About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Self-organizing Nano-architectured Materials
|
Presentation Title |
3-dimensionally Ordered Interpenetrating Tungsten-silicon Oxycarbide Nanocomposites for High-temperature Applications |
Author(s) |
Kevin Schmalbach, Zhao Wang, R. Lee Penn, David Poerschke, Antonia Antoniou, Andreas Stein, Nathan Mara |
On-Site Speaker (Planned) |
Kevin Schmalbach |
Abstract Scope |
Metal-ceramic nanocomposites display unique mechanical properties due to synergy between their parent components. We have created an ordered tungsten-silicon oxycarbide nanocomposite intended for use in high temperature applications. Colloidal templates were used to create tungsten inverse opals with approximate ligament thicknesses of 30 nm and window openings of 225 nm. The inverse opals were further infiltrated with preceramic polymer precursor to form amorphous silicon oxycarbide. The resulting structure was characterized with electron microscopy, x-ray diffraction, and spectroscopic techniques to determine the crystalline phases and nanocomposite morphology under different processing conditions. The mechanical properties of the nanocomposite were tested via in situ micropillar compression from 30 to 575 °C, revealing distinct deformation modes at higher temperatures and displaying a 22-fold increase in maximum strength at 30 °C as compared to the tungsten inverse opal alone. |
Proceedings Inclusion? |
Undecided |
Keywords |
Mechanical Properties, Composites, High-Temperature Materials |