ProgramMaster Logo
Conference Tools for 2015 TMS Annual Meeting & Exhibition
Login
Register as a New User
Help
Submit An Abstract
Propose A Symposium
Presenter/Author Tools
Organizer/Editor Tools
About this Abstract
Meeting 2015 TMS Annual Meeting & Exhibition
Symposium Novel Synthesis and Consolidation of Powder Materials
Presentation Title Structure, Microstructure and Electrical Properties of ZnO Based Varistors Obtained by Spark Plasma Sintering
Author(s) Yannick Beynet, Sophie Guillemet-Fritsch, Vincent Bley, Thomas Pérel, Frederic Malpièce, Jonathan Morel, Claude Estournès
On-Site Speaker (Planned) Claude Estournès
Abstract Scope Varistor ceramics were prepared by spark plasma sintering (SPS) using two doped zinc oxide powders. Firstly, the sintering cycle (870°C, 100 MPa) was optimized on a commercial powder to obtain dense parts (RD>99%) containing mainly ZnO grains (average size: 1μm with hexagonal structure) and additional Bi2O3 and Zn7Sb2O12 oxides. Secondly, to reduce the grains size, improve the dopants and the grains size distributions, zinc oxide powder with the same formulation was synthesised by coprecipitation. Due to the highly reactivity of such powder and the use non graphitic tools (ie WC-Co), fully dense parts were obtained under air atmosphere at a temperature as low as 400°C leading to limited ZnO grain growth (grain size ~ 0,3-0,6μm). We show that, for a given formulation, the electrical properties of the varistors greatly depend on the grain size and grain boundaries property variables induced by the microstructure of the powder and SPS sintering conditions.
Proceedings Inclusion? Planned: A print-only volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

'Industrial Grade' Titanium Parts from Powder Compact Forging and Extrusion
A Study on Dynamic Consolidation of Titanium Powder for Manufacture of Compacts and Foams
Cold Spray for Repair of Naval Components
Consolidation of Cemented Tungsten Carbide with Non-Traditional Metal Binders
Continuous-Heating Ignition Testng of Hybrid Al-Ni-CuO Reactive Composites Fabricated by Ultrasonic Powder Consolidation
D34: The Combined Effects of Alloy Composition and Porosity on Phase Transformation and Mechanical Behaviors of Powder Metallurgy Fe-Cr-Mo Steels
D35: Preparation of Hexagonal Plate-Like Hematite Particles by Hydrothermal Synthesis and Reduction to Plate-Like Iron Particles
Densification of High Purity Aluminum Nitride by Plasma Activated Sintering
Development of P/M Parts & Techniques in Japan
Disintegrable Metal Matrix Composites for Oilfield Applications
Effect of Additives on Microwave and Conventional Sintering of Barium Zinc Tantalate Ceramics
Effect of Colloidal Processing on Densification Behavior of Barium Zinc Tantalate Ceramics
Effect of TiO2 Doping on the Densification and Microstructure in High Pressure Sintering Nano Size γ-Al2O3
Fabrication and Characterization of Aluminum Composition Reinforced by Boron Nitride Nano Sheet
Fabrication of Complex-Shaped Ceramic Components through Novel Room-Temperature Injection Molding and 3D Printing of Ceramic Powder Suspension Gels (CeraSGels)
Fabrication of Diamond-WC-Based Cemented Carbide Composites by Microwave Sintering
Fabrication of High Performance n-Type Bi2Te3 Thermoelectric Materials by Powder Metallurgy Processes
High-Efficiency Production of Metal Particulate by Modulation-Assisted Machining
Hot Equal Channel Angular Extrusion (ECAE) of Thermally Stabilized Nanocrystalline Fe-Ni-Zr Alloys Produced by Mechanical Alloying
In-Situ Formed AlN Dispersed Aluminum Composite via Powder Metallurgy Route
Influence of Lattice Expansion via Annealing-Induced Carbon Intercalation on the Strength of Aluminum-Based Nanocomposite.
Influence of Magnetic Field on Dealloying of Al-15Fe Ribbons and Formation of Fe3O4 Octahedra
Manipulation of Titanium Powder for Additive Manufacturing Applications
Manufacture and Characterization of Porous Ni-Base Alloys for High-Temperature Gas Cleaning
Mechanical Damping Behavior of Powder Metallurgy Aluminum and Aluminum-Based Nanocomposites
Metal Based Additive Manufacturing Using Cold Spray Coating Technology
Microstructural Evolution of Cryomilled Boron Carbide Reinforced Al-Mg Powders
Microstructure-Deposition-Microstructure Relationships for Al-Cu Gas Atomized Powders
Microstructure and Mechanical Properties of Bulk Nanostructured Cu–Ta Alloys Consolidated by Equal Channel Angular Extrusion
Microstructure of Cold Sprayed hBN-Ni and Ni-Ni Composite Powders
Minimizing Surface Oxidation of Tungsten Nanopowders
Modeling of Operational Parameters for Cold Spray Deposition
Nano-Phase Separation Sintering for the Manufacture of Bulk Nanocrystalline Alloys
New Developments in the Korean PM Industry over the Last Decade
Ni-Based Superalloy Powder Processed Layer for Combustor Airfoils in IGCC Power Plants
Novel Processing and Characterization of Nickel-Based Oxide Dispersion Strengthened Alloys
On the Dissolution of the Surface Oxide Films on Titanium Powder Particles during Sintering
Particle Size and Cooling Rate Dependence on the Microstructure of Atomized Fe-Cu Particles
Photocatalytic Degradation of Rhodamine B over Dy-Doped TiO2 Film Synthesized through Microwave Sintering
Precipitation of Oxide during Water-Atomization of Fe-Cr-Y Alloy
Processing-Structure-Property Relations in Powder Metallurgy (PM) Processed MgY2Zn1 Alloys
Processing and Characterization of Ti-SrO Composites via Powder Metallurgy for Bone Implant Materials
Processing and Properties of Injection Moulded Alumina and Alumina Composites Using Water Soluble Binder System
Sintered Metal Fibre Porous Materials and Applications
Strengthening Behavior and Mechanisms of Extruded Powder Metallurgy Pure Ti Materials Reinforced with Ubiquitous Light Elements
Structure, Microstructure and Electrical Properties of ZnO Based Varistors Obtained by Spark Plasma Sintering
Study on the Electromagnetic Wave Absorption Ability of CIP/Graphite Composites
Synthesis and Characterization of Carbon Nanotubes Reinforced Titanium Composites via Powder Metallurgy
Synthesis and Consolidation of Inhomogeneous Ti-M(M=Ta, Mg) Composite Structures by Powder Metallurgy for Biomedical Applications
Synthesis of Cement-Like Materials from Wastes by Solid-State Reaction and Solution Combustion Techniques
Synthesis of Europium Tetrakis Dibenzoylmethide Triethylammonium
The Effect of Impurities on the Properties of SPS Sintered B4C
The Micro-Mechanical Behavior of Electron Beam Melted Ti-6Al-4V Alloy
Titanium-metal Oxides Composites through Powder Metallurgy for Orthopaedic Applications
Transformation of Interparticle Boundaries into Grain Boundaries and Interfaces during Thermomechanical Consolidation of Metallic Powders
Untitled
Use of Spark Plasma Sintering for Producing Compositionally Graded Austenitic Stainless Steel/Titanium Samples
Using Energy Efficient Microwaves to Synthesize High Performance Energy Saving Magnesium (Nano) Composites

Questions about ProgramMaster? Contact programming@programmaster.org