|About this Abstract
||Materials Science & Technology 2019
||Multifunctional Ceramic- and Metal-matrix Composites: Processing, Microstructure, Properties and Performance
||Thermally-Conductive, Mechanically-Robust, Net-Shape Ceramic/Metal Composites for High-Temperature Concentrated Solar Power
||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
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. 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.
 M. Caccia, et al., "Ceramic-Metal Composites for Heat Exchangers in Concentrated Solar Power Plants," Nature, 562 (7727) 406-409 (2018).