| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Powder and Ceramic Materials Science
|
| Presentation Title |
Low-cost Forming and Reactive Melt Infiltration Processing of High-temperature, Thermally-cyclable Carbide/Metal Composites in Complex, Near Net Shapes for Renewable Energy Applications |
| Author(s) |
Yujie Wang, Priyatham Tumurugoti, Zhenhui Chen, Alex R. Strayer, Adam S. Caldwell, Saeed Bagherzadeh, Grigorios Itskos, Kevin P. Trumble, Mario Caccia, Kenneth H. Sandhage |
| On-Site Speaker (Planned) |
Yujie Wang |
| Abstract Scope |
Certain co-continuous (interpenetrating) carbide/metal composites can exhibit attractive combinations of high-temperature properties, including higher erosion resistance, stiffness, and creep resistance than many metals, and higher toughness and thermal conductivity than many ceramics. In this talk, the near net-shape fabrication of thermal-expansion-matched (thermally-cyclable) ZrC/W composites will be discussed. The forming (e.g., tape casting, pressing, 3-D printing) of WC/organic mixtures, followed by organic pyrolysis and initial stage sintering (for WC particle necking), has provided porous, rigid WC bodies (“preforms”) with desired 3-D shapes and surface features. Such porous preforms have then been converted into near net-shaped ZrC/W composites (<1% dimension changes) via pressureless infiltration, and displacement reaction, with a Zr-bearing liquid. The increase in internal solid volume, upon WC conversion into ZrC and W, has resulted in solid filling of prior pores to yield dense ZrC/W composite bodies. The use of ZrC/W and related composites for renewable energy production will be discussed. |
| Proceedings Inclusion? |
Planned: |