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The study of the electric erosion phenomenon of contact materials is significant to improve its service life and reliability[1-5].
In recent years, many researchers have been interested in the study of arc erosion, surface morphologies and material transfer phenomenon of noble metal alloy contact materials[6-9].
In order to study the arc erosion mechanism, the surface morphologies, microstructures and material transfer phenomenon of Pt-Ir-Zr alloy contact materials were carried out by electrical contact test machine and SEM in present paper.
Acknowledgment This work was financially supported by the Science and Technology Innovation Team of Kunming (2012-01-01-A-R-07-0005), Innovation Team of Yunnan Province(2012HC027) and the Province and University Science and Technology Cooperation Project of Yunnan Province(2012IB002).
Corresponding Author Saibei Wang, 77481311@163.com, 86-871-8328841 or +86 1580 886 3053  References [1] Wei Chen, Yi Zhen: Precious Metals No.33 (2012), p. 3 [2] Miaonong Chen: Electrical Materials No.2 (2005), p. 38 [3] Leung C L, Lee A: IEEE Transactions on Components, Hybrids, and Manufacturing Technology Vol. 14 No.1 (1991), p.101 [4] Choi Y S, Kim D L, Kim M S, et al: IEEE Transactions on Applied Superconductivity Vol. 21 No. 3 (2011) , p.1050 [5] Chi H L, Anthony L: IEEE Transactions on Components, Hybrids, and Manufacturing Technology Vol. 15 No. 2 (1992), p.146 [6] FRÉDÉRIC PONS, MOHAMMED CHERKAOUI, IDRISS ILALI and SERGE DOMINIAKE: Journal of ELECTRONIC MATERIALS Vol. 39 No. 4 (2010), p.456 [7] Rong M Z, Zhao Z Y, Yang W: Low Voltage Apparatus No. 5 (1998), p.1 [8] Deng Z M, Lu Y Shi A, et al: The Chinese Journal of Nonferrous Metals Vol. 11 No. 2 (2010), p.144 [9] Fangfang Liu: Precious Metals Vol. 28 No. 3 (2007), p.24 [10] Jing Li: Low Voltage Apparatus No.9 (

A Brief Review of Organic Solar Cells and Materials Involved in Its Fabrication.
Materials Today: Proceeding. 56: 3826-3829 [2] Ghorab, M., Fattah, A., and Joodaki, M. 2022.
In IOP Conference Series: Materials Science and Engineering (Vol. 541, No. 1, p. 012018).
Materials Research, 14, 552-559
International Journal of Electrochemical Science, 16(11), 211149

The notion of defects in PPy bulk material has never been demonstrated before.
Gu, et al: Progress in Polymer Science, Vol.36 (2011) No.10, p.1415 [2]Dhibar S., Sahoo S.
:Journal of Applied Polymer Science.
Wan: Journal of Materials Chemistry, Vol.11 (2001) No.2, p.404 [16] J Bhadra, D Sarkar: Indian Journal of Physics, Vol.84 (2010) No.10, p.1321 [17] A.
Caruso: Advanced Materials, Vol.13 (2001) No.1, p. 11.

The material was used as electrode for photoelectrocatalytic degradation of hexachlorobenzen under irradiation of simulated sunlight.
Zhang, Z.Zheng and J.F.Luan: Journal of Hazardous Materials 2007 (142):431–436
[5] L.Han, Y.Xin and H.Liu: Journal of Hazardous Materials, 2010, 175(1/2/3): 524-531
[6] Y.Li, C.Xie and S.Peng: Journal of Molecular Catalysis A: Chemical, 2008, 282(1/2): 117–123
Zainal, C.Y.Lee and M.Z.Hussein: Journal of Photochemistry and Photobiology A: Chemistry, 2005, 172(3): 316-321.

Furthermore, composite materials can provide wider applications in repairing damaged and degraded materials suffering from corrosion and fatigue.
Figure 1 Modes of failure of bolted joints in composite materials Riveting can be considered as another form of bolting materials together and are suitable for laminates up to 3mm thick.
Chang, Journal of Composite Materials , vol. 30, pp. 1248-1313, 1996
Fiore, Journal of Composite Materials , vol. 41, no. 8, pp. 951-964, 2007
M. da Silva, “Adhesively Bonded Joints in Composite Materials: An Overview,” Journal of Materials Design and Applications, vol. 223, pp. 1-18, 2009

For the difficulties of machining small hole on difficult-to-cut materials, a study of hole-making technology by pulsed electrolyte jet machining is carried out.
As these components are all made from difficult-to-cut materials, conventional mechanical drilling techniques have become deficient to meet the new requirements.
Electro-stream drilling in ECM, however, doesn’t produce the residual stresses and cracks on the workpiece material, and no damage to the material structure.
Its characteristics are similar with electro-stream drilling, so it can be assumed that the material removal mechanisms of electrolyte jet machining and electro-stream drilling are basically the same: both are the outcomes of combined processing through special electrolysis, strong chemical corrosion, and other removal materials, under a condition of high-voltage (high potential gradient), high current density and high temperature of the injection point (a peculiar phenomenon is the glow discharge on the jet point) [10].
Acknowledgements The research presented in this paper is partially funded by the Natural Science Foundation of Jiangsu Province of China under Grant（No.BK2008394）, Aviation Foundation of China under Grant （No. 20080352008） and National Nature Science Foundation of China under Grant （No. 50675103）.

Materials and Methods Materials Chitosan powder used is a shrimp-based product with a degree of deacetylation of 87.4%, the solubility in acetic acid is 99.4%, and the molecular weight of 900 kDa.
Series: Materials Science and Engineering, 196 (2017) 012039
Ruckenstein, Supported chitosan-dye affinity membranes and their protein adsorption, Journal of Membrane Science 117 (1996) 271-278
Roy, Preparation of Chitosan from Shrimp Shell and Investigation of Its Properties, International Journal of Basic & Applied Sciences 11 (1) (2011) 77-80
Ismail, Antimicrobial and anticancer activities of silver nanoparticles synthesized from the root hair extract of Phoenix dactylifera, Materials Science and Engineering: C 89 (2018) 429-443

(1) 2 Experimental 2.1 Materials AF used in this study was produced in Korea, which belongs to poly(p-phenylene terephthalamide) fiber, usually abbreviated to PPTA.
Low concentration of NaOH solution, such as NaOH solution with density of 10%, was fit to modify AF. 5 Acknowledgment The authors gratefully acknowledge the helps from Carbon Fiber Technology Research Center School of Materials Science and Engineering of Shandong University. 6 References [1] P.J.de Lange, E.
Journal of Applied Polymer Science.
Journal of Applied Polymer Science.
Journal of Applied Polymer Science.

The granular ureas were used as the starting material for this work.
Mishra, Fluid bed technology: Overview and parameters for process selection, International Journal of Pharmaceutical Sciences and Drug Research, 2 (2010) 236-246
Bustam, Improvement of hydrophobicity of urea modified tapioca starch film with lignin for slow release fertilizer, Advanced materials sesearch, 626 (2013) 350-354
Workshop materials from 1st International Conference on Robust Quality Engineering, UTM, Kuala Lumpur, 22-23 April (267-272).
Tarng, Design optimization of cutting parameters for turning operations based on the taguchi method, Journal of Material Processing Technology, 84 (1998) 122-129.

(2) The constitutive relation of metal materials can not be gotten at high speed processing, so the constitutive relation at low speed processing is used in this model
Acknowledgement This research is supported by national nature science foundation of China (NSFC) project (No: 50975229) and science & technology project of Shaanxi province, China (No: 2009JQ7003）.
CIRP Journal of Manufacturing Science and Technology, Vol. 1(1) (2008), p. 2 [2] H.
Journal of Plasticity Engineering, Vol. 15(2) (2008), p. 6 (In Chinese) [3] F.K.
Journal of Xi'an University of Technology, Vol. 25(4) (2009), p. 383 (In Chinese)