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Olivia A. Graeve

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Articles by Olivia A. Graeve

First-Principles Investigation of the Transition-Metal Carbide Crystal Morphology Control Through Alloying

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By Yuchen Huang, Olivia A. Graeve, Aerospace Engineering
| Wiley Online Library Verified
1 Introduction Transition-metal carbides (TMCs) consist of a class of ceramics with a wide range of crystal phases, microstructures, and physical properties. Among them, Group IVB and VB TMCs, which are carbides of titanium (TiC), zirconium (ZrC), hafnium (HfC), vanadium (VC), niobium (NbC), and tantalum (TaC), stand out because of their superior hardness, high melting temperature, and wear resistance [1], earning them recognition as ultra-high temperature ceramics (UHTCs).
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Phase and Morphology Control of Hexagonal MoO3 Crystals via Na+ Interactions: A Raman Spectroscopy Study

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By C. Ingram Vargas-Consuelos, Marco A. Camacho-López, Victor H. Ramos-Sanchez, Olivia A. Graeve
| dx.doi.org
Abstract We present the effect of sodium ions (Na+) on the nucleation process and phase selectivity for the formation of hexagonal molybdenum trioxide crystals (h-MoO3). The phase selectivity during the reaction is attributed to the interaction of Na+ with the molecules in our precursor solution formed by metallic molybdenum dissolved in a mixture of hydrochloric and nitric acids.
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