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Online since: December 2006
Authors: Kun Yu Zhao, A. Sergueeva, Carl C. Koch, Amiya K. Mukherjee, Xin Kun Zhu, C.J. Li, X. Zhang
The largest tensile elongation to failure (percent elongation, %EL) (150%) was observed at room
temperature in UFG element Zn at present.
The sample of Zn ball milled for 3 hours and annealed at the above condition has the yield strength (σ0.2) value of 95 MPa and the largest 150% EL in tensile test, which is larger than 110 % EL and lower than σ0.2 of 115 MPa of Zn observed previously with average grain size of 240 nm at the same condition of tensile test[1].
Koch et al.: Applied Physics Letters, Vol. 81 (2002), p. 823 [2] S.X.
The sample of Zn ball milled for 3 hours and annealed at the above condition has the yield strength (σ0.2) value of 95 MPa and the largest 150% EL in tensile test, which is larger than 110 % EL and lower than σ0.2 of 115 MPa of Zn observed previously with average grain size of 240 nm at the same condition of tensile test[1].
Koch et al.: Applied Physics Letters, Vol. 81 (2002), p. 823 [2] S.X.
Online since: January 2016
Authors: Norhanifah Mohd Yazid, Asrul Mustafa, Ruslimie Che Ali
Fig. 3 and 4 show the FTIR spectra of undissolved (a) PVA particles and (b) PAA particles which confirmed the presence of PVA where the functional of hydroxyl group of PVA at 3250.10 cm-1 Krumoza et al.,(2000)[12] is observed in PVA/ENR25 spectrum.
El-Houssiny, A.A.M.
Abd-El-Messiah, Biodegradable blends based on polyvinyl pyrrolidone for insulation purposes, Journal of Applied Polymer Science. 124 (2012) 3879-3891
Kawahara, E.L.
El-Houssiny, A.A.M.
Abd-El-Messiah, Biodegradable blends based on polyvinyl pyrrolidone for insulation purposes, Journal of Applied Polymer Science. 124 (2012) 3879-3891
Kawahara, E.L.
Online since: August 2013
Authors: He Xiang Ning, Xu Lei, Zhang Chao, Zhou Qiang
Shams El-Dein, M.Z., M.
[3].Shams El-Dein, M.Z., M.
[6].Hu, H., et al.
Tseng, S.Y., et al.
[10].Ji, Y., et al.
[3].Shams El-Dein, M.Z., M.
[6].Hu, H., et al.
Tseng, S.Y., et al.
[10].Ji, Y., et al.
Online since: September 2022
Authors: Amnart Suksri, Panupong Khaibuth
Wang et al., “Electrical tree characteristics of epoxy resin under AC voltage at 77 K,” Cryogenics (Guildf)., vol. 99, pp. 123–129, Apr. 2019
Bell et al., “Investigation of dielectric breakdown in silica-epoxy nanocomposites using designed interfaces,” J.
Han et al., “Inhibition effect of graphene nanoplatelets on electrical degradation in silicone rubber,” Polymers (Basel)., vol. 11, no. 6, Jun. 2019
El-Zein, “Digital image processing for physical basis analysis of electrical failure forecasting in XLPE power cables based on field simulation using finite-element method,” IET Gener.
El-Zein, “Digital image processing for physical basis analysis of electrical failure forecasting in XLPE power cables based on field simulation using finite-element method,” IET Gener.
Bell et al., “Investigation of dielectric breakdown in silica-epoxy nanocomposites using designed interfaces,” J.
Han et al., “Inhibition effect of graphene nanoplatelets on electrical degradation in silicone rubber,” Polymers (Basel)., vol. 11, no. 6, Jun. 2019
El-Zein, “Digital image processing for physical basis analysis of electrical failure forecasting in XLPE power cables based on field simulation using finite-element method,” IET Gener.
El-Zein, “Digital image processing for physical basis analysis of electrical failure forecasting in XLPE power cables based on field simulation using finite-element method,” IET Gener.
Online since: May 2012
Authors: Laurent Ottaviani, Dominique Planson, Frank Torregrosa, M.A. El Khakani, Frédéric Milesi, Stéphane Biondo, Mihai Lazar, Wilfried Vervisch, Olivier Palais, Julian Duchaine, V. Le Borgne
El Khakani4,g, F.
Dark currents are lower with Al-implanted diodes (2 pA/cm2 @ - 5 V).
Al-implanted photodiodes reveal a ratio six times higher than B-implanted diodes.
For a given annealing temperature, B-implanted diodes give rise to a higher signal than Al-implanted diodes.
Fig.6 Spectral responsivities of Al-implanted photodetector (the power source light is shown in the inset) Fig.7 Spectral responsivities of Al- and B- implanted photodetectors Summary 4H-SiC UV photodetectors were realised, based on implanted p+n junctions either by Al standard beam or by B plasma.
Dark currents are lower with Al-implanted diodes (2 pA/cm2 @ - 5 V).
Al-implanted photodiodes reveal a ratio six times higher than B-implanted diodes.
For a given annealing temperature, B-implanted diodes give rise to a higher signal than Al-implanted diodes.
Fig.6 Spectral responsivities of Al-implanted photodetector (the power source light is shown in the inset) Fig.7 Spectral responsivities of Al- and B- implanted photodetectors Summary 4H-SiC UV photodetectors were realised, based on implanted p+n junctions either by Al standard beam or by B plasma.
Online since: April 2021
Authors: Abdelkader El Kissani, Hind El Aakib, Abderrahmane Abbassi, Abdelfattah Narjis, Amane Oueriagli, Abdelkader Outzourhit, Lahcen Nkhaili
El Kissani1, H.
El Aakib1, A.
El Kissani, A.
Mora-Seró et al., “Determination of carrier density of ZnO nanowires by electrochemical techniques,” Appl.
Yang et al., “Controlled growth of ZnO nanowires and their optical properties,” Adv.
El Aakib1, A.
El Kissani, A.
Mora-Seró et al., “Determination of carrier density of ZnO nanowires by electrochemical techniques,” Appl.
Yang et al., “Controlled growth of ZnO nanowires and their optical properties,” Adv.
Online since: October 2007
Authors: Claude J.A. Monty, Lassad El Mir, Donats Millers, Larisa Grigorjeva, Krishjanis Smits, Jules Kouam
The Luminescence Properties of ZnO:Al Nanopowders Obtained by
Sol-gel, Plasma and Vaporization-condensation Methods
Larisa Grigorjeva 1,a, Donats Millers 1,b, Krishjanis Smits
1,c
, Claude Monty 2,d,
Jules Kouam 2,e and Lassad El Mir 3,f
1
Institute of Solid State Physics, University of Latvia, Kengaraga 8, LV-1063 Riga, Latvia
2
CNRS laboratoire Procédés, Matériaux et Énergie Solaire (PROMES), Odeillo, Font Romeu
66120, France
3
L.
The concentration of Al in the raw material ranged between 0.8 - 5.1 at.% Al in the PL powders and 3-15 at.% Al in the SG powders.
SEM images of ZnO:Al (5.1 at.
The different exciton states were 3at.% Al 6at.% Al 9at.% Al 15at.% Al-2 15at.% Al-10 100000 200000 300000 Luminescence intensity, a.u.
In PL ZnO:Al powders the ZnAl2O4 phase was detected.
The concentration of Al in the raw material ranged between 0.8 - 5.1 at.% Al in the PL powders and 3-15 at.% Al in the SG powders.
SEM images of ZnO:Al (5.1 at.
The different exciton states were 3at.% Al 6at.% Al 9at.% Al 15at.% Al-2 15at.% Al-10 100000 200000 300000 Luminescence intensity, a.u.
In PL ZnO:Al powders the ZnAl2O4 phase was detected.
Online since: September 2013
Authors: Daniele Zonta, Cristiano Loss, Maurizio Piazza
The state-of-the-art of DDBA method was provided in the book by Priestley et al. [2], while some considerations on the method can be seen in Sullivan and Calvi [5] and in Welch et al. [6], which we recommend.
The spectral intensity that causes Sd,el to develop can be then derived, once known the shape of elastic displacement response spectrum (Fig. 1d).
In this work, the simplified Judd and Fonseca’s model [14], modified as discussed in Loss et al. [15], is used.
On the other hand, the equivalent viscous damping is assumed of 18 %, as recommended by Filiatrault et al. [16], for an inter-storey drift of shear walls higher than 0.35 %, and it complies with the model proposed by Loss et al. [15].
From an estimated damping correction factor of 0.7, we have evaluated a final equivalent elastic spectral displacement capacity of Scap,el=158 mm.
The spectral intensity that causes Sd,el to develop can be then derived, once known the shape of elastic displacement response spectrum (Fig. 1d).
In this work, the simplified Judd and Fonseca’s model [14], modified as discussed in Loss et al. [15], is used.
On the other hand, the equivalent viscous damping is assumed of 18 %, as recommended by Filiatrault et al. [16], for an inter-storey drift of shear walls higher than 0.35 %, and it complies with the model proposed by Loss et al. [15].
From an estimated damping correction factor of 0.7, we have evaluated a final equivalent elastic spectral displacement capacity of Scap,el=158 mm.
Online since: November 2018
Authors: B. Rushi Kumar, R. Suresh Babu, P.A. Dinesh
Among them, Chandrasekhara and Namboodiri [15] carried out a study on mixed convection about inclined surfaces in a saturated porous media by taking only variable permeability, whereas, Mohammadein and El-Shaer [16] and Shivakumara et al [17] were discussed the combined effects of mixed convective flow over a semi-infinite vertical plate by taking into account of variable permeability, thermal conductivity, Soret, and Dufour.
Suresh Babu et al [21] have been discussed the effects of variable fluid properties for the vertical plate embedded in a sparsely packed porous medium.
Also, our results are compared with Nalinakshi et al. [21] in the absence of external magnetic field in Table-2 and found in good agreement up to six decimal places of accuracy for VP case.
Chamkha and Al-Humoud, Mixed convection heat and mass transfer of non-Newtonian fluids from a permeable surface embedded in a porous medium, Int.
El-Shaer, Influence of variable permeability on combined free and forced convection flow past a semi-infinite vertical plate in a saturated porous medium, Heat Mass Transfer, 40 (2004) 341-346
Suresh Babu et al [21] have been discussed the effects of variable fluid properties for the vertical plate embedded in a sparsely packed porous medium.
Also, our results are compared with Nalinakshi et al. [21] in the absence of external magnetic field in Table-2 and found in good agreement up to six decimal places of accuracy for VP case.
Chamkha and Al-Humoud, Mixed convection heat and mass transfer of non-Newtonian fluids from a permeable surface embedded in a porous medium, Int.
El-Shaer, Influence of variable permeability on combined free and forced convection flow past a semi-infinite vertical plate in a saturated porous medium, Heat Mass Transfer, 40 (2004) 341-346
Online since: August 2007
Authors: M.R. Dashtbayazi, M.R. Alinejad, Tolou Shokuhfar, Ali Shokuhfar
As can been in this figure Al particles
deformed and SiC particles fractured and incorporated into the Al matrix.
Fig. 9 shows Williamson-Hall plot for Al phase.
Al particles tend to agglomerate due to high energy produces by planetary mill, and ductility of Al phase itself.
El-Eskandarani: Mechanical Alloying for Fabrication of Advanced Engineering Materials (Noyes Publications/William Andrew Publishing, Norwich, NY 2004)
El-Eskandarani: J. alloys and Compounds Vol. 279 (1998), p. 263 [3] J.
Fig. 9 shows Williamson-Hall plot for Al phase.
Al particles tend to agglomerate due to high energy produces by planetary mill, and ductility of Al phase itself.
El-Eskandarani: Mechanical Alloying for Fabrication of Advanced Engineering Materials (Noyes Publications/William Andrew Publishing, Norwich, NY 2004)
El-Eskandarani: J. alloys and Compounds Vol. 279 (1998), p. 263 [3] J.