|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Pan American Materials Congress: Materials for Transportation and Lightweighting
||Tailored Carbide Powder Morphologies: Synthesis, Sintering, and Mechanisms of Formation
||Tianqi Ren, Olivia A. Graeve
|On-Site Speaker (Planned)
Transition metal carbides such as tantalum carbide (TaC), hafnium carbide (HfC), zirconium carbide (ZrC), and niobium carbide (NbC), are classified as ultra-high temperature ceramics (UHTCs) due to their extreme melting temperatures. Active research has focused on their applications as thermal protection coatings for hypersonic vehicles and rocket engine nozzles. We are exploring the possibility of controlling the particle morphology of carbide nanoparticles through dopant incorporation using a solvothermal method. We have observed promising cubic-faceted sharply-edged particles in TaC:15Y (15 at% Y), TaC:10Zr (10 at% Zr) and ZrC:10Ta (10 at% Ta) under scanning electron microscopy and transmission electron microscopy with sizes typically ranging from 20 to 100 nm. We believe that the dopants are effective in modifying the thermodynamic surface energies of the powders and the growth kinetics during synthesis. Sintering of the powders is achieved using spark plasma sintering to determine the effect of powder morphology during consolidation.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)