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El-Midany, “An assessment of the carbothermic reduction of ilmenite ore by statistical design,” J.
Al-Ruqeishi, R.
Al-Azri, “Direct growth and photoluminescence of silicon nanowires without catalyst,” Arab.

Shah, et al.
Kim, et al.
Lin, et al.
Gu, et al.
[18] El-Rehim, S., M.

El, IEEE Trans.
Umeda, et al, Appl.
Kimoto et al., J.
Nakazawa, et. al.
Cabello et. al.

[5] Zarina, Y., Al Bakri, A.
[42] El-Gammal, A., Abdel-Gawad, A.
K., El-Sherbini, Y., & Shalaby, A. (2010).
S., & Al-Mattarneh, H.
[73] Al-Akhras, N.

The use of sample G led to the production of a hydraulic binder, while the binder including sample S performed very well when cured in air but was not resistant in water [5].Zhou et al, prepared non-fired bricks from waste phosphogypsum by a novel process called " the Hydration-Recrystallization process" [6].Factories that produce phosphatic fertilizer and chemical industries in Abo-Zaabal,Cairo,Egypt, generate large quantities of phosphogypsum which is currently being disposed of by dumping into ponds or waste lands.
Ajam et al, studied the incorporation of phosphogypsum into the fired clay bricks.
[13] L.Ajam, M.Ouezdou, H.Felfoul, and R.El Mensi , Characterization of the Tunisian Phosphogypsum and its Valorization in Clay Bricks, Construction and Building Materials. 23(2009) 3240-3247

In order to study the wear behavior of composites, Vishwanath et al. [9] investigated the effect of reinforcement materials on the friction characteristics of fabric reinforced polymeric composites.
Besides, Mondelin et al. [11] found that the friction coefficient between carbon/epoxy composites and monocrystalline diamond is not sensitive to sliding velocity or contact pressure.
El Mansori: Compos.

[2] .Sandra, S.Anna, S.Zdenko, et al, Effect of addition of expanded graphite (EG) on the synthesis and characteristics of poly(ethylene terephthalate) modified with cycloheanedi-methanol (PETG), Polimery. 58 (2013) 893-899
[3] A.B.Martinez, N.Leon, D.Arencon, et al, On the effect of the different notching techniques on the fracture of PETG, Polymer testing. 32 (2013) 1244-1252
[5] K.A.El-Farahaty, A.M.Sadik, A.M.Hezma, γ-Irradiation effects on opto-thermal and -mechanical properties of PET and PETG fibers, International Journal of Polymeric Materials and Polymeric Biomaterials, 58 (2009) 366-383

SI F of t he mechani cal st ress f i el d 0 0. 5 1 1. 5 2 2. 5 3 0. 15 0. 25 0. 3 0. 5 0. 6 0. 7 0. 8 1 a/ mm K/ MPa*m1/ 2 cal cul at ed val ue acdami c val ue l oad 0 2 4 6 8 10 12 14 16 0 0. 005 0. 01 0. 015 0. 02 0. 025 0. 03 0. 035 t i me/ s val ue/ MPa Fig. 3 SIF of the mechanical field Fig.4 The approximation chart of the sine-wave According to the theory of rupture, when structure geometry, crack size and loads are taken into account, the equivalent SIF at the crack tip can be given as, 1 ( )ar a K aFσ π +=
Fig.5 The distribution of the dynamics stress Fig.6 Stress changing curve Fatigue Theory Analysis The material of this piston is AL-SI alloys, and its basic parameters of fatigue are: Kc=39.4MPa, C=2×10-8,m=3 [8].
On the basic of the document and the experiential data , the average doorsill value thK∆ of the AL-SI alloy is available as thK∆ =1.55MPam1/2.

[9] Adhoum N, Monser L, Sadok S, El-Abed A, Greenway GM, Uglow RF.
[16] Marcano DC, Kosynkin DV, Berlin JM, Sinitskil A, Sun Z, Siesarev A, et al.
[17] Fernandez-Merino MJ, Guardia L, Paredes JL, Villar-Rodil S, P.Solis-Fernandez, Martinez-Alonso A, et al.

In Ivana et. al article, they also stated that direct current sputtering could not happen to non-conductive material unless utilize high frequency type of sputtering which is usually at 13MHz operating frequency.
However, they had done the sputtering under lower frequency (1kHz ~10kHz) instead of high frequency contradicted to Ivana et al findings.
El-Assals, RF Planar magnetron sputtering and characterization of ferroelectric Pb(Zr,Ti)O3 films, Journal of Applied Physics 54 (1983) 6601-6610