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Introduction FGMs are a class of composite materials in which the material properties vary as a known function of spatial coordinates.
A great amount of work has been done in this field for the isotropic materials.
[2] Lekhnitskii SG, Anisotropic plates, second ed., New York, Gordon and Breach Science Publishers (1968)
[5] Kubair D.V. and Bhanu-Chandar B, Stress concentration factor due to a circular hole in a functionally graded panels under uniaxial tension, International Journal of Mechanical Sciences. 50 (2008) 732-742
International Journal of Solids and Structures. (2013).

This means that migration of materials is beneficial because larger material, but in terms of the geometric accuracy of the product can lead to decreasing of dimensional tolerances.
References [1] S Kumar1, R Singh, TP Singh, and BL Sethi, "Comparison of material transfer in electrical discharge machining of AISI H13 die steel", Journal of Mechanical Engineering Science, JMES1227 © IMechE 2009, Vol.223 Part C [2] Han-Ming Chow, Lieh-Dai Yang, Ching-Tien Lin, Yuan-Feng Chen, "The used of SiC powder in water as dielectric for micro-slit EDM machining", Journal of Materials Processing Technology, 2007
[3] P.Pecas, E.Henriques, "Electrical dioscharge machining using simple and powder-mixed dielectric: The effect of the electrode area in the surface roughness and topography", Journal of Materials Processing Technology, 200, 2008
[5] Yu-Lung Hwang, Chia-Lung Kuo, Shun-Fa Hwang, "The coating of TiC layer on the surface of nickel by electric discharge coating (EDC) with a multi-layer electrode", Journal of Materials Processing Technology, 210, 2010
[6] Yuan-Feng Chen, Yan Cherng Lin, "Surface modifications of Al-Zn-Mg alloy using EDM combined with ultrasonic machining and addition of TiC particles into the dielectric", Journal of Materials Processing Technology, 209, 2009

OPEFB-CP will act as reinforcement to glass materials in fabricating good and flexible scaffold composite materials.
However, the issue with ceramic based materials was related to its degradation rate.
These polymeric materials proved the advancement of modern health care.
The advancement in science and engineering has allowed the use of synthetic or natural polymeric materials to produce a better reinforcement to glass materials scaffold.
Materials Science 36, (2001) 2163–2172

Firuz2,d 1 Material Science, School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia 2 School of Materials Engineering, Universiti Malaysia Perlis 3 Nuclear Science, School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia asyed.nuzul@unimap.edu.my, blinda@ukm.my, shahidan@ukm.my, dfiruz@unimap.edu.my Keywords: sol-gel synthesis, hybrid material, silica xerogels, mesoporous, composite Abstract.
Because of that, sol-gel method permits the combination of the inorganic with organic materials to form a new class of material, which is called hybrid material.
The scope of this paper is to investigate the porous properties of the synthesized hybrid materials.
Journal Sol-Gel Science Vol. 8 (1997), p. 499–505
[15] Sato, S., Murakata, T., Suzuki, T., and Ohgawara, T : Journal of Material Science Vol. 254 (1990), p. 4880–4885.

A Study on Chemical Foaming Geopolymer Building Materials Tsung-Yin Yang*a, Chuan-Chi Chienb Green Energy & Eco-technology Center, Industrial Technology Research Institute, Taiwan, R.O.C.
Geopolymer materials and geopolymer cement blends can be used for a number of applications, such as resisting fire and acid, creating various structural materials, the immobilizing heavy metals, and bonding metal and ceramic surfaces.
Materials, Methods and Analysis The experimental procedure for preparing the foamed geopolymer is shown in Fig.1.
Davidovits, “Geopolymers: Man-made Rock Geosynthesis and the Resulting Development of very Early High Strength Cement”, Journal of Materials Education, Vol. 16, p. 91-137 (1994)
Davidovits, “MAS-NMR Studies of Geopolymers Heat-treated for Applications in Biomaterials Field”, Journal of Materials Science, Vol. 42, p. 3092-3098 (2007)

Zhu et al. investigated the best ratio of the mixture-abrasive honing stones in deep hole honing of difficult-to-cut materials[6].
Malkin: Journal of Engineering for Industry Vol. 115 (1993), pp: 406-414
Xiao: Key Engineering Materials Vol. 416 (2009), pp: 461-466
Fisher: International Journal of Machining and Machinability of Materials Vol. 5 (2009), pp: 60-79
Zhao: Proceedings of the 2010 ASME International Manufacturing Science and Engineering Conference.

Ordinary mechanical spring doesn’t have good linearity since it tends to be under the influence of the end ring effect, so the linear spring with rectangular cross-section is usually chosen which advantages are as follows: Firstly, it can use materials with larger cross-section than the round one to store more energy when its spiral outer diameter is under the space limitation.
Automation Journal. 2001, 21(5): 705-709 [3] Wang Quanyu, Wang Xiaodong.
Journal of Tsinghua University (Natural Science Edition).2008.48(11) :13-17
Chinese Journal of Scientific Instrument. 2001, (4): 409-411
Journal of Mechanical Design, 2006, 128: 199-206

Journal of Materials Science: Materials in Medicine 21(4): 1109-1120
Dental Materials, 2008. 24(3): p. 299-307
Journal of Materials Science: Materials in Medicine 16(4): 341-345
Journal of Materials Science Letters, 2001. 20(18): p. 1719-1722
Materials Science and Engineering: C, 2002. 20(1-2): p. 187-193

aolesyal89@mail.ru, bsvmamyachenkov@yandex.ru Keywords: Technogenic raw materials, hydrometallurgy, polymetallic ores, beneficiation, recovery.
The article reviews the need to involve poor raw materials in processing, presents the results of the information search on the processing of technogenic wastes from beneficiation.
The review of processing technologies for poor refractory raw materials was performed.
Mining Journal, 2 (2004) 83-86
Kozlov, Progressive technologies for complex and deep processing of natural and technogenic mineral raw materials: Proceedings of the International Scientific and Technical Conference ‘Combined Processes of Processing of Mineral Raw Materials: Theory and Practice’, St.

Therefore, porous ceramic is widely used in purification separation, gas or liquid filtration, catalyst carrier, special wall materials, heat preservation materials, biological materials, chemical energy storage materials, aviation materials etc.
Vol.26(2012), p.105 [2] K.Ikeda, H.Kinoshita, R.Kawamura, et al.: Journal of Solid Mechanics and Materials Engineering.
Vol.39 (2012), p.49 [5] Y.M.Zhang, D.K.Liu, J.C.Han, et al.: Ordnance Material Science and Engineering (in Chinese).
Vol.36 (2008), p.1775 [13] S.Zhao, Y.Liang, J.Y.Wu, et al.: Journal of Shenyang Jianzhu University (Natural Science) (in Chinese).
Vol.32 (2013), p.1389 [18] S.J.Kim, H.G.Bang, S.Y.Park: Materials Science Forum.