Ames Laboratory, Materials Science and Engineering
Journal or Book Title
Journal of Alloys and Compounds
We present a design concept for developing ZrB2-SiC-AlN composites with enhanced oxidative stability at ultra-high temperatures (∼2000 °C) and low pressures (100 Torr). The oxidative stability of these materials arises from a protective silica based scale. However, active oxidation of SiC above 1700 °C presents a challenge, which we circumvent through the in-situ growth of a zirconia layer that serves as a thermal barrier, ensuring that the effective temperature at the zirconia/Si rich subscale is less than the active oxidation temperature. The design concept is validated by a series of ultra-high temperature oxidation experiments under static as well as cyclic conditions.
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Ouyang, Gaoyuan; Besser, Matthew F.; Kramer, Matthew J.; Akinc, Mufit; and Ray, Pratik K., "Designing oxidation resistant ultra-high temperature ceramics through the development of an adherent native thermal barrier" (2019). Ames Laboratory Publications. 434.
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