Nanocomposites VI: Nanoscience and Nanotechnology in Advanced Composites: Processing-Properties-Performance of Nanocomposites
Sponsored by: TMS Structural Materials Division, TMS: Composite Materials Committee
Program Organizers: Srivatsan Tirumalai; Manoj Gupta, National University of Singapore
Thursday 8:30 AM
February 27, 2020
Room: Solana
Location: Marriott Marquis Hotel
Session Chair: Simona Murph, Savannah River National Laboratory
8:30 AM Invited
Investigating and Understanding the Mechanical and Tribological Properties of A Magnesium Hybrid Metal-ceramic Nanocomposite: Arvind Singh R1; Jayalakshmi Subramanian1; Sankaranarayanan Seetharaman2; Xizhang Chen1; Sergey Konovalov3; Srivatsan T.S.4; Manoj Gupta5; 1Wenzhou University; 2ANSYS Software Private Ltd; 3Samara National Research University; 4The University of Akron; 5National University of Singapore
A major limitation of magnesium-based materials is their poor surface properties, such as, wear, and corrosion resistance. A major challenge in potential magnesium-based components is to control their wear and friction characteristics to avoid their premature failure during service. In this presentation, Mg-5Nb metal–metal composite reinforced with varying volume fractions of nano silicon carbide (SiCn) ceramic particles (made by the technique of disintegrated melt deposition) will be presented and discussed. The improved wear resistance shown by the nanocomposites can be attributed to the conjoint and mutually interactive influences of grain refinement, presence of hard, brittle and elastically deforming SiCn particles, formation and presence of hard and brittle intermetallic phase, and formation of an oxide layer. These synergism contribute to increasing the hardness of the nanocomposites with a concomitant improvement in wear resistance. The intensity of wear mechanisms in the composites will be compared with the nanocomposites.
9:00 AM
State-of-the-Art NanoMaterials at SRNL: From Innovation to Marketplace; Fabrication of Silver-rhodium Nanomaterials for Chemical Sensing Applications: Simona Hunyadi Murph1; 1Savannah River National Laboratory / University of Georgia
Savannah River National Laboratory (SRNL) is the applied research and development laboratory at the U.S. Department of Energy’s (DOE) Savannah River Site (SRS). The laboratory applies innovative science to provide practical, high-value, cost-effective solutions to complex technical problems. This talk presents an overview of state-of-the-art nanomaterials of different sizes, shapes, and compositions developed at SRNL. Metallic nanoparticles, particularly Au, Ag, Pd, and/or metallic oxide nanoparticles (Fe2O3, TiO2, SiO2) with precisely defined properties and functions are the focus of this presentation. This talk will also describe how we are “putting nanoscience to work” at SRNL for national security missions, environmental stewardship and clean energy applications.
9:25 AM
New Electron Beam Equipment and Technologies for Production of Advanced Materials Using Vacuum Melting and Evaporation Methods Developed in SPE “Eltekmash”: Alexander Manulyk1; Nikolayi Grechanyuk1; Pavel Kucherenko1; Alexey Melnik1; 1Synergy Antech Services Inc.
We present the results of the electron beam equipment and technologies developed to produce materials and coatings, performed in Scientific and Production Enterprise "Eltekhmash" (Ukraine) in the period from 2005 to 2017. The company is intensively developing several directions of electron beam technology, including: - Development laboratory and industrial equipment for melting metals and alloys, deposition of protective coatings, manufacturing composite materials condensed from the vapor phase: - Manufacturing high purity Ni-W alloys, used as seeds in growing single-crystal blades; - Production of special titanium alloys for biomedical purposes; - Master alloys productions; - Manufacturing of quality ingots from a scrap of high–temperature alloys - Manufacturing tubular billets-cathodes made off Ni-Cr-Al-Y. Ni-Co-Cr-Al-Y heat-resistant alloys for ion-plasma coating depositions - Production of electric contacts; - Deposition of protective coatings on gas turbine blades;- Development of a variety of laboratory and production electron beam equipment with different functional capabilities.
9:50 AM
Role of Rare Earth Oxide Reinforcements in Enhancing the Mechanical, Damping and Ignition Resistance of Magnesium: Milli Suchita Kujur1; Vyasaraj Manakari2; Gururaj Parande2; Mrityunjay Doaddamani3; Ashis Mallick1; Manoj Gupta2; 1Indian Institute of Technology (Indian School of Mines), Dhanbad; 2National University of Singapore; 3National Institute of Technology Karnataka
Magnesium based nanocomposites, on account of their excellent dimensional stability coupled with mechanical integrity, have provided the much-needed impetus for utilization in both aerospace and automobile-related applications. However, the perceived easy ignition and flammability of magnesium alloys creates a detrimental safety feature which hinders their aerospace application opportunities. Incorporation of rare earth metal oxides into magnesium matrix can induce ‘reactive element effect’ (REE), due to their strong rare-earth-oxygen interactions. Along with enhancing the protective characteristics of oxides on many metals and alloys, the addition of such rare earth oxides also helps in realizing a refined microstructure and good strength-ductility combination in the composites. This manuscript presents the mechanical properties and ignition resistance characteristics of the new and improved composite materials engineered by reinforcing magnesium with rare-earth oxide nanoparticles. Rationale for the observed properties is discussed while concurrently establishing the relationship between microstructure of the engineered composites and resultant mechanical properties.
10:15 AM Break
10:35 AM
Ordered Colloidal Crystals Fabrication and Studies on the Properties of Poly(Styrene-Butyl-Acrylate-Acrylic Acid) and Polystyrene Latexes: Ikhazuagbe Ifijen1; Esther Ikhuoria2; Stanley Omorogbe1; Aireguamen Aigbodion1; 1Rubber Research Institute of Nigeria; 2University of Benin, Benin City, Nigeria
Monodisperse poly(styrene-butyl acrylate-acrylic acid) (P(St-BA-AA)) and polystyrene (PS) colloidal suspensions were prepared using emulsion polymerization technique with a view to study their variation in properties and their properties examined. The P(St-BA-AA) latex had a slightly lower glass transition temperature (Tg) (106 oC) compared to the PS microspheres (104 oC). TEM analysis revealed a core-shell morphology in the P(St-BA-AA) latex particles, as compared to the PS particles. The synthesized latex suspensions were used to fabricate mono and binary sized colloidal crystals via the evaporation-induced self-assembly approach. SEM/AFM analyses showed spherically shaped particles that readily assembled into a closely-packed three dimensional highly periodic pattern with hexagonal symmetry. Also, the smaller sized P(St-BA-AA) particles (197.3 nm) in the binary crystals arranged themselves in a well-ordered manner around the larger sized PS particles (404.9 nm). The results showed that the modification made on the functional group of PS by polymerizing with butyl-acrylate and acrylic acid produced P(St-BA-AA) latex with improved properties compared to the as-synthesized PS and this may find use in optical applications.
11:00 AM
Magnetic Field-assisted Electrodeposition of Nickel Composite Coatings: Denise Yin1; Heather Murdoch1; Efrain Hernández-Rivera1; Anit Giri1; 1CCDC Army Research Laboratory
Magnetic field-assisted electrosynthesis is a novel and innovative processing technique that presents new opportunities for microstructure control and enhanced processing efficiency. In particular, a superimposed magnetic field during electrodeposition induces a magnetohydrodynamic (MHD) effect that is generated by the Lorentz force which may enhance convective flow and has been shown to incorporate particles in excess of conventional electrodeposition. Here, Ni/Al2O3 is co-deposited with permanent Ne2Fe14B magnets in a modified Watt’s type bath. We explore different processing parameters, such as magnetic field orientation and Al2O3 particle size, and their influence on the coating structure. Nano- and micron-sized particles are examined. Small-scale wear analysis is evaluated in light of the microstructural modifications.
11:25 AM
Nanomechanical and Tribocorrosion Performance of Al-based Multilayered Thin Films: Wenbo Wang1; Wenjun Cai1; 1Virginia Polytechnic Institute and State University
Nanostructured metallic multilayers (NMMs) are emerging materials with excellent physical, mechanical, and tribological properties. Extensive previous research highlights the fact that novel deformation physics control plasticity in the NMMs when the individual layer thickness are confined to a few nanometers. In this work, the nanomechanical and tribocorrosion properties of the Al-based NMMs were studied. Nanoindentation and nanowear tests show that the hardness and wear resistance of Al/X mutlilayers strongly depends on the individual layer thickness and the other constituting material. The corrosion and tribocorrosion resistance of Al-based NMMs were evaluated through potentialdynamic polarization experiments and tribocorrosion tests under open circuit potential in simulated seawater respectively. The results reveal that the complex synergistic effects of mechanical deformation and corrosion cause very diverse tribocorrosion behavior of different NMMs. These understandings provide a good basis for material selection and design strategy of NMMs for use under complex environment.