Characterization of Minerals, Metals and Materials: Characterization of Polymers and Composites I
Sponsored by: TMS Extraction and Processing Division, TMS: Materials Characterization Committee
Program Organizers: Jian Li, CanmetMATERIALS; Mingming Zhang, Baowu Ouyeel Co. Ltd; Bowen Li, Michigan Technological University; Sergio Monteiro, Instituto Militar de Engenharia; Shadia Ikhmayies; Yunus Kalay, Middle East Technical University; Jiann-Yang Hwang, Michigan Technological University; Juan Escobedo-Diaz, University of New South Wales; John Carpenter, Los Alamos National Laboratory; Andrew Brown, Devcom Arl Army Research Office
Thursday 8:30 AM
February 27, 2020
Room: Theater A-4
Location: San Diego Convention Ctr
Session Chair: Sergio Monteiro, Military Institute of Engineering; Bowen Li, Michigan Technological University
8:30 AM
Quasi-plastic Zone Characterization of Regular and Si-doped Boron Carbide: Sisi Xiang1; Kelvin Xie1; 1Texas A&M University
Boron carbide (B4C) is a hard and lightweight material, which has many engineering applications. However, B4C loses its strength and toughness when subjected to high shear stresses. To improve its mechanical properties, the pervious computation work has suggested micro-alloying B4C with Si. Very limited understanding of the failure mechanism of boron carbide, both Si-free and Si-doped, under high shear stress conditions is due to the lack of direct experimental observation at the relevant length scale for damage zone. Here we investigate the local deformation microstructure of regular and Si-doped boron carbide under indents, using a novel precession electron diffraction technique and high-resolution transmission electron microscopy. We observed that Si-doped boron carbide displays dispensed micro-cracks, while Si-free boron carbide exhibits major local cracks and low interfaces.
8:50 AM
Synthesis and Characterization of Ultra-hard Ceramic AlMgB14-based Materials Obtained from AlxMgy Intermetallic Powder and Boron Powder by the Spark Plasma Sintering: Ilya Zhukov1; Pavel Nikitin1; Alexander Vorozhtsov1; Maxim Boldin2; 1Tomsk State University; 2Lobachevsky State University of Nizhni Novgorod
In this work, AlMgB14-based materials were produced from the intermetallic AlxMgy powder and boron powder using mechanical treatment with a planetary mill and subsequent spark plasma sintering (SPS). Phase composition and structure of obtained materials were examined. Phase composition of sintered material is represented by the AlMgB14 phase (~95 wt. %) and the spinel phase MgAl2O4 (~ 5 wt. %). The sintered bulk sample has a non-porous structure. The formation of the spinel phase is explained by the presence of oxygen in the raw boron powder.
9:10 AM
Microstructure Evolution of Additively Manufactured TiC Reinforced Graded Metal Matrix Composite: Jianshen Wang1; Juan Escobedo-Diaz1; Evgeny Morozov1; Daniel East2; Kun Yang2; 1University of New South Wales; 2Commonwealth Scientific and Industrial Research Organisation (CSIRO)
Ceramic reinforced Metal Matrix Composites (MMC) have advantages over traditional metallic materials, such as higher hardness, strength and fracture toughness, which makes them suitable for ballistic and defence applications. In this research, an in-situ synthetized TiC reinforced Ti-Ni matrix sample was additively manufactured with Ti64 powders and Ni coated graphite powders. Input of Ni coated graphite powders increases from bottom to top of the sample to create a chemical gradient. Microstructure of the graded sample was examined using optical and scanning electron microscopy. The characterization results show that TiC dendrites are in-situ synthesized within the metal matrix that contains α-Ti, Ti2Ni and TiNi. Morphologies and proportions of these phases change with the variation of chemical composition. Mechanisms of the evolution of microstructure is further analysed. The gradual variation of microstructures indicates that 3D printed graded MMC can provide gradient properties that are preferable for ballistic applications.
9:30 AM
Compressive Response of Ice-templated Ceramic-polymer Composites in Relation to Composition, Microstructure and Loading Orientation: Dipankar Ghosh1; Sashanka Akurati1; Justine Marine1; 1Old Dominion University
Bioinspired ceramic-polymer composites with multilayered architecture have drawn significant attention because of the possible synergy of strength and damage-tolerance. Ice-templating is a unidirectional solidification process in which phase separation of solvent crystals and ceramic particles followed by freeze drying and sintering result in ceramic foams with directional porosity. Due to low pore tortuosity, polymer infiltration of ice-templated ceramic foams has emerged as a promising and versatile technique to develop this class of novel composites. It is expected that for compressive loading orientation parallel to ceramic and polymer layers, material response will be influenced by the ceramic phase. Whereas, for compressive loading orientation perpendicular to the layers, polymer phase will have significant influence. In this presentation, we will discuss about the effects of composition (ceramic to polymer ratio), morphology of ice-templated sintered ceramic phase, and loading orientation on uniaxial compressive response to shed light on the structure-property relationships.
9:50 AM Break
10:05 AM
A Bibliometric Analysis of the Strategy and Performance Measurement of the Polymer Matrix Nanomaterials Development Scenario Globally and the Participation of Brazil: Robson Costa1; Esperidiana Barretos de Moura1; 1Nuclear and Energy Research Institute
Extensive studies have been conducted worldwide on the strategy for the development of nanomaterials. One of the known strategies for this has aroused interest in the market is the incorporation of the nanoparticles, extracted from the residues in the matrices of the polymers for the production of environmentally correct nanocomposites. This work presents a survey of the scientific knowledge of nanomaterials of the polymer matrix and a panoramic view of the evolution of these nanomaterials are subject, in order to meet the criteria of sustainable development of due to the environmental concerns. This study also intends to use of bibliometric tools to database acquisition and analysis of bibliographic reviews for an evaluation of the scenarios in the world on the development of polymeric nanomaterials based on three different classes of polymeric nanocomposites: polymer/clay; polymer/graphene and polymer/ nanocellulose nanocomposites.
10:25 AM Cancelled
Evaluation of Biodiesel Obtained from Waste Cooking Oil Purified with A Modified Clay: Christiano Gianesi Bastos Andrade1; Melissa Rigue Shimba1; Gabriela Souza Freitas1; Leticia Mayumi Kobayashi1; Samuel Marcio Toffoli1; Francisco Rolando Valenzuela Diaz1; 1Polytechnic School - University of Sao Paulo
In order to meet the current environmental demand in the reduction of greenhouse gas emissions (GHG), and the preservation of water with the reduction of the incorrect disposal of residues, particularly soybean oil after consumption, the objective of this paper is to evaluate the biodiesel obtained from waste cooking oil (WCO) purified using a Brazilian clay after a modified acid treatment, less aggressive to the environment. The clay, before and after the treatment, was characterized by XRD, FTIR, and SEM/EDS. The biodiesel had its appearance, color, kinematic viscosity, density, water content, acidity level, saponification index, and combustion behavior measured. The results indicated that the biodiesel meets the requirements of the Brazilian standard for biodiesels, with the exception of a higher water content. Therefore, the effectiveness of the purification process of the WCO using the modified Brazilian clay was demonstrated.