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Meeting Materials Science & Technology 2020
Symposium 12th International Symposium on Green and Sustainable Technologies for Materials Manufacturing and Processing
Presentation Title Effects of Transition Metals and External Field on The Evolution of Polymer-Derived Si-O-C Ceramics
Author(s) Kathy Lu, Ni Yang, Jiaqi Zheng
On-Site Speaker (Planned) Kathy Lu
Abstract Scope Polymer-derived ceramics (PDCs) represent a relatively new class of materials due to a series of advantages, such as chemical, thermal, and oxidation stability, over classical ceramics. In this study, iron-, cobalt-, and nickel-modified silicon oxycarbides (SiOC) are synthesized at different temperatures. The order of catalytic activity is iron > cobalt > nickel, in agreement with the activation energy calculation. The different phase compositions of the Fe-, Ni-, or Co-activated SiOC materials are rationalized by in-depth understanding of the phase composition and crystallization of the SiOC systems. Electrically conductive C-SiOC-SiC and C-SiC-TiC nanocomposites with a dense and homogenous structure can be obtained upon flash sintering under electric field, Joule heating and electromigration. Through proper precursor and additive selection, as well as thermodynamic and kinetic understanding, in-situ formation of C-SiOC-SiC and C-SiC-TiC nanocomposites is realized via phase separation and carbothermal reaction. High oxidation resistance and thus thermal stability are achieved.
Proceedings Inclusion? Planned: At-meeting proceedings

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Sustainable and Energy-efficient Electrochemical Technology for Dewatering of Cellulosic Nanomaterials
Amino Acid-based Single Source Precursors for Bimetallic Molybdates
An Alternative Optimization Route for the Recovery of Stainless Steel Alloying Elements
Ceramics for the Circular Economy
Conditions for electrolytic reduction of titanium from binary mixed-oxide melt
Development of a Separation Process of NBR/HNBR Rubber from Metal Substrate
Effects of Transition Metals and External Field on The Evolution of Polymer-Derived Si-O-C Ceramics
Green Process for Recycling of Nickel Hydroxide from End of Life Batteries into Films and Membranes
Introductory Comments: 12th International Symposium on Green and Sustainable Technologies for Materials Manufacturing and Processing
Manganese Dioxide Compounds for Carbon Capture and Storage
Microwave-assisted Pretreatment of Coal Fly Ash for Enhanced Recovery of Rare-Earth Elements
Microwave-assisted Synthesis of Lanthanide-based Nano- and Microscale Materials
On the Design of Porous Materials by Using Agriculture Based Precursors
Pressureless and Spark Plasma Sintering of Lunar Soil Simulants
Processing and Mechanical Characterization of Continuous Natural Fiber Reinforced Composites
Solid State Single Crystal Growth of YAG by SPS Sintering
Studies on Electrolyte, Anode and Cathode for Developing Safe Sodium-ion Battery Technology
Thermal Insulators with Macroscopic and Microscopic Anisotropy Created by Gelation Freezing Method with Alumina Platelets and Nano-rods

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