Forthcoming articles

International Journal of Microstructure and Materials Properties

International Journal of Microstructure and Materials Properties (IJMMP)

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International Journal of Microstructure and Materials Properties (7 papers in press)

Regular Issues

  • Wear and hardness evaluation of electrodeposited Ni-SiC nanocomposite coated copper   Order a copy of this article
    by Dipak Kumar 
    Abstract: In this article, NiSiC nano-composite coatings were fabricated using the conventional electrodeposition process, Watt's Nickel electroplating and sulfamate bath, applying on copper substrates. The goal of the present work was to improve wear resistance & hardness properties of Ni-SiC composite coatings by electrodeposition techniques. To obtain a better chemistry between SiC incorporations and Ni matrix and, afterwards, better wear resistance, the variation in the microhardness was considered as significant surface property of nanocomposites by examining the effect of various electrodeposition parameters such as, pH, temperature, current density, temperature, etc. The microhardness,778HV, and the wear resistance of the nanocomposite coatings was found to be increased with increasing content of Ni-SiC at optimized current values of 0.61A. Uniform distribution of coatings structure as cauliflower was confirmed by atomic force microscopy and scanning electron microscopy, while composition & crystallinity of Ni-SiC was confirmed by energy dispersive X-ray spectroscopy & X-ray diffractometry, respectively.
    Keywords: Wear and Hardness1; Nickel-SiC Nanocomposite Coating2; Electrodeposition3; Characterization4.

  • Study of structural and electric properties in polycrystalline Pb(Cd1/3 Ti1/3W1/3)O3 tungsten perovskite   Order a copy of this article
    by SANTOSH PARIDA, R. N. P. Choudhary, P.G.R. Achary 
    Abstract: The presence of tetragonal distortion and the highest degree of spontaneous polarization in lead titanate attracts the researchers compared to another titanate perovskite. For reducing hazardous property, one has to reduce the presence of Pb contents by substituting suitable dopants for different technological applications. A modified lead titanate Pb(Cd1/3W1/3Ti1/3)O3 perovskite is synthesized by a conventional high-temperature solid-state reaction technique. XRD pattern of the sample confirms the cubic crystal structure having space group F-43m. Full proof Rietveld analysis has been used for structural refinement. The presence of FTIR frequency bands corresponding to Ti-O, O-, W-O-W, and CdO stretching confirm that Cd2+, W6+ ions completely substitute the Ti+4 ions at the B site of the perovskite, as confirmed by the XRD obtained data. As the frequency increases from 1 kHz to 5 MHz, the activation energy (Ea) decreases from 0.767 eV to 0.089 eV. The activation energy and conductivity mechanism in the samples dominated by hopping charge carriers. Both Nyquist and Cole-Cole plots confirm the semiconducting nature of the samples and make the material technologically important.
    Keywords: Lead Titanate; Perovskite; Activation Energy; Conductivity Mechanism; Hopping Charge; Nyquist plot.

  • Physical- Mechanical Properties of steel fiber-reinforced self-compacting concrete containing natural perlite addition   Order a copy of this article
    by Sabria Malika Mansour 
    Abstract: The aim of this work is to highlight the effect of the Algerian natural perlite used as fillers addition on the workability and physical- mechanical properties of metallic fiber self-compacting concrete. Effect of the perlite is compared to that of silica fume fillers to replace limestone fillers. One control concrete without fibers containing limestone fillers, two concretes with silica fume or perlite fillers and six self-compacting concretes were elaborated with limestone, perlite and silica fume fillers separately containing 1% vol. of steel long wavy or short hooked fibers. Several tests were conducted for evaluating the workability properties in the fresh state, the density, mechanical strengths and elastic modulus in the hardened state. The results show the beneficial effect of the use of perlite as fillers. Workability properties decrease slightly but an increase of mechanical strengths and elastic modulus is much more marked with the use of the steel hooked fibers.
    Keywords: Fillers; Addition; Limestone; Perlite; Silica fume; Self-Compacting Concrete; Workability; Fiber Reinforced concrete; Steel fiber; Compressive strength; Flexural strength; Elastic modulus.

  • Structural, thermal and electrical properties of polypyrrole filled with ternary oxide Cerium aluminate   Order a copy of this article
    by Rani Sutar, Murugendrappa M.V. 
    Abstract: The effect of dispersion of fillers in different weight percentages on structural, electrical, and humidity sensing properties of polymer matrix has been investigated. Cerium-aluminate (ACO), a double-trioxide compound was used as the filler material in the polypyrrole (PPy) to get PPy/ACO nanocomposites, and the dispersion of the filler was done by an in-situ chemical-polymerization method. The nanocomposites were characterized by various techniques such as XRD, SEM with EDAX, FTIR, and TG/DTA. The room temperature electrical characterizations were carried out by using an impedance analyzer which showed that the lower (10 wt. % and 20 wt. %) and higher (30 wt.%, 40 wt.% and 50 wt.%) filler contents in nanocomposites makes them behave like dielectrics and conductors respectively. The ac-conductivity of the PPy was decreased for 10 and 20 wt.% nanocomposites and then increased for the higher wt. %. The humidity response for the pure PPy and PPy/ACO nanocomposites was studied by using an impedance-analyzer, which shows the improvement in sensing properties.
    Keywords: Humidity response; dielectric properties; polypyrrole; cerium aluminate.

  • Influence of Carbon doping on the Thermoluminescence Properties of LaAlO3 Crystal grown by Solid State Reaction Method   Order a copy of this article
    by Kadari Ahmed 
    Abstract: In this article, we report a modeling investigation of the thermoluminescence mechanisms for the important dosimetric LaAlO3:C crystals, which were grown by solid state reaction method. The aim of this work is to develop for the first time an algorithm that permits the numerical solution of the relevant sets of differential equations governing the different stages of the experimental procedure. The glow curve measured at 10K/s typically consists of three prominent peaks at 417K, 494K and 549K and a minor glow peak at around 372K. In this work, we show that this TL output behaviour can rather easily be explained within the framework of the 4T1R model. Good agreement between the experimental data and calculations from the model is obtained for this kind of dosimetric material. Results presented here confirm that the LaAlO3:C system an excellent candidate that can be used as a TL dosimeter in UV fields.
    Keywords: Lanthanum aluminate; Carbon doping; Kinetic parameters; Thermoluminescence model; Ultraviolet dosimeter.

  • Influence of interlayer temperature on microstructure of 5183 aluminium alloy made by wire arc additive manufacturing (WAAM)   Order a copy of this article
    by Karan Derekar, David Griffiths, Sameehan Joshi, Jonathan Lawrence, Xiang Zhang, Adrian Addison, Geoff Melton, Lei Xu 
    Abstract: The variations in mechanical properties compared to the traditional processed (wrought) products, porosity formation, and solidification cracking are the primary concerns that may restrict industrial applications of WAAM aluminium alloy products. Interlayer temperature is one of the crucial factors that can adversely affect the built quality and properties of material produced using WAAM. The paper aims at the possible effects of different interlayer temperatures on the geometry and microstructure of WAAM aluminium 5183 alloy as a function of varying heat input. For a given heat input, samples built using a higher interlayer temperature (100
    Keywords: Wire arc additive manufacturing (WAAM); aluminium; interlayer temperature; microstructure; layer geometry.

    by Medhavi Sinha 
    Abstract: The fiber composites are special materials consisting of unique properties such as high specific strength, high specific stiffness, corrosion resistance, high fatigue life etc. They have immense potential to replace the traditionally utilized materials, steel and aluminum for manufacturing of various components of vehicles which renders them very heavy and bulky. This paper demonstrates the feasibility of producing innovative alternative lighter composite materials using E-glass for increasing the safety, movability, performance of the military vehicles. Five different composites were synthesis without fillers and with 4% ZnO, SiO, carbon black and hybrid fillers using hand layup technique. Various mechanical tests such as tension, compression, flexural, inter laminar shear, impact and hardness test were performed on the composites to evaluate and analyze their mechanical properties for exploration of their effective utilization in automobiles. The study determined that the composite with ZnO filler manifested superlative behavior in comparison to other materials under examination.
    Keywords: Fiber composites; fillers; mechanical properties; vehicles.