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Meeting MS&T22: Materials Science & Technology
Symposium Manufacturing and Processing of Advanced Ceramic Materials
Presentation Title Doping Alumina with Carbon?
Author(s) Li-or Cohen, Priyadarshini Ghosh, Rachel Marder, Wayne D. Kaplan
On-Site Speaker (Planned) Wayne D. Kaplan
Abstract Scope Alumina (α-Al2O3) is commonly sintered in air, but several sintering techniques such as spark plasma sintering (SPS) use graphite dies. Alumina sintered in graphite furnaces often has a dark grey or even black color, and there is debate in the literature regarding the actual role of carbon on sintering and grain growth. The solubility limit of carbon in 99.99% pure alumina equilibrated at 1600C under flowing He in a graphite furnace was measured using a wavelength dispersive spectrometer mounted on a scanning electron microscope. The solubility limit of carbon in alumina was found to be 3940 at. ppm, and it is believed that at low oxygen partial pressures carbon-hydrogen species substitutes oxygen which is charge-compensated by oxygen vacancies. Doping alumina with carbon at concentrations below the solubility limit does not impede densification and reduces grain growth. Doping above the solubility limit hinders densification during sintering.
Proceedings Inclusion? Planned: At-meeting proceedings

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Comprehensive Approach to Ceramic Forming Processes
A Novel Approach to Estimate the Hamaker Constant of Ceramic Systems
A Polyvinyl Pyrrolidone Based Binder for PZT Ceramics
Alumina-based Coatings for Metal-cutting Applications
Ceramic Binder Jetting Additive Manufacturing
Characterization of Early Stage Sintering in Hydroxyapatite via Thermal Conductivity Measurements
Cold and Flash Sintering of Metal-doped LLZO for Solid-State Battery Applications
Cold Sintering of Potassium Sodium Niobate, K0.5Na0.5NbO3
Current Progress in Synthesis and Design of Ternary Phases
Densification and Phase Analysis of Zirconium Carbide Ceramics with Different Carbon Contents
Development of CeO2 Stabilized ZrO2 Inks for DIW
Development of Textured UHTC Borides Using Extremely Low Magnetic Fields
Doping Alumina with Carbon?
Fabrication and Characterization of Dense Advanced Ceramic Coatings by Aerosol Deposition
Fabrication and Microstructure Representation of Heterogeneous Gradient Complex Materials
Flash Sintering of Ceramics: Towards Homogeneous Components with Improved Mechanical Properties
High Throughput, Ultra-fast Laser Sintering of Alumina Sample Array for Establishing the Machine-learning-based Mapping Between Microstructure and Hardness
Impact of Embossing Geometry on the Replication Accuracy of Microchannels in Tape Cast Ceramics
Investigation of Electrical Properties of BaTiO3-PEEK cComposite Processed by Cold Sintering
Investigation of Lamination Approaches for SiC-filled Thermoplastic Polymer Blends
Multi-Material 3D Printing of Ceramics: Process Overview and Successful Trial Examples
Neutron Scattering Visualizing Defects Generation and Structure Recovery in Ball-milled Spinel Oxide
Open Platform Material Development for Additive UV Polymer Manufacturing
Passive pH Control Using Ceramic Particles
Preparation of BaTiO3 Composites by Cold Sintering Process
Process Capability of Lithography-based Ceramic Manufacturing
Processing of High Entropy Garnet Optical Ceramics
Role of Processing and Microstructure on the Phase Transformation in High Entropy Oxides
Surface Area Reduction Behavior of Various Forming Methods of Alumina
The Correlation of Mullite Formation in Porcelains with the Glass Formation Boundary
The Optimization of Field Assisted Sintering Technology and Processing for Ultrahigh Temperature Ceramics for Extreme Environments
Thermal and Mechanical Properties of Freeze-tape Cast Derived Ceramic-metal Composites
Ultra-fast Densification of UHTC ZrB2
Ultrafast High Temperature Sintering of Ceramic Materials for High Temperature Applications
Ultrafast Sintering with and without Electric Fields and Electrochemically Controlled Microstructural Evolution
Utilizing Cold Sintering in the Design and Integration of New Functional Composite Materials

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