The overall objective of this 3-year project was to achieve controlled synthesis of carbon-rich hafnia, Hf02-xCy, and investigate the fundamental and high-temperature properties of this material. Hf02-xCy is naturally formed as a compact and pore-free oxide interlayer during oxidation of hafnium carbide (HfC), where it is though to act as a primary oxygen diffusion barrier. The specific project goals were to: 1) use pulsed laser deposition (PLD) to establish routes ...
We have demonstrated the importance of the O + N surface reaction for catalytic atom recombination in dissociated nitrogen oxygen mixtures. This was accomplished using numerical and experimental studies in a tube side arm reactor, a microwave discharge to generate atomic nitrogen and an NO titration technique to generate different mixtures of O and N atoms. In the first approach, two photon LIF of atomic oxygen and atomic nitrogen were ...
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