IRJMSA (2017), Vol. 1, Issue 01

  • Simulation of the Dendritic Growth Velocity for Binary Alloy Al-Cu in the Undercooled System

    Simulation of the Dendritic Growth Velocity for Binary Alloy Al-Cu in the Undercooled System A. F. Ferreiraa,*, M. A. Oliveira a, D.M. Silva a, M.M.V. Valentea, J.J. Passos and A.R.B. Costa a a Graduate Program on Metallurgical Engineering, Universidade Federal Fluminense, 27255-125, Volta Redonda, Brazil. The phase-field model was applied to simulate the solidification kinetics to undercooled Al-Cu alloy. The relationships between material properties and model parameters are presented. The diffusivity of solute in the solid region and liquid and liquidus…

  • Enhancing the liquid phase exfoliation of graphite in both aqueous and organic mixtures

    Enhancing the liquid phase exfoliation of graphite in both aqueous and organic mixtures a,* M.P. Lavin-Lopez, a J.L. Valverde, a L.M. Dominguez-Delgado, a L. Sanchez-Silva and a A. Romero a Department of Chemical Engineering, University of Castilla-La Mancha, Avenida Camilo José Cela 12, Ciudad Real, Spain, 13071 Two different solvent mixtures, aqueous and organic, were used in the graphite liquid phase exfoliation. These solvent mixtures were selected through a detailed study of Hansen Solubility Parameters. Different operational sonication parameters (sonication…

  • Role of Dispersion and Functionalization on Mechanical Properties in Carbon Nanotube-Polymer Composites

    Role of Dispersion and Functionalization on Mechanical Properties in Carbon Nanotube-Polymer Composites Sai Praveen Kumar Medisetti1 and Dr. Nicholas Roberts1 1 Department of Mechanical and Aerospace Engineering, Utah State University, Logan, Utah 84322, USA Carbon nanotubes (CNTs) exhibit excellent mechanical and thermal properties. Designing composites that employ CNTs as the reinforcing or filler material offer the potential to create bulk materials with greatly enhanced mechanical and thermal properties. Unfortunately, the resulting property enhancement in CNT, and other carbon nanomaterial, enhanced…

  • Evaluation of commercial and fresh-picked Origanum vulgare after dehydration

    Evaluation of commercial and fresh-picked Origanum vulgare after dehydration Vanessa Cristina dos Santos Peixoto de Oliveira1, Maria Inês Bruno Tavares1, Eduardo Miguez Bastos da Silva1, Paulo Sérgio Rangel Cruz da Silva1, Tiago Venâncio2 1Universidade Federal do Rio de Janeiro, Instituto de Macromoléculas Professora Eloisa Mano, Av Horácio Macedo 2030, Bloco J, Centro de Tecnologia, Ilha do Fundão, Rio de Janeiro, RJ, Brazil, CEP 21941-598 2Departamento de Química, Universidade Federal de São Carlos, São Carlos, SP, Brazil Origanum vulgare Lamiaceae is one…

  • Vinyl Ester/Glass Microballoon Syntactic Foams with Low Density

    Vinyl Ester/Glass Microballoon Syntactic Foams with Low Density Salleh1, 2, M.M. Islam*1, J.A. Epaarachchi1, Haibin Su3 1Centre for Future Materials, Faculty of Health, Engineering and Sciences, University of Southern Queensland, Toowoomba, Queensland 4350, Australia 2Universiti Kuala Lumpur, Malaysian Institute of Marine Engineering Technology, 32200, Lumut, Perak, Malaysia 3Division of Materials Science, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798. In this study, the synthesis and characterization of vinyl ester/glass microballoon syntactic foams with different weight percentages are investigated. Both the tensile…