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Meeting Materials Science & Technology 2019
Symposium Processing and Performance of Materials Using Microwaves, Electric and Magnetic Fields, Ultrasound, Lasers, and Mechanical Work – Rustum Roy Symposium
Presentation Title Magnetic Field-Assisted Freeze Casting of Porous Ceramic Structures
Author(s) Jihyung Lee, Robert Wheeler, Samir Aouadi, Diana Berman , Marcus Young, Raymond Brennan
On-Site Speaker (Planned) Jihyung Lee
Abstract Scope Porous ceramic materials are lightweight, cost-effective, and can be used in dense bulk composite structures with high impact-absorbing capabilities. A new approach was demonstrated for creating porous ceramic structures via magnetic field-assisted freeze casting. The freeze casting method utilizes a phase separation of a premixed solution of water and ceramic powders due to a volume expansion during solidification of water to ice. The magnetic field allows for a more controlled alignment of the pores during freezing. After freezing, the resulting structure is sublimated and sintered, resulting in a porous ceramic structure. In this study, porous SiC ceramics were produced by freeze casting with and without an applied magnetic field. Microstructural variations were evaluated based on powder and solution compositions, freeze casting temperatures, and magnetic field strengths. Samples were characterized using X-ray diffraction, SEM with EDS, PPMS, and Micro-XCT. Mechanical properties of these microstructural variations were also investigated.
Proceedings Inclusion? Planned: At-meeting proceedings


Advanced In-Line Nanocrystallization of Amorphous Metal Ribbon (AMR) Alloys Through Mechanical and Electromagnetic Fields
An Irreversible Thermodynamic Perspective on Chemical Reaction Kinetics in Ceramic Processing under Resonant Microwave-fields
Characterization of the Native Thin Oxide Layer of Copper Metal Powder Sintered via Microwaves
Effect of Alternating Electromagnetic Field on Extracellular Polymeric Substances Derived from Biofilms And Its Mechanism
Effect of Pulsed Electric Current on Metastable Austenitic Steel
Effective Permittivity of Metal/Ceramic Composites and Microwave Heating Characteristics
Electric Current Annealing of Zircaloy Alloy and Associated Mechanisms
Electro-pulse and High Magnetic Field Annealing of Cold-Rolled NiFe
Exploration of Phase Transformations in alnico and its Implications for Magnetic Annealing
In-situ High Spatial Resolution Two-color Thermography in Micrwoave Selective Heating System
Locally Activated Solution Processing Would be Preferable Than General Hydrothermal/Solvothermal Processing Using Autoclaves
Magnetic Field-assisted Electrodeposition of Nickel Composite Coatings
Magnetic Field-Assisted Freeze Casting of Porous Ceramic Structures
Microwave Effects in Heterogenous Materials: A Study on Catalysis
Modeling Microstructural Evolution under Applied Magnetic Fields
P2-70: Characterization of Graphite-Si-SiC Ceamics Processed by Microwave Assisted Reactive Melt Infiltration
Proposal of Mining Method of Methane Hydrate by Microwave
Radio Frequency and Microwave Heating of Preceramic Polymers and its Application in Silicon Carbide Processing
Stage I Laser Flash Sintering
Surface-charge Mobility Theory: An Explanation for Certain "Microwave Effects"
Thermal Analysis of a High Temperature Coaxial Dielectric Test Cell
Ultrasonic and Vibration Enhanced Materials Processing
Vapor Dephosphorization Kinetics from Steel Making Slag by Microwave Rapid Heating

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