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As a widely used technique for producing holes in hard-to-machine metals, electrochemical drilling process (ECD) is capable of boring any electrically conductive materials with relative high stock removal rates regardless of their mechanical properties, such as hardness, elasticity and brittleness [1,2,3,4].
Acknowledgements The authors gratefully acknowledge the financial support provided by the China Natural Science Foundation (50635040).
Harrison: International Journal of Electrical Machining, Vol. 8 (2003), pp. 1-14
Xu: Journal of Materials Processing Tech., Vol. 129 (2002), pp. 15-18
Mehrotra: Journal of Materials Processing Tech., Vol. 149 (2004), pp. 445-452

Experimental procedure and results Materials and methods.
The following raw materials were used in this study: SiC (~60 mm, 99% pure, Bronze Horse Abrasives Company, Beijing, China).
Journal of the European Ceramic Society, 2011, 31:825-831
Advanced Materials Research Vol. 873 (2014): 250-725
Rare Metal materials and engineering, 2009, 38:122-125.

Materials Science and Engineering: A 114 (1989): 51-59
Journal of materials science 24.7 (1989): 2449-2453
Materials Science and Engineering: A 160.2 (1993): 261-270
Materials Science and Engineering: A 508.1-2 (2009): 234-240
Materials Letters 189 (2017): 13-16.‏

Synthesis of an in situ aluminum matrix composite fabricated by Al-Cr2O3 system Heguo Zhu1,a, Hao Sun1,b, Bo Hua1,c, Guanhong Guo1,d, Jiewen Huang1,e, Jianliang Li1,f 1College of Materials Science and Engineering, Nanjing University of Science and Technology.
Experiments procedures Materials.
Pure Cr2O3 (10-30 μm) and Al powders (3-50 μm) were used as raw materials in fabricating Al-Al2O3 composites.
Materials Chemistry and Physics Vol. 137(2012), p. 532 [3] H.G.
Ma: Materials Science and Engineering R: Reports Vol. 29 (2000), p.49 [5] S.C.

Synthesis and Characterization of Chrom-free Dark Coating on AA6063 Aluminium Alloy with K2ZrF6 CHEN Tingyi1,2,a, FU Yeqi1, LU Wen1, LI Wenfang2 1Guizhou Normal University, School of materials and construction, Gui Zhou Gui Yang 550001, China; 2South China University of Technology, School of Material Science and Engineering, Guangzhou Guangdong 510640, China atingyi.chen@gznu.edu.cn Keywords: aluminum alloy 6063, coloring, zirconium porous film, chrome-free conversion, electrochemical detection Abstract.
Experiment The main materials and equipments in this experiment: K2ZrF6, film forming promoter, distilled water, 6063 aluminum alloy, constant temperature magnetic stirrer, electronic balance, VMP3 electrochemical workstation, multi-channel high resolution field emission scanning electron microscope, etc.
Applied Surface Science. 2008, 255(4): 1531-1533
Corrosion Science. 2009, 51(10): 2304-2315
Journal of functional materials[J], 2010(41), 260-263

Materials and Methods.
Because heavy metals and harmful material in sewage sludge can not enter the food chain, human beings can be safe.
Materials and Methods.
Because the heavy metals and harmful material in sludge do not enter the food chain, the harm to human beings can be avoided.
References [1] Wu Hao: Journal of Liaoning Economic Vocational Technological Institute. 2010, 2:72-73 [2] Zhang Xueying, Zhou Lixiang: Chinese Journal of Applied Ecology. 2002, 13(4):467-470 [3] Masafumi Tateda: Jmater Cycles Waste Manag. (2002)4:62-69 [4] Li Guoxue, Zhang Fusuo.

Evaluation Use of Calliandra calothyrsus Substituted Soybean Meal Supplement on Feed Nutrient Intake and Digestibility in the Kacang Goat Fajar Ajimukti Atmojoa, Bambang Suhartantob, Insani Hubi Zulfac, Kustantinah Kustantinahd* Department of Animal Feed Science, Faculty of Animal Science, Universitas Gadjah Mada, Jl.
The feed materials are Pennisetum purpureum cv.
Results and Discussion The nutrient content of each of the feed materials especially CP in SBM is the highest (Table 3).
Purbowati, Produksi karkas dan non karkas kambing kacang jantan yang diberi pakan dengan level protein dan energi berbeda, Animal Agriculture Journal 3 (2014) 17-23
Suhartati, Pengaruh penggunaan bungkil kedelai dan bungkil kelapa dalam ransum berbasis indeks sinkronisasi energi dan protein terhadap sintesis protein mikrobia rumen sapi perah, Journal of Livestock Science and Production 1 (2017) 1-12

Introduction Mesoporous materials are defined as materials that contain pores 2−50 nm in diameter.
Methodology Materials.
Porous Materials, John Wiley & Sons Ltd, United Kingdom, 2011, pp. 69-128
Asian International Conference on Materials, Minerals and Polymer, School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Penang, 2012, pp. 626-633
Zhang, An efficient method to synthesize carbonated nano hydroxyapatite assisted by poly(ethylene glycol), Materials Letters, (2012) 26-28

The cam and tappet made of hard and brittle materials, like white cast iron treated by quenching, would have fatigue damage on the area of maximum tensile stress (on the surface).
Journal of Vibration Engineering.
International Journal of Solids and Structures.
Hebei Journal of Industrial Science and Technology.Vol.30(2013),p.48-52 [7] J.P.
Journal of Machine Design.Vol.25(2008),p.34-36 [11] M.

This device will adjust the duty ratio of ultrasonic signal synchronously according to different signal of depth, while making the ultrasonic cleaning head work under the rated output power, so as to avoid the surface damage of building material and achieve the balanced cleaning effect.
Materials and methods Whole structure.
Acknowledeements We are grateful for the financial support by National Natural Science Foundation of China(Grant NO.11274092,11304026and NO.11274091)and Natural Science Foundation of Jiangsu Province (Grant NO.BK20130238),This work also is supported by the Changzhou Science and Technology Support Projects, Changzhou, China(Grant NO.CJ20130008,CE20120080)and the Open Project of Changzhou Key Laboratory of Sensor Networks and Environmental Sensing, Changzhou, China (Grant No. 
Journal of Fluid Mechanics. 365(1998)171–204.