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Meeting Materials Science & Technology 2020
Symposium Manufacturing and Processing of Advanced Ceramic Materials
Presentation Title Opportunities for Tailored Grain Boundary Networks in Thermomagnetically Processed Alumina Ceramics
Author(s) Amanda Krause, Bryan Conry, Michael Kesler
On-Site Speaker (Planned) Amanda Krause
Abstract Scope Textured microstructures are often associated with unique grain boundary character distributions (GBCD) and grain boundary networks that can improve bulk material behaviors, including corrosion resistance and fracture toughness. Thermomagnetic processing is an opportunity to create textured grains and, thus, preferred GBCD in polycrystalline ceramic monoliths, which are otherwise limited by the random nature of powder processing. We investigate how magnetically-induced textures affect the GBCD and grain boundary networks in α-alumina. Alumina slips are cast in a magnetic field of various strengths and subsequently sintered and annealed at high temperatures (1400-1600C). The GBCD and grain boundary network are evaluated via serial sectioning in a dual beam focused ion beam/scanning electron microscope with electron backscattered diffraction (EBSD). The ramifications for tailoring GBCD and grain boundary networks in bulk ceramics will be discussed.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Progress Report on the Synthesis and Characterization of MAX and MAB Phases
A Rational Design of Ultra-uniform Nanocrystalline Materials
Design, Synthesis and Processing of Novel Ionic Conductors for All-solid-state Batteries
Developing Materials and Coating Technologies for Mitigation of Lunar Dust Adhesion and Abrasion
Fabricating Alumina with Heterogeneous Microstructure Using Integrated Additive/Subtractive Manufacturing (IASM)
Fusion Welding of Structural Ceramics
Identifying Multidisciplinary Research Opportunities in Ceramic Processing
Indirect Additive Manufacturing of Ceramics
Investigating the Dependence of Microstructure Evolution in Alumina on the Liquid Phase Chemistry in the CaO-Al2O3-SiO2 System: Densification, Grain Growth and Secondary Phase Formation
Laser Shock Processing of Silicon Carbide Ceramics
Neutrons Guide Materials Design and Synthesis of Functional Oxides
Opportunities for Tailored Grain Boundary Networks in Thermomagnetically Processed Alumina Ceramics
Optimized Etching of Porcelain and Polycrystalline Alumina with a Glass Phase
Processing and Properties of High Thermal Conductive Silicon Nitride Ceramics
Self-bonded Refractories for Investment Casting Mold Manufacture
Synthesis and Flash Sintering of (Hf1-xZrx)B2 Solid Solution Fine Powders
Thermal Stability and Mechanical Properties of High-entropy Carbide Ceramics with Submicron Grain Size Fabricated by Spark Plasma Sintering
Transparent Ceramics by Lithography-Based Additive Manufacturing

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