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Sodium-doped Hydroxyapatite Nanopowder through Sol-gel Method: Synthesis and Characterization Erlani Pusparini1, 3a, Iis Sopyan2b, Mohd.Hamdi1c, Ramesh Singh1d 1Department of Engineering Design & Manufacture, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia 2Department of Manufacturing and Materials Engineering, Faculty of Engineering, International Islamic University Malaysia, PO Box 10, 50728 Kuala Lumpur, Malaysia 3Ministry of Research and Technology, Republic of Indonesia Jalan M.H.
Nanocrystalline calcium phosphate ceramics in biomedical engineering.
Materials Science and Engineering C, 27. 441–449 [2] Fathi M.H., Hanifi A., Mortazavi V. 2008.
Materials Science and Engineering C, 27. 837–848 [4] Suchanek, W., Yashima, M., Kakihana, M., and Yoshimura, M. 1997.
Hydroxyapatite ceramics with selected sintering additives.

Lin, Fabrication of high thermal conductive diamond/copper composites and their joining with substrates, Journal of Material Sciences & Engineering. 7(2018)80
Böhm, Modeling of The Thermal Conductivity and Thermomechanical Behavior of Diamond Reinforced Composites, International Journal of Engineering Science. 46(2008) 606-619
Qu, Progress in Diamond Composites for Thermal Management Materials, Superhard material engineering. 22(2010) 1673-1433
Powder Metallurgy and Metal Ceramics. 31(1992) 687-692
Ma, Thermal Conductivity of Cu/Diamond Composites Prepared by a New Pretreatment of Diamond Powder, Composites Part B: Engineering. 52(2013) 182-186.

Fernandéz-Vidal et al., Analysis of the effects of tool wear on dry helical milling of Ti6Al4V alloy, Procedia Engineering. 132 (2015) 593 – 599
Dargush, Characteristics of cutting forces and chip formation in machining of titanium alloys, International Journal of Machine Tools & Manufacture. 49 (2009) 561–568
Almeida et al., Machining hardmetal with CVD diamond direct coated ceramic tools: effect of tool edge geometry, Diamond & Related Materials. 14 (2005) 651–656
Karpuschewski et al., Measuring procedures of cutting edge preparation when hard turning with coated ceramics tool inserts, Measurement. 55 (2014) 627–640
Jeong, New cooling approach and tool life improvement in cryogenic machining of titanium alloy Ti-6Al-4V, International Journal of Machine Tools & Manufacture. 41 (2001) 2245–2260

Acknowledgement The authors appreciate gracefully the financial support of Covenant University and Surface Engineering Research Laboratory, Department of Mechanical Engineering, Covenant University for equipment usage References [1] P.A.L., Anawe, O.S.I.
[2] M.F.Ashby, Engineering Materials 1: An introduction to properties, applications and design.
Journal of Engineering Science and Technology, 7(4), (2012) 517–518
International Journal of Scientific and Engineering Research, 8(4), (2013) 12-18
International J of Electrochem Sci, 9(4), (2014) 1942–1963

Also, the use of high-tech materials allows us to provide the required level of quality of engineering products.
Collection of scientific papers “High technologies at engineering” Kharkov Polytechnic Institute.
Progressive engineering technologists and Moscow.
Scientific and technical journal "Fundamental and applied problems of engineering and technology" of the State University - educational, scientific and industrial complex (FSBEI HPE "State University - UNPK") .
Nechaev, Myo Naing Oo.// Applied Mechanics and Materials Vols. 548–549. 2014 The 3rd International Conference on Manufacturing Engineering and Process (ICMEP 2014).

Mechanical Properties of Duplex Treated Steels Obtained by Instrumented Indentation NISTOR Ana Maria1,a, BECHERU Andrei1,b, FOLTUT Daniel1,c, BUZDUGAN Ramona Monica2,d, BUZDUGAN Dragos1,e* and RADU Bogdan1,f 1University Politehnica Timisoara, P-ta Victoriei no. 2, Timisoara, Romania, Department of Materials Engineering and Fabrication 2Continental Powertrain Engineering Romania aanamaria.nistor@student.upt.ro, bandrei.becheru@student.upt.ro, adaniel.foltut@student.upt.ro brmdobra@gmail.com, cdragos.buzdugan@upt.ro, dbogdan.radu@upt.ro Keywords: Duplex treatments, nitriding, work hardening, bulk modulus, hardness.
Sun, Realising the potential of duplex surface engineering, Tribology International (1998) 127-137
Matthews, Coatings Tribolgy Properties, Mechanisms, Techniques and Applications in Surface Engineering, Tribology and Interface Engineering Series 56, (2009) [4] O.H.
Phar, Measurement of hardness and elastic modulus by instrumented indentation: Advances in understanding and refinements to methodology, Journal of Materials Research (2003) [7] D.
Tricoteaux, Mechanical Properties of Ceramics by Indentation: Principle and Applications, Ceramic Materials (2010).

SiMac School of Mechanical Engineering of Shandong University of Technology,Zibo, Shandong,China asdutlili@163.com,bhourongguo@sdut.edu.cn,csmzw0827@163.com Keywords: Electrical discharge machining, nickel-based alloy Abstract.
[3] Durul Ulutan, Tugrul Ozel, 2011, “Machining induced surface integrity in titanium and nickel alloys: A review”, International journal of machine tool and manufacture, 51, 250-280
[4] H.T.Lee, T.Y.Tai, 2003, “Relationship between EDM parameters and surface crack formation”, Journal of materials processing Technology, 142, 676-683
Luis, 2003, “A study on the machining parameters optimisation of electrical discharge machining”, Journal of Materials Processing Technology, 143-144, 521-526
Bleys, 2004, “Investigation of material removal mechanisms in EDM of composite ceramic material”, Journal of Materials Processing Technology, 149(1-3), 347-352

Study on Effect of Stirring Parameters on Tensile Properties of Coconut Shell Powder Reinforced Epoxy Matrix Composite Mohan Kumar1,a*, Rithin K2,b, Raghuveer3,c, Sharun3,d, Yathiraj3,e, Shanmukh3,f, Shreeprakash B1,g 1Faculty of Mechanical Engineering, Srinivas School of Engineering, Mangalore, India 2Faculty of Physics Department, Srinivas School of Engineering, Mangalore, India 3Undergraduates of Mechanical Engineering, Srinivas School of Engineering, Mangalore, India ahaimohanji@gmail.com,brithin4u@rediffmail.com,craghvbhat18@gmail.com, dkotiansharun@gmail.com,eyathir13@gmail.com,fshanmukh10@yahoo.com, gprincipal@srinivasgroup.com Keywords: Coconut shell powder, epoxy, Ultimate tensile strength (UTS), hardener Abstract This paper deals with the preparation of coconut shell powder reinforced polymer matrix composite.
Recently Polymer composite materials have generated wide interest in various engineering fields, particularly in aerospace applications.
International Journal of Materials Science and Applications.
Journal of Minerals and Materials Characterization and Engineering (2012), 11, 774-779
The Arabian Journal for Science and Engineering, Volume 28 (2003), Number 2B, 171-181

Introduction Unmanned excavator has been gradually applied in the constructional engineering, such as foundation of the airport, railway, highway, metro, and many other projects, which can remarkably improve the operation efficiency and decrease the economic cost [1-3], since the unmanned machines can work continuously and it is able to operate in the conditions which are unfit for the worker.
Deterministic surfacing method Deterministic surfacing method is generated from the machining technology for optical components and ceramics products [7-10], which is normally named computer controlled optics surfacing (CCOS) [11-13].
References [1] YH Zweiri, LD Seneviratne, and K Althoefer: Proceedings of the Institution of Mechanical Engineers Vol. 217 (2003), p. 259-274 [2] YH Zweiri: International Journal of Automation and Computing: Vol. 5 (2008), p. 185-192 [3] TA Tamba, B Hong, and KS Hong: International Journal of Control, Automation and Systems Vol. 7 (2009), p. 113-122 [4] S.
Golini: Journal of Intelligent Material Systems and Structures Vol. 10 (1999), p. 683-689 [10] W Kordonski, and D Golini: Int.
B Vol. 13 (1999), p. 2205-2212 [11] RA Jones: Applied optics Vol. 34 (1995), p. 1162-1169 [12] DW Kim, SW Kim, and JH Burge: Optics Express Vol. 17 (1999), p. 21850-21866 [13] R Aspden, R McDonough, and FR Nitchie Jr: Vol. 11 (1972), p. 2739-2747 [14] XM Shen, M Nagano, WQ Peng, YF Dai, and K Yamamura: Key Engineering Materials Vol. 523-524 (2012), p. 276-280 [15] XM Shen, YF Dai, WQ Peng, M Nagano, and K Yamamura: Key Engineering Materials Vol. 516 (2012), p. 504-509

Effects of Firing Temperature and Time on the Luminescency of Phosphors in Strontium Aluminate System Co-doped by Eu2O3 and Dy2O3 and Prepared by Solid State Reaction Processing Selvin Yesilay Kaya1, Bekir Karasu2, Guray Kaya3, Erkul Karacaoglu2 1Anadolu University, Faculty of Fine Arts, Department of Glass, Eskisehir, Turkiye 2Anadolu University, Faculty of Engineering and Architecture, Department of Materials Science and Engineering, Eskisehir, Turkiye 3Dumlupinar University, Faculty of Engineering, Department of Ceramic Engineering, Kutahya, Turkiye Email: 1syesilay@anadolu.edu.tr, 2bkarasu@anadolu.edu.tr, 3gurayk@anadolu.edu.tr Keywords: Photoluminescence, Phosphor, Rare earth, Long afterglow, Firing time and temperature, Characterization.
References [1] W., Haoyi, H., Yihua and W., Yinhai, Journal of Luminescence, Volume 130, Issue 1, Pages 127-130, 2009
I., Hsiang and L., Ming-Tsai, Ceramics International, 35 1027-1032, 2009