International Journal of Materials Science and Applications

Volume 3, Issue 2, March 2014

  • Effects of Carrier Gas Flow-Rate and Oxygen Admixture Ratio on Particle Properties in Ar-O2 Plasma

    M. Rafiqul Alam, Feroza Begum, Quazi Delwar Hossain, M. Mofazzal Hossain

    Issue: Volume 3, Issue 2, March 2014
    Pages: 14-19
    Received: 25 December 2013
    Accepted:
    Published: 30 January 2014
    DOI: 10.11648/j.ijmsa.20140302.11
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    Abstract: Taking into account the strong plasma-particle interactions and particle loading effects, a plasma-particle interactive flow model for argon-oxygen plasma has been developed. We can predict the particle temperature, velocity, trajectory and plasma temperature isotherm by solving the model numerically during the in-flight thermal treatment of granul... Show More
  • Steady-State Electron Transport within InAlN Bulk Ternary Nitride, using the Monte Carlo Method

    Nadia Bachir, Abdelkader Hamdoune, Nasr Eddine Chabane Sari

    Issue: Volume 3, Issue 2, March 2014
    Pages: 20-24
    Received: 20 December 2013
    Accepted:
    Published: 20 February 2014
    DOI: 10.11648/j.ijmsa.20140302.12
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    Abstract: Al-bearing III-nitride semiconductor materials are essential for the development of high-frequency and high-power electronic devices and optoelectronic devices operating in the ultraviolet spectral region, because of their wide band gap and unique electronic characteristics. The InAlN alloy is attracting much attention, due to its lattice matching ... Show More
  • Preparation of PVA/Corn Starch Blend Films and Studying the Influence of Gamma Irradiation on Mechanical Properties

    Shafik S. Shafik, Kawakib J. Majeed, Mohanad I. Kamil

    Issue: Volume 3, Issue 2, March 2014
    Pages: 25-28
    Received: 27 December 2013
    Accepted:
    Published: 20 February 2014
    DOI: 10.11648/j.ijmsa.20140302.13
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    Abstract: In this paper, polyvinyl alcohol (PVA) /Corn Starch (CS) blend films were prepared using the solution casting method by changing the blending ratio of starch/PVA. The effects of gamma irradiation and soil burial on the biodegradability of the tested films were investigated by the mechanical properties (tensile strength and elongation to break %) an... Show More
  • Sputter Rate Distribution and Compositional Variations in Films Sputtered from Elemental and Multi-Element Targets at Different Pressures

    Erik Särhammar, Erik Strandberg, Nicolas Martin, Tomas Nyberg

    Issue: Volume 3, Issue 2, March 2014
    Pages: 29-36
    Received: 12 February 2014
    Accepted:
    Published: 28 February 2014
    DOI: 10.11648/j.ijmsa.20140302.14
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    Abstract: We report on the quantitative dependence of the deposition rate during magnetron sputtering as a function of the atomic mass, processing pressure and substrate location relative to the target. Targets made of four different materials (C, Al, Ti and Ta), ranging from very light to rather heavy atomic masses, were investigated theoretically initially... Show More
  • Isolation and Physicochemical Characterization of Tigernut (Cyperus esculentus) Starch as a Potential Industrial Biomaterial

    Adama Kenneth K., Afolayan Michael O., Oberafo Anthony A., Thomas Sunday

    Issue: Volume 3, Issue 2, March 2014
    Pages: 37-41
    Received: 11 February 2014
    Accepted:
    Published: 10 March 2014
    DOI: 10.11648/j.ijmsa.20140302.15
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    Abstract: Tigernut (Cyperus esculentus) seeds were examined for its starch composition and applicability as biomaterial in hybrid composite materials development. The physicochemical properties of the starch extracted were then compared with standard industrial maize starch. The starch was isolated using 1% w/v sodium metabisulphite solution and the obtained... Show More
  • Physico - Chemical and Mineralogical Characterization of a Moroccan Bentonite (Azzouzet) and Determination of its Nature and its Chemical Structure

    Azzeddine Er-ramly, Abdelali Ider

    Issue: Volume 3, Issue 2, March 2014
    Pages: 42-48
    Received: 17 January 2014
    Accepted:
    Published: 20 March 2014
    DOI: 10.11648/j.ijmsa.20140302.16
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    Abstract: This study concerns the results of Physicochemical and mineralogical characterization of a Moroccan bentonite (bentonite Azzouzet) and determination of its nature and its chemical structure. Several techniques were used; in particular X-ray diffraction (XRD), scanning electron microscopy coupled with EDX microanalysis (SEM-EDX), differential therma... Show More
  • Phase Transformations and Thermodynamics of Binary Systems Fe2О3 - V2O5 and Fe2О3 - MnO at High Temperatures

    Rossitza Paunova, Radost Alexandrova, Maksim Marinov

    Issue: Volume 3, Issue 2, March 2014
    Pages: 49-57
    Received: 13 February 2014
    Accepted:
    Published: 20 March 2014
    DOI: 10.11648/j.ijmsa.20140302.17
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    Abstract: The phase transformations and thermodynamics of the binary systems of Fe2O3-MnO2 as well as Fe2O3-V2O5 have been investigated. Pure oxides, waste vanadium catalyst (containing 4.12% V2O5) and manganese carbonate ore concentrate containing  44.56% MnO have been used for preparation of the mixtures. The purpose of these investigations was to study ... Show More
  • From Transient to Permanent Phenomena during GMAW of a Thin-Walled Marine Aluminium Alloy

    Stavros K. Chionopoulos, Dimitris I. Pantelis

    Issue: Volume 3, Issue 2, March 2014
    Pages: 58-69
    Received: 04 March 2014
    Accepted:
    Published: 30 March 2014
    DOI: 10.11648/j.ijmsa.20140302.18
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    Abstract: In this study, an experimental investigation of thin-walled GMA welded plates of AA5083-H116 has been carried out. The aim of this investigation is to study the effects of the GMAW process on the transient thermal and mechanical phenomena of the welded elements. Thick (4mm) plates of dimensions 700x300 mm2 were welded using a robotic arm. Measureme... Show More
  • The Success of the Backward Integration Policy in the Nigerian Cement Sector

    Elijah Ige Ohimain

    Issue: Volume 3, Issue 2, March 2014
    Pages: 70-78
    Received: 01 March 2014
    Accepted: 08 April 2014
    Published: 10 April 2014
    DOI: 10.11648/j.ijmsa.20140302.19
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    Abstract: The consumption of cement in Nigeria has increased to 18.5 million metric tonnes per annum (MMTPA) due to rapid urbanization and industrialization. Despite the huge demand for cement in Nigeria, domestic production was unable to meet the demand; hence the country relied on importation of cement to meet domestic construction needs. In 2002, the gove... Show More