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Abdel-Rahman, Alaa El-deen, A.
El-Nahhas, Yahia A.Lotfy and Emad A.
Badawia Faculty of Science, Physics Department, El-Minia University, P.O. 61519 El-Minia, Egypt a emadbadawi@yahoo.com Keywords: Age Hardening, Aluminum Alloys, HV Values, Positron Mean Lifetime Values Abstract Many aluminum-based alloys are strengthened by a heat treatment process known as age hardening.
The mechanical characterization of heat-treatable 6xxx (Al-Mg-Si-Cu based) 6063 wrought aluminum alloys was studied.
Abdel-Rahman, Alaa Al-deen and Emad A.

Ke et al., “Electrospun polystyrene nanofibrous membranes for direct contact membrane distillation,” J.
El-Shazly, N.
El-Shazly, M.
Celebi et al., “Ultimate permeation across atomically thin porous graphene,” Science (80-.)., vol. 344, no. 6181, pp. 289–292, 2014
El-moneim, and M.

Fig. 2 PL spectra of copolymer in thin film under 390nm excitation Electroluminescent properties The EL performance of the copolymers was examined in the device configuration of ITO/PEDT/PVK/polymer/Ba/Al.
The typical EL spectra of copolymer from such device are shown in Fig. 3.
In order to evaluate the stability of the white light emission, EL spectra for copolymer PFO-DHTBT0.005 at various applied voltage, from 10.6 V to 15.6 V, are measured.
The external EL efficiencies in our standard device configuration ITO/PEDT/PVK/polymer/Ba/Al with PEDT intralayer vary with copolymer compositions.
Fig. 3 EL spectra of copolymer PFO-DHTBT with ITO/PEDT/PVK/polymer/Ba/Al structure Fig. 4 EL spectra of PFO-DHTBT0.005 on different current Table 2 Device performance of copolymers in Device configuration: ITO/PEDT/PFO-DHTBT/ Ba/Al polymer λElsmax /nm Bias (V) Current (mA) Light (cd/ m2) Cd/A QE (%) PFO-DHTBT0.001 516 8.6 5.30 249 0.70 1.04 PFO-DHTBT0.005 482 10.1 4.91 177 0.54 0.80 PFO-DHTBT0.01 602 7.7 5.45 235 0.65 1.13 PFO-DHTBT0.05 606 8.8 4.70 221 0.71 1.24 PFO-DHTBT0.1 614 11.6 5.03 395 1.18 2.06 PFO-DHTBT0.5 614 17.1 5.66 448 1.19 2.08 Conclusions We synthesized conjugated copolymers PFO-DHTBT, composed of random 9,9-dioctylfluorene and DHTBT, via a palladium-catalyzed Suzuki coupling reaction.

Static and Cyclic Deformation of Commercially Pure Al Processed by Equal-Channel Angular Pressing Using Two Routes Mahmoud S Soliman1,a, Ehab A El-Danaf1,b, Abdulhakim A Almajid1,2,c 1 Mechanical Engineering Department- College of Engineering, King Saud University- P.O.
The present data is compared to those for coarse grained Al (CG Al) and ECAPed for 8 passes using route BC (8BC) [8].
El-Danaf, M.S.
El-Rayes: Mater.
Azushima et. al.: CIRP Annals- Manufacturing Technology Vol. 57 (2008), p. 716

EL-Sheikhy1*, A.
El-Sheikhy and A.
[4] Refat El-Sheikhy, Abdulaziz Alkuraif, Mosleh Al-Shamrani, “Converting polymer wastes to nanocomposites”, Vacuum, Vol. 217 (2023)
[13] El-Sheikhy, R.., Al-Shamrani M.
El-Sheikhy, N.

Al2O3/Al-4%Cu alloy composites were manufactured by squeeze casting.
An Al-4% (wt) Cu alloy was chosen as the matrix material.
The preform was infiltrated by Al melt.
Abd El-Azim, M.
El-Baradie: Materials Letters Vol. 56 (2002), p. 963

Lee et al[5] and Cheng et al[6] reported several PO hosts with the structures of DPPO(diphenylphosphine oxide) -bonding carbazole derivatives, in which excellent current- voltage (I-V) characteristics and highly efficient deep-blue electrophosphorescence have been realized.
The excellent carrier injecting/ transporting ability of these hosts is one of the main factors directly affecting EL performances, including the driving voltage and efficiencies.
The array of 4 mm2 devices is completed by depositing 1 nm thick LiF and 200 nm thick Al through a shadow mask to define the cathodes.
Results and discussion Fig.2. depicted normalized EL spectra of all devices at the driving voltage of 8V.
Normalized EL spectra of B1, B2, B3 and B4 (b) (a) (d) (c) (d) (c) Fig.3.

Tour et al; 2014.
Gueye et al; 2017 with lower thermal response time of ⁓ 50 s [30].
El-basaty, E.
Lin et al., ‘Laser-induced porous graphene films from commercial polymers’, Nat.
El-moneim, E.

[3] Estimation of Crystalline Size of Deformed 5251 Al Alloy using PALT and XRD Techniques M.
El-Sayed, A.
Badawia Faculty of Science, Physics Department, El- Minia University, El-Minia, Egypt aemadbadawi@yahoo.com Keywords: Al Alloys, Grain Size, Plastic Deformation, Positron Annihilation Lifetime, XRD Abstract Certain radioactive isotopes decay by emitting positrons, and the positrons can be used to probe the structure of solid materials.
Some measurements had been pervious performed on alloys by MacKee et al. [12], Xianyi et al., [14], Weiming et al. [15], Abdelrahman [16] and Dupasquier et al. [17].
The source - sample configuration was then wrapped in a thin Al foil.

An ohmic contact was formed on p-type region by deposition of Al and Ti by magnetron sputtering and annealing at 1100o C.
EL spectrums of diodes were measured in temperature range 300- 600 K on a LOMO spectrometer using photon counting system.
In Fig. 3,4 are presented temperature dependence of EL green band intensity in: 6H-SiC pn diodes, grown by SEV and irradiated by fast electrons [9]; 6H-SiC diodes with pn junction formed by implantation of Al ions [10]; 3C-SiC pn diodes, grown by SEV[12] and obtained in this work in p+-3CSiC/n+ -6H-SiC hetero diodes.
Intensity of the presented at EL spectrum of this samples green band (2.357 eV) has the same temperature and forward current dependences as for free-exiton EL in 3CSiC pn junctions.
[7] N.S.Savkina, A.A.Lebedev, A.M.Strel'chuk, A.S.Tregubova et.al: Mat.Sci.Eng.