are shown for the temperature range 400°C to 800°C.
In fig. 3 the stress-strain hysteresis loops at half number of cycles to failure, NF/2, of the different temperature-strain cycles are shown for the temperature range 400°C to 800°C.
Online since: November 2012
Authors: Rong Bian, Eleonora Ferraris, Jun Qian, Dominiek Reynaerts, Liang Li, Ning He
These tools are made of fine grain tungsten carbide and are further coated with CVD diamond of 6~7μm in thickness.
Test n ap fz (vf) ~hmax ID. rpm mm mm mm/min μm 1 TC1 38000 0.002 0.001 76 0.62 2 TC4 38000 0.002 0.003 228 1.58 3 TC3 38000 0.002 0.005 380 1.99 4 TC6 38000 0.004 0.001 76 0.84 5 TC5 38000 0.004 0.003 228 2.39 6 TC2 38000 0.004 0.005 380 3.55 Table 3 Groove numbers and the corresponding cutting length during each test Groove No. n1 n2 n3 n4 n5 n6 milling layers 6 6 48 40 40 40 Accumulative cutting length lac (mm) 66 132 660 1100 1540 1980 Results and discussion Surface roughness.
Test n ap fz (vf) ~hmax ID. rpm mm mm mm/min μm 1 TC1 38000 0.002 0.001 76 0.62 2 TC4 38000 0.002 0.003 228 1.58 3 TC3 38000 0.002 0.005 380 1.99 4 TC6 38000 0.004 0.001 76 0.84 5 TC5 38000 0.004 0.003 228 2.39 6 TC2 38000 0.004 0.005 380 3.55 Table 3 Groove numbers and the corresponding cutting length during each test Groove No. n1 n2 n3 n4 n5 n6 milling layers 6 6 48 40 40 40 Accumulative cutting length lac (mm) 66 132 660 1100 1540 1980 Results and discussion Surface roughness.
Online since: March 2025
Authors: Francesco Ruffino, Chawki Awada
Images processing of SEM was conducted using Mark grain by watershed in Gwydion software to extract the size distribution.
The number of Pd nanoparticles versus the radius was fitted using an exponential decay function to extract the average size.
The number of Pd nanoparticles versus the radius was fitted using an exponential decay function to extract the average size.
Online since: April 2022
Authors: Olena M. Berdnikova, Olha Kushnarova, Illia Klochkov, Sviatoslav Motrunich, Artemii Bernatskyi
Results of X-ray spectral analysis of lap joints of 03Х11Н10М2T and 12Х18Н10Т steels obtained by laser welding
Point number
(on figures)
Composition of elements, (wt.%)
Fe
Cr
Ni
Mo
Ti
Mn
1 (Fig. 1.c)
64.25
17.04
8.1
5.3
4.25
1.06
2 (Fig. 1.c)
35.8
11.75
3.75
23.64
24.36
0.7
3 (Fig. 1.c)
46.9
14.8
5.6
18.26
13.9
0.54
4 (Fig. 1.d)
41.27
14.16
4.9
1.87
36.9
0.9
5 (Fig. 1.d)
15.5
6.59
1.16
1.9
74.45
0.4
6 (Fig. 1.d)
38.9
13.21
5.0
0.82
41.2
0.87
7 (Fig. 1.e)
8.0
3.8
1.0
0.83
85.8
0.12
8 (Fig. 1.e)
69.7
18.48
9.8
0.37
0.33
1.32
9 (Fig. 1.e)
69.7
19.74
9.0
-
0.36
1.2
10 (Fig. 1.f)
68.7
19.08
10.14
0.18
0.7
1.2
11(Fig. 1.f)
55.3
16.94
6.8
11.06
8.9
1.0
12 (Fig. 1.f)
15.8
5.74
1.7
34.4
41.8
0.56
The increase in the concentration of Mo and Ti at several local points (Fig. 1.c-f, Table 3) is explained by the segregation of these elements along grain boundaries.
Online since: August 2019
Authors: Rudolf Hela, Martin Ťažký, Lucia Osuská
Fig.1: Grain size curves of used aggregates
Tab.1: Physical parameters of used aggregates
sample
particle density [kg·m-3]
water absorption 24h[%]
0-4 mm Žabčice
2560
0.34
4-8 mm Olbramovice
2660
0.46
8-16 mm Olbramovice
2680
0.48
Tab.2: Physical-mechanical parameters of fly ash Rybnik
sample
specific weight [kg·m-3]
loss of ignition [%]
fineness [%]
efficiency index [%]
7-day
28-day
90-day
Rybnik
2120
2.6
34.6
85.8
83.9
81.6
From the test results of high-temperature fly ash from the production of thermal power plant Rybnik it is clear that the ash analyzed fulfils the parameters of EN 450-1 [8] and shows very favourable efficiency index values already in the early maturation of the samples.
All mentioned tests were always performed in the number of 3 test specimens and the following Tab. 4 shows the average values from these determinations.
All mentioned tests were always performed in the number of 3 test specimens and the following Tab. 4 shows the average values from these determinations.
Online since: February 2019
Authors: Hasnah Mohd Zaid, Hanan Fakhruldi, Foo Yoong Yow, Norzafirah Razali, Yaleeni Kanan Dasan
A number of methods have been used to prepare TiO2 nanoparticle such as sol-gel [10], refluxing [11], chemical precipitation [12], microemulsion [12], hydrothermal reaction [13] and combustion synthesis [14].
From Fig. 2(a), it is observed small aggregate TiO2 nanoparticles in the spherical shape with uniform average grain size of 15-20 nm, which are consistent with XRD results.
From Fig. 2(a), it is observed small aggregate TiO2 nanoparticles in the spherical shape with uniform average grain size of 15-20 nm, which are consistent with XRD results.
Online since: February 2007
Authors: M.S. Jogad, V.K. Shrikhande, A.H. Dyama, L.A. Udachan, Govind P. Kothiyal
With optimized heat treatments one can realize very fine-grained uniform structure,
free from porosity, low thermal expansion, desired dielectric constant and good resistance to thermal
shock.
Neglecting inter-ionic interactions, the polarization conductivity σ (ω) can be written as σ (ω) = ∫0∞ N (R) α (R) ρ (R) (ω 2τ /(1+(ωτ) 2) dR (10) where, N (R) is the number of hopping pairs of sites per unit volume; α (R) is the polarizability, ρ (R) is the spatial distribution of pairs of sites and τ = τ0e w/kT is the relaxation time at temperature T corresponding to a thermally activated hopping mechanism.
Neglecting inter-ionic interactions, the polarization conductivity σ (ω) can be written as σ (ω) = ∫0∞ N (R) α (R) ρ (R) (ω 2τ /(1+(ωτ) 2) dR (10) where, N (R) is the number of hopping pairs of sites per unit volume; α (R) is the polarizability, ρ (R) is the spatial distribution of pairs of sites and τ = τ0e w/kT is the relaxation time at temperature T corresponding to a thermally activated hopping mechanism.