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Pasta.[5] studied fatigue cracks growth through particulate clusters in polycarbonate materials.
Therefore shocks to PC materials and workpieces should be avoided.
Ranganathaiah, Influence of gamma irradiation on the formation of methanol induced micro-cracks in polycarbonate, Journal of Materials Science, 2003, 38, 1431- 1438
Pasta, Fatigue crack growth through particulate clusters in polycarbonate materials, Engineering Fracture Mechanics, 2011, 78, 397-411
Ding et al., The laminated cracking mechanism for polycarbonate thin-wall part, Polymer Materials Science and Engineering, 2008, 24(11), 115-118

Kang* School of Materials Science and Engineering, Chonnam National University, Gwangju, 500-757,Korea ( E-mail : skhong@chonnam.ac.kr) * Materials & Components R & D Team, Korea Institute of Industrial Technology, Gwangju, 500-460, Korea Abstract It has been well known the effect of ion-bombardment is controlled by self-bias voltage around a substrate, and it is increased by high RF power and vacuum, but decreased with a substrate size.
Introduction Physical vapour deposition(PVD) there are two fundamental transfer processes of the coating material into the vapour phase: evaporation and sputtering.
Metal oxide like as TiO2, SiO2, Al2O3 ZrO2, Ta2O5 etc. films are generally evaporated with suboxide TiO, SiO…by electron beam heating and then the dissociated materials are partly recombined during codensation.
Rahman, et al.: Journal of physics and chemistry of solids 60(1999), pp. 201 [6] S.
Moon, etc al., "Optical and Microstructural properties of TiO2, Al2O3 and SiO2 single layers deposited by plasma assisted E-beam evaporation" Materials Science Forum, Vol. 449-452, (2004) pp. 961-964,

Theoretical and Experimental Studies on Stresses in Vacuum Glazing Due to Temperature Difference Xiaogen Liu1,a, Yiwang Bao2,b State Key Laboratory of Green Building Materials, China Building Materials Academy, 100024, Beijing, P.
Solar Energy Materials & Solar Cells,91(2007).P. 290–303 [2] X G Liu，Y W Bao，X F Wang，et al.
Materials Science and Engineering (B),Vol.138(2007).P. 128-134
Construction and Building Materials,23(2009).P. 1378–1388
Stresses in Vacuum Glazing Fabricated at Low Temperature.Solar Energy Materials & Solar Cells,91(2007).P. 290–303

The Ni-coated carbon nanotubes would be good candidates for microwave absorber and EMI shielding materials.
The Ni-coated carbon nanotubes would be good candidates for microwave absorber and EMI shielding materials.
The Ni-coated carbon nanotubes would be good candidates for microwave absorber and EMI shielding materials.
Lieber: Science 291 (2001), p. 630
Stonier: SAMPE Journal 27 (1991), p. 9

There is a thin layer of material with less solid content between the pipe wall and the inner bulk material.
The inner bulk material is almost at the same speed.
The surface magnetic field of the neodymium iron boron magnet is usually more than 400mT which is dozen times that of ordinary magnetic materials.
In Chinese [2] Miao Wu, Jie Chen, and Na Zhang: Chinese Journal of Scientific Instrument Vol. 29 (2008), p. 1450.
In Chinese [7] Lingyuan Ji: SNR of Photoelectric Sensor in Laser Airborne Particle Counter, Master's degree thesis, Nanjing University of Science and Technology (2009).

Halimi1, d 1 Laboratory of Characterization and Instrumentation, Technical and Scientific Research Center for Welding and Control, BP 64, Road of Dely Ibrahim, Cheraga, Alger, Algeria 2 Physics Laboratory of Materials, University of sciences and technology Houari Boumedienne BP 32, El Allia - Bab Ezzouar, 16111 Algiers, Algeria asatourabida@yahoo.fr, bfboubenider@yahoo.fr, calibadidi@yahoo.fr, dhalimir@yahoo.fr Keywords: Lamb waves, Sandwich structure, Dispersion curves, Displacements.
At present, many works are dedicated to the control of composite materials [1, 2, 3].
Sandwich composites are no homogenous and anisotropic materials, so, the attenuation of ultrasonic waves increases very much at high frequencies.
Rose: Journal of Composite Materials, Vol. 37, No. 10/2003 [3] N.
Takatsobo: Composites Science and Tchnology Vol. 64 (2004), p. 1293-1300 [4] R.

They may have a great potential in application related to sensors, catalyst, coating materials, optical devices, pigments, dielectric ceramics, bonding agents, and miniaturization of devices [1,2].
Among them, the sol gel synthesis is a powerful method for the design of new materials based on the hydrolysis and condensation reactions of molecular precursors such as metal alkoxides[6].
Mech. 4, (2001), p. 134 [3] Mayo M.J., High and low temperature superplasticity inNanocrystalline materials, NanoStmctured Materials, Vol. 9. (1997) p. 717 [4] Mayo M.J., Hague D.C., Using superplastic flow to process nanocrystalline ceramics, The Minerals, Metal and Materials Society (1997), p. 31 [5] Mayo M.J., Hague D.C., Chen D.
-J., Processing nanocrystalline ceramics for applications in superplaticity, Materials Science and Engineering A166 (1993), p. 145 [6] Mackenzie, J.D.
,Sol-Gel Research-Achievements Since 1981 and Prospects for the Future, Journal of Sol-Gel Science and Technology 26 (2003), p. 23 Fig.5.

Progress in Materials Science 49 (2004) 389-410
Materials Science Forum 690 (2011) 53-56
International Journal of Materials Research 103 (2012) 948-954
Materials Science and Engineering A 316 (2001) 11-17
Materials Science Forum 765 (2013) 23-27.

The fighter planes of the fifth generation, as compared to the fourth, has increased the composite materials use since high mechanical properties enhance the operational performance.
However, composite materials present some negative characteristics such as damage progression, leading to delamination or matrix failure.
Materials and Methods Experimental test was performed on some real specimens of the upper skin composite of Eurofighter aircraft obtained from Alenia-Aermacchi Company (see fig. 2) [4] & [5].
Acknowledgment We are gratefully toward Flight Experimental Centre, Chemical and Materials Section of Italian Air Force since provider of the specimens under experimental test and again, even to supply results and documents about NDT on composite panels.
References [1] Abdallah E.A. et al., Experimental analysis of damage creation and permanent indentation of highly oriented plates, Composites Science and Technology, 69 (2009) 1238-1245

The obtained gel-like materials were dried in air.
The X-ray powder diffraction patterns of the materials were recorded on a MAC Science MXP3 diffractometer using CuKα radiation at 40 kV and Title of Publication (to be inserted by the publisher) 20 mA, a monochrometer.
So the apatite adsorptive materials included in the apatite cake may be released into solution for a certain period.
References [1] C.Rey, A.Hina, A.Tofighi, and M.J.Glimcher: Cells and Materials, Vol.5 (1995), p.345
Sci, Materials in Medicine, Vol.4 (1993) , p. 127