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[3] Composite Materials Handbook Volume 1.(1997)
[8] Rajiv Asthana, Narendra Dahotre, Ashok Kumar, “Material science in Manufacturing”, pp.409,(2006)
Li & Mimi Keating, “Morphology And Crystallization Behavior Of HDPE/CNT Nanocomposite”, Journal of Macromolecular Science, Vol.13, pp.231–245, (2006)
“The Behavior of Structures Composed of Composite Materials”,(2004)
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Heywood, Size effect in fatigue of plain and notched steel specimens, WEP 65 (1951), 113-124 [5] X-S Wang, X Lu, D-H Wang, Investigation of surface fatigue microcrack growth behavior of cast Mg-Al alloy, Materials Science and Engineering A364 (2004), 11-16 [6] A.
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Materials Letters, 1996, 27(7): 343−347
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Theoritical overview Cold spray as a coating technology initially developed in the mid1980s at the Institute of Theoretical and Applied Mechanics of the Russian Academy of Sciences in Novosibirisk.
The Russians scientist successfully deposited a wide range of pure metals, metallic alloys, polymers and composites onto a variety of substrate materials and they demonstrated that very high coating deposition rates are attainable using the cold spray process [5].
[5] M.Grujicic, Z.L.Zhao, W.S. deRosset, D.Helfritch, Adiabatic Shear Instability based Mechanism for Particle/substrate bonding in the cold-gas dynamic-spray process, International Journal Materials & Design, Vol 25, (2004),pp. 681-688
[7] V.K.Jr.Champagne, D.Helfritch,P.Leyman,S.Grendahl,B.Klotz, Interface material mixing formed by the deposition of copper on aluminum by means of the cold spray process, International Journal of Thermal spray technology, Vol 14 (3), (2005), pp 330-334
[11]O.Nooririnah,A.Y.Khalil,M.S.Aludin,A.Rohana,R.R.Zuraidah, Overview potential applications of cold spray process for aviation industry in Malaysia, Advanced Material research Journal, Vol.701, (2013), pp 372-375

Sol-gel process is a wet-chemical technique widely used in the fields of materials science and ceramic engineering [4], for example, the synthesized of a wollastonite-titania material [5].
Table 1: Compositions of the raw materials.
Materials Characterization 61 (2010) 1281-1285
Materials Characterization 62 (2012) 47-55
Materials Letters 58 (2004) 2350– 2353

Compared with Industrial Modelling Design of Automobiles and Man-Machine Engineering, the VRT could save enormous manpower and the material resources.
Designers can sit in a virtual car interior, visual observation of the car interior materials, lighting, and can also steering wheel, joystick and other ancillary accessories manual operation.
[2]GUAN Xue-feng,Virtual reality technology in the application of the vibration problem[J] Journal of North University of China (natural science edition), 2010, 4: 022
Friends of the science: in late, 2012 (12): 9-10
Journal of Tongji university( Natural science edition) : 2013, 41(10): 1562-1566

Mechanical Engineering Materials [M].
Materials & design, 2007, 28(1): 101-111
Science and Technology,2015(13):82
Material constitutive equation and knife-chip friction characteristics for numerical simulation of metal cutting process[J].Journal of Sichuan University (Engineering Science Edition), 2012,44(06) ):181-18
Materials & Design, 2014,63:798-804 [16] Sun SY, Lv WJ (2016) Microstructure and Mechanical Properties of TC18 Titanium Alloy.

Introduction Nowadays, nanotechnology is essential for the development of novel materials useful in the engineering and medical sector.
Nair, and Henu Kumar Verma, Nanotechnology based drug delivery system: Current strategies and emerging therapeutic potential for medical science, Journal of Drug Delivery Science and Technology 63 (2021): 102487. 10.1016/j.jddst.2021.102487
Review of current findings, challenges and future perspectives, International Journal of Nanomedicine 16 (2021): 5713. 10.2147/ijn.s327334 [3] Ha, Juyoung, Novel Applications of Nanoparticles in Nature and Building Materials, Novel Nanomaterials; IntechOpen: London, UK (2021): 331
Extract by microwave method and its prophylactic effects on Toxoplasma gondii infection, Saudi Journal of Biological Sciences 28, no. 11 (2021): 6454-6460. 10.1016/j.sjbs.2021.07.007 [24] Ramesh, P., K.
Beena, A novel greener synthesis of ZnO nanoparticles from Nilgiriantusciliantus leaf extract and evaluation of its biomedical applications, Materials Today: Proceedings 46 (2021): 3062-3068. 10.1016/j.matpr.2021.02.498 [27] Naser, Rania, Rana Abu-Huwaij, Iqbal Al-khateeb, Manal M.

These properties make GaN one of the most promising materials in optoelectronic, high temperature and high power devices.
Acknowledgment This work is supported by Special Funds for Major State Basic Research Project（2006CB6049）,  National Nature Science Foundation of China (60721063， 60676057，60731160628, 60820106003，60990311，60906025)，The nature science foundation of Jiangsu province(BK2008019，BK2009255) ，the  Research Funds from NJU-Yangzhou Institute of Opto-electronics.
“Effect of reactor geometry and growth parameters on the uniformity and material properties of GaN/sapphire grown by hydride vapor-phase epitaxy,” Journal of Crystal Growth, vol. 182, May. 1997, pp. 233-240
Simulation of gas flow in horizontal HVPE reactor and GaN growth.Journal of functional Materials and Devices, vol. 9 ,Dec. 2003, pp. 469-472
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