|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Materials in Clean Power Systems IX: Durability of Materials
||Development of HfB2-ZrB2 Based Ceramics as High Temperature Electrode Materials for MHD Direct Power Extraction System
||Cody Hill, Steven J. Sitler, Krishnan S. Raja, Indrajit Charit
|On-Site Speaker (Planned)
HfB2-ZrB2 based ceramics are being studied as potential electrode materials for the futuristic magnetohydrodynamics (MHD) direct power extraction system primarily because of their good electrical and thermal conductivity. However, the variation of microstructural characteristics and mechanical/electrical properties under elevated temperature exposure is not well known. In this study, a series of solid solutions of ZrB2-HfB2 in various proportions with and without additives (such as LaB6, Gd2O3 etc.) were processed using a combined route of high energy ball milling and spark plasma sintering (SPS). The samples were characterized using XRD, SEM and TEM techniques for various microstructural characteristics. Electrical conductivity and thermal conductivity were also measured in a wide range of temperatures. Anodization of the SPSed samples was also carried out to enhance high temperature oxidation properties. This work was supported by the Department of Energy under Grant Number DE-FE0022988.
||Planned: A print-only volume