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Taking the high cost of activated carbon into consideration, researchers have shown great interests in cheaper raw materials for the treatment of phenol, such as hyacinth ash, nonporous carbon and dried sludge [5, 6] .
Pinus massoniana, widely distributing along the Yangtze River in China, is often used as raw materials for biochar producing, which is widely used to get warm in countryside.
[2] Özkaya, B: Journal of hazardous materials.
,Plada, C. and Cordero, T: Journal of colloid and interface science.
Journal of the American Chemical Society.

Younan: Journal of Materials Processing Technology 55 (1995) p. 199
Lin: Journal of materials science 32 (1997) p. 1741
Hashmi: Journal of Materials Processing Technology 92-93 (1999) p. 1
Ozdin: Journal of Materials Processing Technology 183 (2007) p. 301
Omar: Journal of Materials Processing Technology 201 (2008) p. 662

J.Gu: Materials Science and Engineering Vol. 21 (2003), p.117 [6] P.J.Meadows, E.Lo´pez-Honorato and P.Xiao: Carbon Vol. 47(2009), p. 251
Delgass: Journal of Material Science Vol. 28(1993), p. 601 [9] J.Liu and J.
[10] Y.Li and S.Hu: Materials Science-Poland Vol.27 (2009), p. 453 [11] B.
Bogoeva- Gaceva and D.Burevski: Journal of Materials Science Vol.30 (1995), p.3543 [16] Q.Wu, H.F.Chen and D.
Pan: Polymeric Materials Science ＆ Engneering Vol.18 (2002), P. 147 [17] M.

Magnesium, as a kind of lightweight engineering material whose reserves is considerable abundant in the earth, is green environment-friendly materials for the 21st century.
Summary of common thermal conductivity material As electronic products with materials required to have low density, high strength, high impact resistance, electromagnetic shielding, heat, easy recovery characteristics, the conventional electronic equipment widely used in plastic and aluminum materials have been difficult to meet their requirements.
Journal of Materials Science Letters, 1996, 15: 369-371
Journal of Alloys and Compounds, Vol. 487, No.1, 2009, pp.560~563
Journal of Rare Earths, 1997, 15(1): 45-61.

Li: Pressure vessel Vol. 35 (2018), p. 54-58 [5] Michael F McGuire: Advanced Materials & Processes; Vol. 166 (2008), p.58 [6] K.
H: Materials Science and Engineering Vol.
Simmons: Materials Science and Engineering Vol.
Hanawa: Materials Transactions Vol. 12 (2002), p. 3100-3104 [15] D.
Liu: Key Engineering Materials Vol 775 (2018), p. 454-458 [16] V.

Feedstock materials were submicrocrystalline powders of dysprosia Dy2O3 and zirconia ZrO2.
The obtained results showed that these materials are very attractive for the top ceramic materials for thermal barrier systems [8-13].
Acknowledgments This work was supported by Institute of Materials Science of Silesian University of Technology, as a part of Statutory Research no BK232/RM3/2014.
[13] Maloney M.J., Thermal barrier coating systems and materials.
[15] Cao X., Ma Z., Liu Y., Du Z., Zheng K., Rare Metal Materials and Engineering 42 (2013) 1134

This means that the tools should be made using materials resistant to hot oxidation [6].
Park, Satoshi Hirano, Stir zone microstructure of commercial purity titanium friction stir welded using pcBN tool, Materials science and engineering A, 488 (2008) 25-30
Satoh, Mechanical properties of high purity polycrystalline cBN synthesized by direct conversion sintering method, Journal of materials science, 35 (2000) 1181-1186)
Ramulu, Identification of process parameters for friction stir welding Ti-6Al-4V, Journal of engineering materials and technology, 132 (2010)
Bahemmat, Investigations on the effects of the tool material, geometry and tilt angle on friction stir welding of pure titanium, Journal of materials engineering and performance, 19 (2010) 955-962

The crystallite size of materials was confirmed by X-ray diffractometry (XRD).The absorbance of chitosan-ZnO nanocomposite was confirmed by UV-vis Spectroscopy.
The surface morphology of prepared materials was analysed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM).
The surface morphology of prepared materials was analysed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM).
Journal of Material Science, 38, (2003) 2199–2204
Journal of Material Chemistry, 9, (1999) 2871–2878

The material reaches the limit equilibrium state of stress, and the original material balance is destroyed.
The result is shown in Fig.3 Resistance (kN) Depth(mm) Fig.3 The change of the resistance Fig.4 Internal structure without changes Fig.5 Internal structure with changes In the process of preparing experiment, tracing materials and tackifier are distributed uniformly in the material pile.
Sand belongs to loose material.
Journal of Jiangxi University of Science and Technology,1985,(3):1-11
Study on calculational method of loading resistances for wheel loader[J].Journal of Henan Polytechnic University(Natural Science), 2007, 26(3): 295-301

Badawi* Physics Department, Faculty of Science, El-Minia University, Egypt *e-mail : emadbadawi@yahoo.com Keywords: Positron Annihilation Spectroscopy; Doppler broadening line-shape parameters; AlCu alloys; Trapping rate; Grain size Abstract Positron Annihilation Spectroscopy (PAS) is a powerful and versatile tool for the study of the microscopic structure of materials.
PAS is one of the sensitive non-destructive nuclear techniques used in material science.
Positron lifetime spectroscopy is based on the fact that positron annihilation is proportional to the electronic density at the annihilation site and so it can provide information about the electronic densities in materials.
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