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The abundance of chain-(Q2), sheet-(Q3), and framework-like (Q4) tetrahedral units, and the distribution of Al among those units in CaO-Al2O3-SiO2 and MgO-Al2O3-SiO2 glass system, have been investigated by 29Si and 27Al magic-angle spinning nuclear magnetic resonance [3].The coordination structure of Al3+ in CaO−Al2O3−SiO2 aluminosilicate glasses (CAS) was studied using solid-state27Al and 29Si magic-angle-spinning NMR [4].The effect of Ti4+ on the site of Al3+ in the structure of CaO–Al2O3–SiO2–TiO2 system glass was studied.
(iii) Absorption peaks in the region of 800～1200cm-1 are due to antisymmetry telescopic vibration of Si-O-Si and Si-O-Al, respectively [8].
In Comparison with sample 1, the absorption peak becomes sharp at 470~600cm-1 in sample 2.The vibrations of Si-O-Al groups is observed to increase with a shift from704cm-1 to 717cm-1.
CaO and MgO are modifier oxide and enter the glass network by breaking Si–O–Si or Si–O–Al bonds.
El-Damrawi: Condens.

Recently, Gall et al. [16] and Jay et al. [12] have measured the torsion hysteresis of the of the magnetostricitve film-substrate cantilever system.
In order to validate our model, referring to structure that has been studied by Jay et al. [12], we have calculated the torsion hysteresis of the cantilever system in the fig. 4.
When the step line of the torsion curve is taken into account, the calculated torsion hysteresis is qualitatively agrees with the butterfly curve measured by Jay et al. [12].
This discrepancy is due to the single domain model that has employed in our theory to predict the structure those Jay et al. [12] have experimentally studied which is exactly in the multidomain state.
Socha et al.: J.

Chamkha et al. [4] studied effects on mixed convention in heat and mass transfer of a non-Newtonian fluid saturated in a non-Darcy porous medium.
Mohammadein and El-Shaer [6] extended studies on combined free-forced convection flow over a vertical plate by incorporating the variable permeability, thermal conductivity.
Nalinakshi et al. [13] studied the effect of MHD flow over a vertical heated plate in a porous medium by considering variable fluid properties.
Muthuraj et al. [14] studied MHD flow of a couple stress fluid through a horizontal wavy surface with viscous dissipation in a porous medium.
Mohammadein and N.A 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

[55] Chen, L.; El-Wardany, T.I.; Harris, W.C.
[69] El-Axir, M.H.
[71] El-Wahab, A.I.; Kishawy, H.A.
[76] El-Sonbaty, I.A.; Khashaba, U.A.; Selmy, A.I.; Ali, A.I.
[80] Dweiri, F.; Al-Jarrah, M.; Al-Wedyan, H.

X-ray diffraction patterns of MA: (a) Al-5%SiC, (b) Al-10%SiC, (c) Al-15%SiC after 25h of milling time.
SEM morphologies of (a) Al-5 % SiC, (b) Al-10 % SiC (c) Al-15 % SiC after 1h of ball milling time.
SEM morphologies of (a) Al-5 % SiC, (b) Al-10 % SiC (c) Al-15 % SiC after 10h of ball milling time.
SEM morphologies of (a) Al-5 % SiC, (b) Al-10 % SiC (c) Al-15 % SiC after 25h of ball milling time.
Sherif El-Eskandarany, Journal of Alloys and Compounds Vol. 279 (1998), p. 263 [3] E.M.

Abo El-Ola, et al.
Liu, et al.
Hang ,et al.
El-Khatib, W.
El-Halwagy, et al.

Bounab. ‘’Estimation of Solar Radiation at Ain El Melh Station Case of Clear Sky’’.
Al-Ansari, E.
Master’s thesis in materials physics from the University of Mohamed El Bachir El Ibrahimi – Bordj Bou Arreridj.
Al-Ghezi, W.
El Mghouchi. ‘’New model to estimate and evaluate the solar radiation’’.

B., Salah, B., & El-Muraikhi, M. (2019).
Al-Saadi (2021).
H., & Al‐Saadi, T.
M., Abd El-Kaream, S.
H., Al-Saadi, T.

Dissolution of Al 6%wt C Mixture Using Mechanical Alloying R.
Fig. 1 shows the phase diagram obtained at equilibrium condition for the Al–C system studied here.
Figure 1 - Al-C phase diagram [6].
Extended solid solubility for Al-W binary system by mechanical alloying.
El-Eskandarany, Mechanical alloying: For fabrication of advanced engineering materials, William Andrew, 2001, p 257

El Rayes 1 , Ehab A.
El Danaf 2 and Mahmoud S.
This is in agreement with Mishra et al [3] who concluded that high ratio of tool rotational speed to welding speed leads to an increase in the degree of deformation which results in a reduction in the recrystallized grain size.
Evangelista, TEM analysis of a friction stir-welded butt joint of Al-Si- Mg alloys, Materials Chemistry and Physics 81 (2003) 289-292