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Materials and Methods Coating Procedure.
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Sol-Gel-Science.

Preface This issue collected some engineering, tribology and materials research papers from the International Conference on Engineering Tribology and Applied Technology 2018 (ICETAT 2018).
At the same time, the conference represented a unique opportunity for the tribology and engineering community to present their new research results, exchange ideas and become familiar with new trends and directions in the fields of Basic Friction and Wear, Biotribology, Contact Mechanics, Green Tribology and Sustainability, Lubricants and Lubrication, Material Analysis and Examination, Manufacturing Technology, Micro and Nano Tribology, Surface Engineering and Coating, Tribology in Machine Elements, etc.
The papers presented in Journal of Key Engineering Materials were the selected manuscripts associated engineering tribology and materials research areas from ICETAT2018.
Sponsors Ministry of Science and Technology (MOST) Taiwan Society of Tribology Technology (TSTT) National Formosa University (NFU)

High Speed Steel (HSS) is selected as SPIF tool material because its high stiffness and high strength.
References [1] Fan, G., Gao, L., Hussain, G., Zhaoli, Wu, “Electric hot incremental forming: a novel technique” International Journal of Machine Tools and Manufacture, 48 (15), p. 1688-1692, 2008
Arruebarrena, “Warm incremental forming of magnesium alloys using hot fluid as heating media” Key Engineering Materials Vols. 504-506, 2012
[4] J.J.Park Y.H.Ji, "Formability of magnesium AZ31 sheet in the incremental forming at warm temperature" Journal of Materials Processing Technology, vol. 210, no. 354–358, pp. 354-358, 2008
[5] Anderson Daleffe, Lirio Schaeffer , Daniel Fritzen and Jovani Castelan, “Analysis of the Incremental Forming of Titanium F67 Grade 2 Sheet”, Key Engineering Materials Vols. 554-557 (2013) pp 195-203 [6] LE Khanh Dien, NGUYEN Thanh Nam, VO Van Cuong, LE Van Sy “A calculation for compensating the errors due to springback when forming metal sheet by single point incremental forming (SPIF)”, Magazine Development of Science and Technology, VNU, no K4, 2010. book 13, pages 14 – 24.

According to Rabinowicz theory [3], because of the materials with small elastic modulus E can store elastic deformation energy, and the materials with high hardness H and small elastic strain limit usually display excellent friction properties in wear.
In order to improve the interface strength between DLC film and substrates, it has been considered to use intermediate materials.
The results obtained are as follows: 1) When DLC film is directly deposited on surface of metal materials at room temperature, cracking is formed and local shedding is also generated on surface of film.
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[5] Cong Wang* and Nam-Young Kim , Fabrication of Metal-insulator-metal Capacitors with SiNx Thin Films Deposited by Plasma-enhanced Chemical Vapor Deposition Transactions On Electrical And Electronic Materials Vol. 10, No. 5, October 25, 2009 [6] J.
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Among the magnetic materials, NiZn ferrite is a soft magnetic material with good magnetic properties [1].
The occurrence of the interaction will change the magnetic properties of the materials significantly.
A mixing rule for predicting frequency dependence of material parameters in magnetic composites, Journal of Magnetism and Magnetic Materials. 324(2012)1063-1066 [8] Mattei JL, Le Floc'h M.
Percolative behaviour and demagnetizing effects in disordered heterostructures, Journal of Magnetism and Magnetic Materials. 257 (2003) 335-345 [9] Ahmad K, Pan W, Shi SL.
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Polymers and nanotechnology have increased tremendous applications for obtaining these desirable materials.
Nanocomposites are one of such materials.
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The program and optimal design of planetary gear based on differential evolution algorithm Wang Zhan-kui 1, a, Zheng Yan-ling 1,b 1 Henan institute of science and technology，China aluckywzk@126.com, b zhengyanling000@sina.com, Keywords: Planetary gear, Optimal design, Differential evolution algorithm.
The working life of the transmission system is 10 years, the material of center and planetary gears are 20CrNiMoA, the manufacturing precision of gears is 7 levels, and the transmission can be working uniform steadily.
References [1] Wang An-Lin,Jiang Tao, Multi-objective optimization in reliability design for large-scale planetary gear transmission system, Chinese Journal of Construction Machinery,Vol. 7(2009),p.253-257 [2] Du Ai-Min,Song Jun-jie,Lou guang, Optimization and application of planetary gear set for hybrid Electric Vehicle, Journal of Tong ji University in chinese ,Vol. 38(2010),p.103-107 [3] Xv Fang, Zhou Zhi-Gang, Virtual assembly design of closed planetary transmission Systems, Coal Mine Machinery in chinese, Vol.31(2010),p.174-176
Differential evolution –a simple and efficient heuristic for global optimization over continuous spaces .Journal of Global Optimization, Vol.11(1997),p.341 - 359
[5] Rao Da-Lin, Cai Guo-Biao, Modified Differential Evolutionary Algorithm for Fast Simulation Optimization and Its Application, Journal of Astronautics,Vol.3(2010),p.793-797 [6] Zhou de-xuan, Gao li-qun, Wu jian-hua, Application of HDEHS Algorithm to Structural Engineering, Journal of Northeastern University in chinese,Vol.31(2010),p.769-772 [7] Zhang xue-yi, Optimization design for planetary gear reducer, Journal of Shandong Institute of Technology in chinese,Vol.10(2000),p.18-25

Experimental Materials and Apparatus.
Anhydrous ethanol (w≥99.5%) was supplied by Sichuan Hangjia biological medicine science and technology co., LTD.
Acknowledgments This work was supported by the National Natural Science Foundation of China (No. 81102344), Natural Science Project of the Education Department of Sichuan Province, China (12ZA081), and the applied research and development funds of the Bureau of Science and Technology of the Mianyang City, China (No.10Y003-8).
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