ProgramMaster Logo
Conference Tools for 2024 TMS Annual Meeting & Exhibition
Register as a New User
Submit An Abstract
Propose A Symposium
Presenter/Author Tools
Organizer/Editor Tools
About this Abstract
Meeting 2024 TMS Annual Meeting & Exhibition
Symposium Simulations/Experiments Integration for Next Generation Hypersonic Materials
Presentation Title High-temperature Oxygen Plasma Experiments and Atomistic Simulations of Active Oxidation in Nanocrystalline SiC Woven Fibers
Author(s) Frederic Sansoz, Luc Capaldi
On-Site Speaker (Planned) Frederic Sansoz
Abstract Scope High-temperature oxidation of nanocrystalline SiC fibers is critical for the deployment of advanced flexible thermal protection systems such as hypersonic inflatable aerodynamic decelerators. Experimental evidence shows that woven SiC ceramic fibers are prone to accelerated fiber embrittlement under high-temperature oxidation in dynamic oxygen environments. The nanocrystalline structure of the constituent fibers impacts the reaction kinetics and phase transformations during active oxidation. This talk will present large-scale molecular dynamics simulations with a reactive force-field, supported by direct observations from high-enthalpy oxygen plasma experiments, to elucidate the complex roles of grain boundaries on oxidation kinetics and the nature of oxides produced in both monocrystalline and nanocrystalline 3C-SiC between 1100K and 2000K. We find that nanocrystalline SiC exhibits two distinct oxidation kinetics with a transition at 1500K due to the formation of a liquid Si phase at the SiC/Si oxide interface. Incoherent grain boundaries promote the stability of this interfacial liquid phase.
Proceedings Inclusion? Planned:
Keywords Ceramics, High-Temperature Materials, Phase Transformations


CALPHAD-based Thermal Conductivity Modeling Appended with Porosity Effects for Ultra-high Temperature Ceramics Suitable for Hypersonic Applications
Correlative Multiscale 3D Investigation of Damage in Angle-interlocked Ceramic Matrix Composites
Design and Rapid Solidification Analysis of Refractory Multi-principal Element Alloys
First-principles Calculations of Diffusion Coefficients in High-temperature Carbides
Foundational Molecular Dynamic Models and Experiments of SiC Oxidation for Materials Development in Extreme Environments
High-temperature Oxygen Plasma Experiments and Atomistic Simulations of Active Oxidation in Nanocrystalline SiC Woven Fibers
Mechanical and Structural Characterization of Ultra-fast Boriding Process on Refractory Metals
Mesoscale Thermomechanical Modeling of Woven Carbon Composites
Metal Di-boride (MB2 | M = Ti, Zr, Nb, Hf, Ta) Properties Above 3000 ˚C
Rapid Computational Design and Experimental Validation of Ductile High Entropy Alloys for Extreme Environments
Size Effect at High Temperature in Additive Metals

Questions about ProgramMaster? Contact