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Thickness Effect of ZnO Film on the Performance of Photocatalytic in a p-NiO/n-ZnO Heterostructure Under Solar Light Irradiation HIchem FARH1,2,a*, Abdelouahab NOUA1,b, Rebai GUEMINI1,c, Djamal Eldine GUITOUME3,d,  Oussama ZAOUI4,e 1Laboratory of Active Components and Materials, Larbi Ben M'Hidi University, Oum El Bouaghi 04000, Algeria 2Department of Material Sciences, Faculty of Exact sciences, LarbiTébessi University, Tébessa, 12002, Algeria. 3Research Unit in Optics and Photonics (UROP-CDTA), El Bez, Sétif1 University, Sétif, Algeria. 4Department of Material Sciences, Faculty of Exact sciences, Tahri Mohammed University, Bechar, 08000, Algeria.
The photocatalytic experiments were carried out at room temperature in sunny days of November from 9 AM to 2 PM at the Laboratory of Active Components and Materials (Larbi Ben M'hidi University, Oum El Bouaghi, Algeria).
Soleimanpour et al reported that when the thickness of film increased the grain size also increased and film coverage improved which caused a higher dispersion of the incident light [30] .
Zhang et al [31], and based on Alzahrani et al [32] research found that 200 nm is the optimal thickness of the ZnO for the NiO/ZnO heterojunction optimal properties[32], we conclude that’s why S6 presents the best photocatalytic activity because the thickness of S6 is the closest to 200nm and that give the NiO/ZnO heterojunction the optimal electrical properties, Kaneva et al [33] also reported that’s ZnO films with 7 coats have better photocatalytic efficiency compared to less coating number (1, 3 and 5).
The authors are very grateful to Active Devices and Materials Laboratory, Oum el Bouaghi University, Algeria.

Chemical Composition of Base material and Fillers [6][7] Type Mn Fe Mg Si Cu Zn Ti Cr Al (AA6082-T6) Base material 0.04- 1.00 0.00- 0.50 0.60- 1.20 0.70- 1.30 0.00- 0.10 0.00- 0.20 0.00- 0.10 0.00- 0.25 Balance %(4043) Filler Wire 0.05 0.08 0.05 5.0 0.3 0.1 0.2 - Balance %(5356) Filler Wire 0.15 0.11 5.0 0.06 0.01 0.01 0.07 0.07 Balance Table 2.
Tensile properties I(A) Filler Wire UTS 1 (MPa) Failure Location 0.2% (MPa) %EL UTS 2 (MPa) 0.2% (MPa) Failure Location %EL 120 4043 32.4 WM 21.4 3.2 50.4 37.9 WM 3.5 5356 102.1 WM 37.8 4.3 99.1 25.5 WM 2.7 140 4043 165.0 HAZ 138.6 11.5 170.5 141.1 HAZ 8.0 5356 153.0 HAZ 115.3 12.0 160.0 120.4 HAZ 7.5 Conclusion The work can be concluded as follows. 1.
Welding repair by TIG process is possible with 140A Reference [1] B.V.R.Ravikumar .K.Swathi ,B.L.N.Krishana Sai “Mechanical and Micro Structural Characterization of Al 5083 and Al 6082 Butt Joint Made BY GTAW “International Journal of Innovative Research in Science,Engineering and Technology , (An ISO 3297: 2007 Certified Organization) Vol. 3, Issue 12, December 2014 [2] DongxiaYang, Xiaoyan Li, Dingyong He, Zuoren Nie, Hui Huang “Microstructural and mechanical property characterization of Er modifiedAl–Mg–Mn alloy Tungsten Inert Gas welds” Materials and Design 34 (2012) 655–659 [3] The Aluminium Automotive Manual, Version 2002 © European Aluminium Association (auto@eaa.be) [4] R.R.

El Achouri et al. studied the corrosion inhibition of iron by alkanediyl-α,ω-bis-(dimethylalkyl ammonium bromide) in 1M hydrochloric acid and revealed that these gemini surfactants adsorbed on the iron surface according to the Frumkin isotherm model[3,4].
El Achouri, M.S.
[4] M.El Achouri,S.Kertit,H.M.Gouttaya, B.

Beauger et al. [5,6,7] was proposed a model for the reaction of BaTiO3 from BaCO3 and TiO2 precursors as follows: BaCO3 + TiO2 BaTiO3 + CO2 (1) BaTiO3 + BaCO3 Ba2TiO4 + CO2 (2) Ba2TiO4 + TiO2 2BaTiO3 (3) This procedure is a low cost technique.
El-Sayed Ali, S.M.El-Raghy and S.El-Houte, Formation mechanism of barium titanate by solid-state reactions, International Journal of Scientific & Engineering Research, Vol.5, Issue 7, (2014) 1460-1465

Higher % E.L. and % R.A. with modified heat treatment cycle indicates better toughness.
(MPa) % EL 25 mm GL % RA 335oC/3hrs 1295-1313 1191-1238 2-3 4-7 400oC/3hrs 924-962 749-774 15.8-17.8 40-48 425oC/3hrs 824-877 637-696 19-21 49-55 The samples aged at 335°C / 3 hrs and 400°C / 3 hrs show RT (room temperature) impact energy of 8 J and 28 J respectively.
Behjati et. al. have reported similar dispersion of precipitate [7].
It yields 0.2 % Y.S of 761 MPa, UTS of 943 MPa, % EL of 16 and % RA of 44.

PCD tool is more suitable for cutting Al 2124 SiC(45%wt) PMMC.
Round bar of Al 2124 SiC (45% wt) PMMC 40.0 mm diameters and 78 mm long.
It is observed that Al 2124 SiC (45%wt) PMMC produce discontinuous chip.
Rao, Machinability issues in turning of Al/SiC(10p) Metal Matrix Composite.
El-Gallab, M.

Evaluation of Antioxidants, Pigments and Secondary Metabolites Contents in Spirulina platensis Hamdy Elsayed Ahmed Ali1,a, Sanaa Mahmoud Metwally Shanab2,b, Mervat Aly Mohamed Abo-State3,c, Emad Ahmed Ahmed Shalaby4,d, Usama Mohamed Nour El Demerdash1,e, Mohd Azmuddin Abdullah1,f * 1Department of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia. 2Department of Botany and Microbiology, Faculty of Science, Cairo University, 12613 Giza, Egypt. 3Department of Microbiology, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Egypt. 4Department of Biochemistry, Faculty of Agriculture, Cairo University, 12613 Giza, Egypt.
Mostafa and N.S.El-Gendy, Evaluation of fuel properties for microalgae Spirulina platensisbio-diesel and its blends with Egyptian petro-diesel, Arab.
El-Masry, S.
Ibanez, et al..., Screening of Functional Compounds In Supercritical Fluid Extracts from Spirulina Platensis.
Ledon, et al..., C-Phycocyanin A Biliprolein With Antioxidant, Anti-Inflammatory and Neuroprotective Effects.

Hierarchical Clustering of Surface Roughness Using Acoustic Emission Signals Zvikomborero Hweju1,a, Khaled Abou-El-Hossein2,b* 1Ultra-High Precision Engineering Research Unit, Department of Mechatronics, Nelson Mandela University, Port Elizabeth, South Africa.
as219146578@mandela.ac.za, bKhaled.Abou-El-Hossein@mandela.ac.za Keywords: Clusters, Purity, Surface Roughness and Acoustic Emission Signals.
Garikapati et. al. [8] utilized the agglomerative hierarchical clustering and K-Means in clustering Material Removal Rate (MRR), Kerf Angle (KA) and Surface roughness profile (Ra) during machining of AlSi7/63% of SiC hybrid composite.
In yet another study, Torabi et. al. [9] successfully utilized the clustering technique in online monitoring of tool condition and faults diagnosis during high-speed milling processes.
Abou-El-Hossein, "Surface Roughness Prediction Based on Acoustic Emission Signals in High-Precision Diamond Turning of Rapidly Solidified Optical Aluminum Grade (RSA443)," Key Engineering Materials, vol. 841, pp. 363-368, 2020

El Kady2,b, Mohamed M.
El Kady, M.M.
El Kady, M.M.
El Kady, M.M.
Kottcamp, et.al, ASM handbook, 3 (1992) 692 [14] Y.

Zhou, et al: Acta Mater.
Lin, et al: Appl Phys Lett.
Beaven, R.Wagner, et al: Scr.
El-Raghy, M.W.
El-Raghy: J.