A Model for the Oxidation of Refractory Diborides (Preprint)
UES INC DAYTON OH
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Hypersonic applications require materials that can withstand very high temperatures. Refractory diborides appear to be the most promising candidates for these applications, from the standpoint of resistance to oxidation and evaporative loss. In this work, a mechanistic model is presented that predicts the oxidation behavior of diborides of Zr, Hf and Ti. Using available thermodynamic data and literature data on vapor pressures, good correspondence is obtained between theory and experiments for weight gain, recession and scale thickness as a function of temperature and oxygen partial pressure.
- Ceramics, Refractories and Glass
- Fluid Mechanics