| About this Abstract |
| Meeting |
Materials Science & Technology 2019
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| Symposium
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Multifunctional Ceramic- and Metal-matrix Composites: Processing, Microstructure, Properties and Performance
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| Presentation Title |
Thermally-Conductive, Mechanically-Robust, Net-Shape Ceramic/Metal Composites for High-Temperature Concentrated Solar Power |
| Author(s) |
Kenneth H. Sandhage, Mario Caccia, Meysam Tabandeh-Khorshi, Grigorios Itskos, Alex Strayer, Adam Caldwell, Supattra Singnisai, Anthony Schroeder, Mark Anderson, Andres Marquez-Rossy, Edgar Lara-Curzio, Sandeep Pidaparti, Devesh Ranjan, Andrew Rohskopf, Asegun Henry |
| On-Site Speaker (Planned) |
Kenneth H. Sandhage |
| Abstract Scope |
The cost of electricity from concentrated solar power plants may be significantly reduced by operating at higher temperatures. However, a major hurdle has been the development of compact heat exchangers (HEXs) for >750oC operation with high-pressure working fluids. The maximum stresses that can be sustained by conventional stainless steels and Ni-based alloys decline rapidly above 550oC. In this talk, multifunctional cermets, such as ZrC/W composites, will be discussed as attractive alternative HEX materials.[1] At 800oC, ZrC/W composites are stiff, possess relatively high failure strengths (>350 MPa), and are 2-3 times more thermally conductive than stainless steels and Ni-based alloys. ZrC/W composites are thermally cyclable, owing to similarly low CTEs for ZrC and W. ZrC/W composites can also be fabricated in complex shapes via a cost-effective, shape-preserving reactive infiltration process.
[1] M. Caccia, et al., "Ceramic-Metal Composites for Heat Exchangers in Concentrated Solar Power Plants," Nature, 562 (7727) 406-409 (2018). |