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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Late News Poster Session
Presentation Title N-30: Synthesis and Characterization of Next-generation Multiphase Silicon Nitride-based Ceramics
Author(s) Katherine Ann Brizzolara, Curtis Martin, Kevin Hemker
On-Site Speaker (Planned) Katherine Ann Brizzolara
Abstract Scope Structural ceramics for use in extreme environments must meet stringent requirements. The current study was undertaken to show that multi-phase Si2ON2/Si3N4/BN can be created using a novel two-step processing technique. Nitridation in a tube furnace turns Si, SiO2 and BN powders into α-Si3N4 and then β-Si3N4, while maintaining BN in the matrix. We will contrast nitridation of Si3N4 from silicon powder versus silica powders. Calcining the product in a graphite furnace can lead to Si2ON2, which has improved mechanical properties due to elongated grains. The details of Si2ON2 nucleation and growth are being studied and optimized. The plate-like BN grains further improve the toughness of the overall material. Moreover, processing the multi-phase ceramic in this manner facilitates net-near shape processing, eliminating the need for hot pressing.
Proceedings Inclusion? Undecided
Keywords Ceramics, High-Temperature Materials, Powder Materials


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A-62: Additive Manufacturing of Functionally Graded Soft Magnetic Alloys
A-63: Additive Manufacturing of TiNiSn Half-Heusler Thermoelectric Compound
A-64: As-Deposited Microstructure and Strain Rate Dependence of Aluminum Alloy 7020 Produced via Additive Friction Stir Deposition
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A-66: Fatigue Life Predictions of Additive Friction Stir Deposition Repairs using a Smooth Particle Hydrodynamic Model
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A-68: Investigation of the Simple Layer Made by Additive Manufacturing on Forging Tools
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A-72: Neutron Diffraction Measurement of Residual Stresses in AFSD AA6061 Deposits
A-74: Powder Particle Impact and Pore Release Behavior in Laser, Powder-blown Directed Energy Deposition
A-75: Powder Spreading Mechanism in Laser Powder Bed Fusion Additive Manufacturing: Experiments and Computational Approach Using Discrete Element Method
A-76: Recyclability Study of APO-BMI
A-77: Tooling Influence on Deposition Width in Additive Friction Stir Deposition of AA 6061
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N-31: The Effect of Sampling Direction and Mechanical Characterization of the Friction Stir Processed TIG Welded Joints
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O-23: Oxidation Studies of UN/UB2
O-24: Radiation Enhanced Diffusion Along Fast Pathways in Model Oxides
O-25: Semi-empirical Modeling of Irradiation Induced Dimensional Change of Nuclear Graphites
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