Search results

Jin, et al.
El-Sheikh, A.
El-Nikhaily.
Chen, et al.

Uno et al. [2] showed mica-based nanocomposite glass-ceramics, consisting of fine tetragonal zirconia particles, 20-50 nm in size, embedded in plate-like mica crystals, which exhibited excellent mechanical properties with bending strength of 500 MPa, fracture toughness of 3.2 MPa•m1/2 and good machinability.
Baroum and El-Raghy [3] reported that Ti3SiC2 not only could be drilled and taped using high-speed steel tools, but also had a fracture strength up to 600 MPa.
Suganuma et al. [4] had fabricated SiC/C ceramic composites, which still retained high strength over 200 MPa at 1500 o C.
El-Raghy: J.

However, Male et al.[11] found that maximum concentration of gold salt (HAuCl4.3H2O) when used NaBH4 as reducing agent must be kept below 0.25 mM, or else aggregation occurs quickly, compared to 1 mM for the citrate reduction method.
Jana et al. [13] highlighted that a step by step particle enlargement method is more beneficial to avoid additional nucleation, allow a large seed to metal salt ratio to be maintained throughout the growth step.
El-Sayed, M.A.
El-Sayed, Acc.

When the magnetic field is parallel to the z-axis, the in-plane electron motion is decoupled from that along the z-axis, and is quantized into Landau levels with energies El=(l+1/2)ħωc, where l=0,1,2,…, and ωc=eB/me* is the cyclotron frequency.
Accordingly, the Schrödinger equation for the reduced (one-dimensional) problem reads: )()(),,,( )( 2 2 2 * 2 zEzVaBzU dz zd m z z eff e Ψ=Ψ + Ψ − σ h , (5) where Ez=E-El, and Ueff(z,B,Va,σz)=U0(z)+Us+Uσz(z)-ezVa/L is the effective potential which depends on external fields and electron spin, while L is the total width of all the magnetic layers.
Buyanova et al.: Physica E Vol. 13 (2002), p. 538
Dai et al.: Phys.

It has been reported that additions of rare earth modified the α-Al grains and eutectic Si phases in its as-cast state (Pandee et al., 2017).
Currently, Tantiwaitayaphan et al. [2017] investigated the modification of eutectic Si in hypoeutectic Al-Si alloys with Erbium addition.
A lot of researchers have reported on the effects of rare earth elements, microstructures, and mechanical properties (Xu et al., 2015; Mahmoud et al., 2017; Jia et al., 2017 ).
Ultimate tensile strength (UTS) and elongation (EL) to failure were measured.
Al–9.00% Si–0.25% Mg alloys modified by ytterbium. 

El-Nahhal, A.
El Ashgar, N.
El Azab, H.
El-Seedi, R.
El-Shabasy, S.

Choi, et al.
Patankar, et al. : Materials letters.
Abo El Ata: Journal of Magnetism and Magnetic Materials.

López-Gayarre, et al.
Abo-El-Eneim, GB.
Hanna, et al.

The rare-earth (RE) doping of Si and Si-related materials [1-5] in the last years has been extensively studied for the development of light-emitting devices in the Si-based optoelectronics initiated by the reports on the photoluminescence (PL) and electroluminescence (EL) centered at around 1.54 μm of Er3+ (4I13/2→4I15/2) in Si [6].
The He stopping power used here was presented by Chu et al.’s book [10].
Wang, et al.: Journal of Shandong Jianzhu University Vol. 24 (3) (2009), p. 212 [6] H.

Department of Physics, USTOMB El M’Naouer, B.P 1505 Oran, Algeria Keywords: excimer lamp, plasma, discharge, model Abstract.
Bogdanov et al:J.
Winske and M.E .Jones: IEEE Transactions on Plasma Science Vol. 22 n°4 (1994) [23] S.Bollanti et al: IEEE.