International Journal of Materials Science and Applications

Volume 3, Issue 5, September 2014

  • Influence of Surface Passivation on Optical Properties of Spray Pyrolysis Deposited Pd-F:SnO2

    Patrick Mwinzi Mwathe, Robinson Musembi, Mathew Munji, Benjamin Odari, Lawrence Munguti, Alex Alfred Ntilakigwa, John Nguu, Bernard Aduda, Boniface Muthoka

    Issue: Volume 3, Issue 5, September 2014
    Pages: 137-142
    Received: 07 August 2014
    Accepted: 26 August 2014
    Published: 10 September 2014
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    Abstract: Pd-F:SnO2 thin films have been prepared by spray pyrolysis technique using an alcoholic precursor solution consisting of stannic chloride (SnCl4.5H20), ammonium fluoride (NH4F) and palladium chloride (PdCl2). Optimization on the deposition parameters has been done in order to obtain high quality thin films. The effect of varying the fluorine conten... Show More
  • Influence of Firing Temperature on Physical Properties of Same Clay and Pugu Kaolin for Ceramic Tiles Application

    Hashimu Hamisi, Seungyong Eugene Park, Byung-Hyun Choi, Yong-Taie An, Lee Jeongin

    Issue: Volume 3, Issue 5, September 2014
    Pages: 143-146
    Received: 13 August 2014
    Accepted: 26 August 2014
    Published: 10 September 2014
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    Abstract: This study focuses on the effect of firing temperature on the physical properties of Same clay and Pugu kaolin for potential application in ceramic tiles. X-Ray diffractometer (XRD) is used to analyze the phases formed after firing. XRD result shows that quartz, sillimanite and cristobalite appears at temperature beyond 1200oC while mullite phase d... Show More
  • Preparation and Structural Characterization of Sol-Gel-Derived Silver Silica Nanocomposite Powders

    Duy Phong Pham, Kim Khanh Huynh, Cao Vinh Tran, Van Quang Vu, Thi Thanh Van Tran

    Issue: Volume 3, Issue 5, September 2014
    Pages: 147-151
    Received: 30 May 2014
    Accepted: 23 August 2014
    Published: 10 September 2014
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    Abstract: The silver embedded silica powders (Ag/SiO2) have been successfully prepared by sol-gel method. Ag nanoparticles were formed from the thermal decomposition of the silver nitrate. X-ray diffraction shows that the silver nanocrystals have appeared after a heat-treatment at 600 °C. TEM images show that the spherical silver particles with an average si... Show More
  • Characterization of Al2O3/Al/Al2O3 Joints with Ti+Cr Interlayer

    Marzanna, Maria Ksiazek, Maria, Wieslawa Richert, Lukasz, Rafal Boron, Adam Tchorz

    Issue: Volume 3, Issue 5, September 2014
    Pages: 152-158
    Received: 20 August 2014
    Accepted: 28 August 2014
    Published: 10 September 2014
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    Abstract: Joints of Al2O3/Al/Al2O3 are formed by liquid – state bonding of alumina substrates covered with thin Ti+Cr film of 380 nm thickness using an Al interlayer of 30 µm at 973 K under a vacuum of 0.2 mPa applied for 5 minutes and at a pressure of 0.01 MPa. The bond strength of the joints is examined by a four – point bend testing at room temperature, c... Show More
  • Preparation of Activated Carbon from Oil Palm Empty Fruit Bunch (EFB) by Steam Activation Using Response Surface Methodology

    Sharifah Aishah Syed A. Kadir, Sharmeela Matali, Nor Fadilah Mohamad, Noor Hidayu Abdul Rani

    Issue: Volume 3, Issue 5, September 2014
    Pages: 159-163
    Received: 04 August 2014
    Accepted: 21 August 2014
    Published: 20 September 2014
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    Abstract: This paper aims to find the optimum conditions for preparation of activated carbon from empty fruit bunch (EFB) using physical steam activation by applying response surface methodology (RSM) with maximizing the BET surface area. The main process variables for this study were activation temperature and activation time and quadratic model was develop... Show More
  • Recycling of Scrap Tyres

    Sudha Rani, Rajesh Agnihotri

    Issue: Volume 3, Issue 5, September 2014
    Pages: 164-167
    Received: 30 July 2014
    Accepted: 18 August 2014
    Published: 20 September 2014
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    Abstract: Environmental distress harms concerning the possibility of using tyre rubber waste as raw materials for the research of liquid This research explain the use of tyre pyrolysis oils by solving the difficulty of waste tyre removal. In this study pyrolysis of scrap tyres was approved in controlled environment in Rotary bed horizontal batch reactor of 1... Show More
  • Thermo-Mechanical Chain Branching of Commercial High Density Polyethylene during Extrusion

    Yadollah Teymouri, Saeed Houshmandmoayed, Mohammad Adibfar, Reza Rashedi

    Issue: Volume 3, Issue 5, September 2014
    Pages: 168-176
    Received: 17 August 2014
    Accepted: 25 August 2014
    Published: 20 September 2014
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    Abstract: Two different phenomena may affect average molecular weight (Mw) of molten polyethylene during extrusion process. The first is crosslinking, which can be divided to two categories of chain branching and network formation, leading to an increase in Mw. The second is chain scission which leads to a decrease in the average Mw. In this work, chain bran... Show More
  • High Temperature Diffusion in AlxGa1-xN and P-Type AlGaN by Al4C3

    Dohyung Kim, Heesub Lee, Yoshiki Naoi, Shiro Sakai

    Issue: Volume 3, Issue 5, September 2014
    Pages: 177-182
    Received: 17 August 2014
    Accepted: 06 September 2014
    Published: 20 September 2014
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    Abstract: The diffusion experiment of AlxGa1-xN (x = 0.00, 0.04, 0.45, 0.65, 0.86, 1.00) samples using a solid source of Al4C3 layer was performed by low-pressure metalorganic vapor phase epitaxy (LP-MOVPE). The AlxGa1-xN (x≦0.45) samples were proven to be a p-type. In second ion mass spectroscopy (SIMS) analysis, the carbon profile is different from the sim... Show More
  • A Study of Effects of Machining Parameters on Tool Life

    Sunday Joshua Ojolo, Olugbenga Ogunkomaiya

    Issue: Volume 3, Issue 5, September 2014
    Pages: 183-199
    Received: 21 August 2014
    Accepted: 04 September 2014
    Published: 20 September 2014
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    Abstract: This work involves the investigation carried out to study the effects of machining parameters on tool life under dry machining environment. Three cutting tool materials (HSS blank tool - M2 C66, tungsten carbide insert tool grade P-10, DMNG carbide insert tool 150412-SA) and work materials (medium carbon steel 0.4 wt% C, mild steel 0.29 wt% C, bras... Show More
  • Transient Response in Aqueous Solution of an Anions Porous Silicon Based Sensor

    Arturo Ramirez-Porras, Natalia Murillo-Quiros

    Issue: Volume 3, Issue 5, September 2014
    Pages: 200-204
    Received: 22 August 2014
    Accepted: 12 September 2014
    Published: 30 September 2014
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    Abstract: A porous silicon based sensor has been developed to detect anions in a salt solution by the application of DC pulses on a Semiconductor/Electrolyte system. The sensor performance can be explained invoking a model where charge accumulation in the semiconductor surface states directly affects their geometric capacitances. By varying anions concentrat... Show More
  • The Electro-Optical Characteristics of the AZO/Mo/AZO Transparent Conductive Film on PC Substrate

    Tien-Chai Lin, Wen-Chang Huang, Fu-Chun Tsai

    Issue: Volume 3, Issue 5, September 2014
    Pages: 205-209
    Received: 29 August 2014
    Accepted: 15 September 2014
    Published: 30 September 2014
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    Abstract: The triple-layered transparent conductive oxide thin films, AZO/Mo/AZO (OMO) structure, is present in the paper. The OMO film is deposited on polycarbonate (PC) substrates by a co-sputtering process at room temperature. Metal Mo is chosen because of its chemical stable and low resistivity. The OMO film shows a great reduction of resistivity through... Show More
  • Engineering Design and Manufacturing Infrastructure Availability and Supply in Ghana

    Akpakpavi Michael

    Issue: Volume 3, Issue 5, September 2014
    Pages: 210-216
    Received: 25 August 2014
    Accepted: 09 September 2014
    Published: 30 September 2014
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    Abstract: The purpose of this paper is to assess the availability and supply of mechanical engineering design and manufacturing infrastructure in Ghana. In the study, the availability of engineering inputs were investigated using a questionnaire administered on suppliers/dealers in engineering inputs, local engineering materials producers as well as machiner... Show More
  • A Reproduction of the Ancient Bandjeli’s Steel-Making Process

    Pali Kpelou, Gnande Djeteli, Ayi Djifa Hounsi, Hans Peter Hahn, Tiburce Ahouangbe Aboki, Kossi Napo

    Issue: Volume 3, Issue 5, September 2014
    Pages: 217-225
    Received: 04 September 2014
    Accepted: 23 September 2014
    Published: 30 September 2014
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    Abstract: This paper presents an ancient traditional steel-making process of Bandjeli, in the Bassar Region in the Republic of Togo (West Africa). The iron specialists of Bandjeli have owned technical knowledge to cast direct reduced iron (DRI) likely direct reduced steel (DRS). This know-how was transferred to each generation over many centuries. The descri... Show More
  • Thermal Stability of Foils Made of Graphene-Oxide and Graphene-Oxide with Fullerene and their Composites with Methylcarboxy Cellulose and with Beta 1,3/1,6 – D - Glucan

    Klouda Karel, Zemanova Eva, Friedrichova Romana, Bradka Stanislav, Gembalova Lucie

    Issue: Volume 3, Issue 5, September 2014
    Pages: 226-245
    Received: 29 August 2014
    Accepted: 16 September 2014
    Published: 30 September 2014
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    Abstract: This contribution contains data on thermal stability of certain materials whose initial precursor is graphite. Graphite was oxidized separately and in a mixture with fullerene C60. The prepared oxides were processed with vacuum filtration to produce foils and their morphology and thermal stability was described. The graphene oxides reacted with nan... Show More
  • Crack Initiation and Fatigue Behaviour Evaluation of Ceramic Film Deposited on Ti-6Al-4V Alloy

    Md. Shamimur Rahman, Md. Abdullah Al Mahmood

    Issue: Volume 3, Issue 5, September 2014
    Pages: 246-249
    Received: 08 August 2014
    Accepted: 29 August 2014
    Published: 30 September 2014
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    Abstract: Titanium alloy offers several material properties including strength-to-weight ratio and good fatigue properties. Wear resistance of Titanium alloy is comparatively lower. To improve its wear resistant properties surface treatment must be considered. Hard thin film deposited by PVD technique is well-known to improve the wear resistance. In this stu... Show More
  • Effect of Substrate Bias Voltage on Fretting Fatigue Behaviour of CrN Film Deposited on Ti-6Al-4V Alloy

    Md. Shamimur Rahman, Md. Abdullah Al Mahmood

    Issue: Volume 3, Issue 5, September 2014
    Pages: 250-253
    Received: 08 August 2014
    Accepted: 20 August 2014
    Published: 30 September 2014
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    Abstract: A fracture behavior of PVD coated ceramic film deposited on Ti-6Al-4V specimens was evaluated for a fretting fatigue geometry in which specimens were contacted on both sides with pads of the similar material. Behavior against the ceramic film coated specimens was characterized through the determination of fretting fatigue strength up to 107 cycles.... Show More
  • Effect of Reflow Profile Parameters on Surface Mount Chip Resistor Solder Joint Shear Strength

    Peter K. Bernasko, Sabuj Mallik, G. Takyi

    Issue: Volume 3, Issue 5, September 2014
    Pages: 254-259
    Received: 10 August 2014
    Accepted: 30 August 2014
    Published: 30 September 2014
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    Abstract: The focus of this study is on the effect of reflow parameters on the joint shear strength. Eight reflow profiles were developed using four factors at two levels of Taguchi design of experiment for 1206, 0805 and 0603 chip resistors. Normal probability and main effect plots were used to provide a complete profile of the effect of reflow parameters o... Show More
  • Mechanical Properties of Zirconia-Titanium Composites

    Hideaki Tsukamoto

    Issue: Volume 3, Issue 5, September 2014
    Pages: 260-267
    Received: 19 September 2014
    Accepted: 25 September 2014
    Published: 30 September 2014
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    Abstract: This study aims to investigate mechanical properties of ZrO2-Ti composites. The samples have been fabricated by spark plasma sintering (SPS). The experimental results demonstrate that a small amount of ZrO2 can enhance Ti matrix in hardness and tensile strength, while a large amount of ZrO2 degrade the tensile strength and ductility because of high... Show More
  • Electronic and Magnetic Properties of Graphene Möbius Strips: Density Functional Theory Approach

    Hossein Mazidabadi, Hamidreza Simchi, Mahdi Esmaeilzadeh

    Issue: Volume 3, Issue 5, September 2014
    Pages: 268-273
    Received: 26 July 2014
    Accepted: 12 August 2014
    Published: 30 September 2014
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    Abstract: Electronic and magnetic properties of graphene Möbius strips with different widths are studied using density functional theory. It is shown that the multiplicity of the Möbius strip, the cohesive energy, and the band gap energy increase with increasing the width of Möbius strip. We show that the magnetic moment of Möbius strip decreases with increa... Show More
  • A Theoretical Study of the Heavy and Light Hole Properties of Cd1-xZnxS Quantum Dot Superlattices

    Saber Marzougui, Nabil Safta

    Issue: Volume 3, Issue 5, September 2014
    Pages: 274-278
    Received: 27 August 2014
    Accepted: 11 September 2014
    Published: 30 September 2014
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    Abstract: This work reports on a theoretical investigation of superlattices based on Cd1-xZnxS quantum dots embedded in an insulating material. This system, considered as a series of flattened cylindrical quantum dots with a finite barrier at the boundary, is studied using the tight binding approximation. The ground miniband width and the longitudinal effect... Show More