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Materials Science & Engineering C-Materials for Biological Applications (2011), p. 1405-1411
Advanced Materials, 2010
Brazilian Journal of Physics (2006) p. 1318-1343
[18] Soler, J.M., et al., The SIESTA method for ab initio order- N materials simulation.
Journal of Physics: Condensed Matter (2002), p. 2745

Prakash: International Journal of Engineering Science and Technology Vol.2 (2010), p. 625
Dwarakadasa: Journal of Material Science Letters Vol. 11 (1992), p. 1543
Kosec: Materials and Geoenvironment Vol. 54 (2007), p. 331
Liu: Materials Science and Technology Vol. 22 (2006), p. 86
Hashmi: Journal of Materials Processing Technology Vol. 56 (1996), p. 552.

For materials whose tensile strength and compressive strength are different, in the field of strength calculation standards, it needs two material strength coefficients, namely the tensile ultimate strength ft and the compressive strength limit fc.
In the unified strength theory, if taking tension-compression ratio of materials α=1, unified strength theory was reduced to unified yield criterion.
This formula is not only applicable to metal material of same tension-compression ratio, also is applicable to a large number of materials of different tension-compression ratio.Compared the results of the paper with the literature tests，both coincide in good condition.
Journal of Structural Engineering, 2004, 130(2): 180-188 [8] Li Xiao-wei, Zhao Jun-hai.
Beijing:Science Press,1982.

Introduction Surface roughness in high precision machining materials becomes more important especially in lens and optics industry.
It has the highest oxygen permeability value compared to all available lathe cut hydrogel materials which is achieved from an exclusive blend of fluorosilicone and hydrophilic monomers.
Conclusion This experimental study was performed to investigate the surface roughness obtained in diamond machining of advanced polymeric materials used for making contact lenses.
Li: Journal of Industrial Technology, 15 (1), (1998), pp.1-6
Vinayagam: Arabian Journal for Science and Engineering 36 (7) (2011), pp.1407-1422.

Jin, Journal of Inorganic Materials. 2008, 23(2):387-392(in Chinese) [7] Z.Q.
Gao, Q.H Shen, et al, Rare Metal Materials and Engineering, 2008, 37(Suppl.2):62-65(in Chinese) [8] X.J Yan, S.L.
Ding, Chinese Science Bulletin. 2001, 46(4):265-273 [16] J.P He, Z.
Shen,et al, Journal of Inorganic Materials, 2009, 24(1):43-48(in Chinese) [17] Z.
Lu,et al, Journal of Colloid and Interface Science, 1999, 209:193-199 [18] China Environmental Protection Agency.

Research on friction property of the Ni/ZrO2 composite infiltrated layer on Cast Steel surface under high temperature Xian-ming SUN1,3,a*, Gui-rong YANG2,b, Lei WEI3, Yu-lan LIU1 1School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430073, Hubei, China 2State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050,Gansu, China 3WuHan Research Institute of Materials Protection, Wuhan 430030, Hubei, China awuhansunshine@163.com, b71548080@qq.com Keywords: Ni-based composite infiltrated layer; cast Steel; high temperature friction property Abstract: The surface composite layer Ni/ZrO2 on the ZG45 cast steel surface was fabricated through vacuum infiltration casting method.
The substrate material is ZG45.
The antithesis parts material was diameter Ø3mm Si3N4 ceramic ball.
(b) (a) (d) (c) (a) at room temperature (b) at 150°C (c) at 300°C (d) at 450°C Fig. 5 SEM photograph of the 15% ZrO2 composite infiltrated layer wear surface Acknowledgements The authors would like to acknowledge the financial support for this research provided by Educational Commission Science and Technology Research Project of Hubei Province of China (D20121506) and Educational Commission provicial colleges young teachers abroad project funding (2012).
References [1] X M Sun, G R Yang, W M Song, J Li, Y MA and Y Zhou: Journal of Wuhan University of Technology (Materials Science Edition), No.1 (2012), p.73-78 [2] G R Yang, Y Hao and W M Song: Materials Science and Engineering, Vol. 399(1-2) (2005), p. 206-215 [3] X M Sun: China Academy of Machinery Science & technology dissertation, (2011), p. 57-84 [4] T P Xuan and D Min: Effect or rare earth on micstrusture of vacuum melting Ni-based self-fluxing alby coatings, Journal of Rare Earths, Vol. 22 No. 4(2004) p.517-520 [5] J Y Zhang, G R Yang, Y Ma and H Wang: Hot Working Technology, Vol. 39 No. 3(2010) p.62-65

There are three kinds of materials used in this experiment: such as Mg, Mg-Y master alloys and Mg-Dy master alloys.
Li: Materials Science and Engineering Vol.
Ebert: Materials Science and Engineering Vol.
He: Journal of Rare Earth Vol. 21 (2003), p. 73-76 [4] B.
Ren: Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material Vol. 12 (2005), p. 540-544 O Mg Y Dy N Fig. 4 EDS analysis of oxide film section of Mg-0.5Y-5Dy Fig. 5 XRD analysis of oxide film surface of Mg-0.5Y-5Dy

Atmosphere plasma spray (APS) is a promising candidate for the porous electrodes due to its processing characters, and is suitable to rapidly deposit film for almost all kinds of materials [4].
The reduction of the electrolyte thickness aims at decreasing the working temperature of SOFCs in order to increase their life-time (depending on the mechanical and chemical stabilities of materials) and reduce the production costs.
Badwal: Journal Power Sources, Vol. 86 (2002), p. 68
Leach and R. vander Vorst: Journal of Power Sources, Vol. 101 (2001), p. 10
Wang: Functional Materials, Vol. 37 (2005), p. 573 (in Chinese)

The Size of the Friction Coefficient Depending on the Size and Course of Normal Load LABAŠOVÁ Eva Department of Applied Mechanics, IPSM, Faculty of Materials Science and Technology, Slovak University of Technology, Paulinska 16, Trnava, Slovak Republic eva.labasova@stuba.sk Keywords: coefficient of fiction, sliding pair, sliding velocity, normal load, bronze bushing Abstract.
To be able to define what mutual interaction of components made of same or different materials, which are in sliding motion to each other, will be like, it is essential to characterize the friction.
Parameter, characterizing resistance of surfaces of couple of bodies from same or different materials in process of friction is called coefficient of friction (m).
The force of friction has the direction of the tangent to the surface of journal (Fig. 1), [4].
J. of Engineering & Sciences. 11 (2011) 53-57

Krausmann et al. (2009) and Steinberger et al. (2010) reported that in 2005, cement-based materials represented about 30% of the total global materials use including fossil fuels and in 1950; cement-based materials represented only 7%.
Fig. 1: Estimated consumption of common materials in 2002–2005 (Scrivener et al., 2018) 2 MATERIALS AND METHODS 2.1 Materials Cement, sand, gravel, avocado ashes, eucalyptus ashes and water were the materials used in this study.
Journal of Materials and Civil Engineering 22 2011, 897-904
Journal of Materials Science Research, 5(2):23-32, 20. https://dx.doi.org/10.5539/jmsr.v5n2p23 [25] Udoeyo, F.F., Inyang, H., Young, D.T. and Oparadu, E.E. (2006).
ASCE Journal of Materials in Civil Engineering, 605-611