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Machines, Mechanism and Robotics: Proceedings of Inacomm 2019

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Dr. Rajeev Kumar is currently Associate Professor in the School of Engineering, Indian Institute of Technology (IIT) Mandi, India. He received his Ph.D. in Machine Design from IIT Roorkee, India, in 2008. Prior to join IIT Mandi, he served at the General Electric John F. Welch Technology Centre, Ben

galuru, as a Technologist. His major research interests include smart material/structure, piezoelectric/triboelectric energy harvesting, finite element method, modelling, control, and optimization (genetic algorithm). He has published more than sixty research articles in international repute journals

and more than 40 conference proceedings. Dr. Kumar has successfully guided 5 Ph.D. scholars and 6 M.S. thesis. He has received project funding from SERB-DST, Aeronautical Research Board, Naval Research Board, BHEL Haridwar, Indo Farm Equipment Ltd., and Baddi, Society for Technology & Development,

Mandi. He has received National Doctoral Fellowship (NDF) Award - 2004 by AICTE, Green Belt Certificate Award-2009 by General Electric (GE), IIT Mandi Foundation Award-2013 for teaching many courses and setting up mechanical workshop, IIT Mandi Foundation Award-2016 for developing a new course ＂Desi

gn Practicum＂, and IIT Mandi Foundation Award-2019 for efficient management of the school activities as Chairperson of the School of Engineering and for playing key role in launching new academic programs. Dr. Vishal Singh Chauhan is an Associate Professor in the School of Engineering at Indian Inst

itute of Technology (IIT) Mandi, India. His research areas include deformation induced emissions for structural health monitoring, applications of ceramics and composites for deformation monitoring, thermal sensing and energy harvesting, glass ceramics for water treatment. Dr. Chauhan has published

55 papers in international journals, has received 4 externally funded projects, and has supervised 4 Ph.D. and 6 M.S. students. He has given invited talks in several workshops and conferences, and teaches courses related to Graphics for Design, Mechanics of Rigid Bodies, Theory of Machines, Design o

f Machines Elements, Deformation Behaviour of Materials. Dr. Mohammad Talha is currently an Associate Professor in the School of Engineering, Indian Institute of Technology (IIT) Mandi, India. He received his Ph.D. in Aerospace Engineering from IIT, Kharagpur in 2012, and undergraduate and postgradu

ate degrees in Mechanical Engineering from Aligarh Muslim University, India. Dr. Talha has received the prestigious National doctoral fellowship from the Government of India for his doctoral degree. He has a passion for research in engineering and applied sciences, which includes computational solid

mechanics, mechanics and composites structures, uncertainty quantification in aircraft analysis and design, imperfection sensitivity in composites, experimental and computational biomechanics. Dr. Talha has received project funding from SERB-DST, AR&DB, TBRL, DRDO and SEED grant from IIT Mandi. He

has published more than 45 research articles in international journals, and more than 30 conference proceedings in India and abroad. Dr. Talha has successfully guided two Ph.D. scholars and 2 M.S. thesis at IIT Mandi. Dr. Himanshu Pathak is currently an Assistant Professor at Indian Institute of Tec

hnology (IIT) Mandi, India. Dr. Pathak has expertise on mesh independent computational methodology (like XFEM and meshfree methods), multi-scale modelling, solid mechanics, fracture and fatigue analyses of composite materials, etc. He has published more than 50 research articles in journals and conf

erence proceedings of national and international repute. He has supervised 4 Ph.D. and 3 M.S. students. Dr. Pathak has given invited talks at several international workshops, conferences, colloquiums, etc., and teaches courses related to mechanical design and robotics.

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Wet process synthesis of Al-doped and Ga-doped ZnO nanoparticles

為了解決glass ar的問題，作者SURIYANTO 這樣論述：

In this study, ZnO nanoparticles doped by Al and Ga were prepared by a wet process. Then the performance of Al doped ZnO composite would be evaluated and analyzed The main purpose of this study was to investigate The effects of Al morphological properties of ZnO:Al and ZnO:Ga nanopowders. Objective

s of this study are as following: analyzing of structural and dimensional of particles properties of ZnO:Al and ZnO:Ga prepared by the wet process. Crystallites (grain) size from XRD data using Scherrer equation AZO at 2 %, 3 %, 4 %, and 5 % (50 nm, 19 nm, 18 nm, and 4 nm) and GZO at 2 %, 3 %, 4%, a

nd 5 % (59 nm, 37 nm, 20 nm, and 6 nm). The crystallite size of AZO particles decreased with increasing Al and Ga concentration. Morphological properties were characterized by scanning electron microscope (SEM). When the Al doping and Ga concentration increases from 2% to 5%, their nanostructures ha

ve sharper lines. The effect of Al doping on the optical properties of ZnO thin films was investigated describing the optical transmittance and optical reflectance spectra of Al-doped ZnO sample this range. 3.46 (Al 2 %), 3.67 (3 %), 3.68 (4 %), and 3.73 (5 %); and 3.53 (Ga 2 %), 3.55 (3 %), 3.58 (4

%), and 3.61 (5 %). The absorption spectra shifted towards the lower wavelength as the doping concentration increased. FTIR spectra suggested the formation of the wurtzite in both of the ZnO and the ZnO:Al. The presence of Al in ZnO lattice was confirmed by the peaks around 578, 688, and 1171 cm-1.

Electrochemical properties were measured by cyclic voltammetry, and ZnO, ZnO:Al, and ZnO:Ga with doping concentration of 2 %, 3 %, 4 %, and 5 % showed pseudocapacitive nature, and the electrical current density increased as the doping concentration increased, which suggests the doping increased the

electric conductivity of the materials.

A Synopsis of the Exhibit of the Tiffany Glass and Decorating Company in the American Section of the Manufactures and Liberal Ar

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石墨抗氧化塗層的製備與其性質

為了解決glass ar的問題，作者賴奕翔 這樣論述：

本研究採用矽蒸鍍法和漿料含浸法在石墨表面製備SiC層。研究了反應層/塗層的相變化、微觀結構和抗氧化性能。使用矽蒸鍍法，在1500℃/1小時處理後，石墨表面沒有觀察到SiC層，而1500℃/4小時和1500℃/9小時處理的樣品分別有大約100μm和125μm的SiC層。反應SiC層的表面粗糙度隨著熱處理時間的增加而增加。在空氣中1000℃的抗氧化試驗中，石墨在2小時內完全氧化。通過矽蒸鍍製備的石墨具有125μm SiC層的樣品，在氧化試驗中2小時後保留了17%的石墨。在漿料含浸法中，漿料由酚醛樹脂、酒精、Si粉和SiC粉製備。含浸的試片在1500℃的氬氣中處理2小時，塗層反應成SiC，不同比例

的漿料所製作出的塗層厚度以及塗層型態都不一樣。然而，塗層中存在明顯的裂紋。為了減少裂痕的數量以及提高塗層的厚度，用不同比例的漿料組合成雙層塗層，結果顯示能有效的減少表面塗層的孔洞以及裂痕數量，也能使塗層厚度變厚。在空氣中1000℃氧化試驗中，抗氧化能力最好的單層塗層，在10h後只剩下10％的石墨，但抗氧化能力最好的雙層塗層，在10h後還剩下92％的石墨，提升效果相當顯著。