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Introduction Tungsten and molybdenum are rare metal, which are the major components of many important metal materials, including tungsten carbide, special steel, catalyst, and tungsten wire, etc.
Experimental Materials.
Li: International Journal of Refractory Metals and Hard Materials. 28 (2010) No.4, p. 503
Zhang: Membrane Science and Technology. 18 (1998) No.1, p. 51.
Liu: The Chinese Journal of Nonferrous Metals. (2013) No.5, p. 1463.

Introduction Neoprene foam is of light weight, low thermal conductivity, and good chemical resistance, can be widely used in aircraft and automobile parts, sports equipment and thermal insulation materials.
Irgen, Mechanics of Composite Materials, vol.31 (1995), p.588 [6] H.
Ohnishi, Journal of Mechanical Science and Technology, vol.21 (2007), p.1677 [7]B.
Poompradub, Journal of Sol-Gel Science and Technology, vol.52(2009), p. 219 [11] S.
Lopez-Manchado , European Polymer Journal, vol.44(2008), p. 3493 [13] J.

Figure 1 The reaction mechanism of epoxidation of the oil Materials.
We are also grateful for the supports of Key Discipline on Wood Science & Technology in Yunnan Province, Program for Innovative Research Team (in Science and Technology) in University of Yunnan Province, and Biomass Materials Engineering Research Center in University of Yunnan Province, China.
Chen: Journal of Chemical Engineering of Chinese Universities, Vol.23 (2009), p. 116.
Liu: The Chinese Journal of Process Engineering, Vol.10 (2010), p. 714.
Liu: Chinese Journal of Applied Chemistry, Vol.27(2010), p. 27.

Introduction Cuprous oxide, Cu2O, is one of the most promising materials to be applied as a p-channel material for transparent thin-film transistors (TFTs).
Strontium titanate SrTiO3 (STO) is known as one of the best characterized perovskite class materials; it has a cubic crystal structure with the advantage of a high dielectric constant of er = 300 for bulk material at room temperature.
Journal of Crystal Growth, 2009. 311(4): p. 1102-1105
Journal of Physics D: Applied Physics, 2011. 44(37): p. 375102
Journal of Physics D: Applied Physics, 2008. 41(12): p. 125407

A, B, C, m and n are material parameters.
Table 1 reports the material constants obtained by Qunlin Cheng [6].
Ni, Modeling and analysis of micro scale milling considering size effect, micro cutter edge radius and minimum chip thickness, International Journal of Machine Tools and Manufacture 48 (2008)
DeVor, On the modeling and analysis of machining performance in micro end milling, part II: cutting force prediction, ASME Journal of Manufacturing Science and Engineering, 126 (4) (2004)
Catastrophic thermo plastics shear [J] .Journal of Applied Mechanics, 86(5) (1964).

Furthermore, the other factors, such as material properties and spot diameter, would also lead to the change of powder utilization ratio.
International Journal of Machine Tools & Manufacture, Vol. 45(11) (2005), p. 1288-1294
Journal of Shenyang University of Technology, Vol. 33(3) (2011), p. 259-264.
Journal of Materials Processing Technology, Vol. 142(2) (2003), p. 582-585
Materials Science and Engineering: A, Vol. 360(1-2) (2003), p. 18-25.

Trakia Journal of Sciences, 3(7), 1-6
Popovich // Materials Science . – 2014.– Vol. 50, 3. – pp. 377–380
Popovich // Materials Science . – 2014.– Vol. 50, 3. – pp. 377–380
Diagnostics of materials, (2), 41-49
"Fatigue of materials and structures in the 20th century: state-of-the-art," Materials Science. - 2003. – 39, №. 3.

Sic based ceramic foams reinforced by in-situ mullite whisker Xiaoli Ji1,a,Fei Xu 2,b,Haiya Chen3,c 1Key Laboratory of Silicate Materials Science and Engineering Wuhan University of Technology, Wuhan 430070,China ajxl@whut.edu.cn bXufeixf2000@yahoo.com.cn Keywords: silicon carbide, ceramic foams, mullite whisker Abstract.
Experiment procedure Mixed the raw materials to prepare water-based slurry.
Major phase of sintered sample is mullite, showing reactions among materials of 1 # sample basically synthesized mullite phase. 3.2.
References [1] Zhu XW: Journal of inorganic materials,Vol.16(2001),P.889 [2] Guan Zhengzhuo: Physical properties of Inorganic Materials (TsingHua University Press, Beijing 2002)
[3] Shuqiang Ding:Journal of the European Ceramic Society,Vol.27(2007),P.2098 [4] Larsor D R:J.Am.Cream.Soc.Vol.10(1947),P.417 [5] Sui wanmei: Journal of materials,Vol.14(2002):P.35

Actually, the cementitious materials has been changed from simple cement to admixture of cement and fly ash.
The water-binder ratio obtained in step 3 can be used to calculate through to ask formula , combining formula ，and can be obtained, and then dosage of cementitious materials and water can be obtained through their density, The density of cementitious materials can be calculated by formula as , , are quality ratio of cement and fly ash in cementitious materials respectively. 4.
Journal of the Chinese Ceramic Society. 28（2009）194-198
Journal of Building Materials. 13（2010）705-710 [7]Liu Guangtong, Zhang Baosheng, Yuan Jie, etc, Discussion of mix proportion design method based on the optimum paste-aggregate ratio,J.
Journal of the Chinese Ceramic Society. 34（2006）1026-1030 [9]Mehta P.

Copper metal is used in different applications such as capacitor materials, conductive coatings; Conductive inks; conductive pastes; high thermal conductivity materials; lubricant additives, sintering additives, the superficial conductive coating processing of metal and non-ferrous metal, medicine append material, raw material for bulk nanomaterial.
There have been several studies on the recycling of materials by mechanical [6], thermal [7] and chemical [8]-[9] processes, but most of them dealt with recovery of one or two specified materials of all PCB compositions.
Experimental Materials and Methods.
Williams, Separation and recovery of materials from scrap printed circuit boards, Resour.
Materials letters, Vol. 59(14-15}1760-1763, 2005 [15] Mahmoud A.