Transcription of Ultra High Temperature Ceramics: Densification, …
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Ultra High Temperature Ceramics: Densification, …
AL03-08 1 Issue 3 - November 2011 - Ultra high Temperature Ceramics: Densification, Properties and Thermal StabilityHigh Temperature MaterialsUltra high Temperature Ceramics: Densification, Properties and Thermal Justin, A. Jankowiak(Onera)E-mail: flights, re-entry vehicles, and propulsion applications all require new materials that can perform in oxidizing or corrosive atmospheres at temperatures in excess of 2000 C and sometimes over the course of a long working life. Ultra high Temperature Ceramics (UHTCs) are good candidates to fulfill these requirements. Within this family, the ZrB2 and HfB2 based composites are the most attractive. The oxidation resistance of diboride-based compounds is better than that of SiC-based ceramics thanks to the formation of multi-oxide scales composed of a refractory oxide (skeleton) and a glass component.
AL03-082 Issue 3 - November 2011 - Ultra High Temperature Ceramics: Densification, Properties and Thermal Stability Since the 1950s, …
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