Surface Properties and Oxidation Behaviour of Ultra High Temperature Ceramics for Sharp Leading Edges
- Paper number
IAC-06-C2.4.04
- Author
Dr. Luigi Scatteia, CIRA Italian Aerospace Research Centre, Italy
- Coauthor
Dr. Marianne Balat Pichelin, France
- Coauthor
Prof. Raffaele Savino, University of Naples "Federico II", Italy
- Coauthor
Dr. Antonio Del Vecchio, CIRA Italian Aerospace Research Centre, Italy
- Coauthor
Ms. Stefania Cantoni, CIRA Italian Aerospace Research Centre, Italy
- Year
2006
- Abstract
In this paper, the results of an in-depth experimental investigation into the efficiency of ZrB2-SiC compounds designed for hot structures manufacturing for heat radiation and for the recombination of atomic oxygen are reported. The study is focused on a high temperature regime (from 1000 to 2200 K). Total hemispherical emissivity and the recombination coefficient for atomic oxygen were characterized using the Solar Furnace apparati located at PROMES-CNRS centre in France. Also reported in this paper is a comparative emissivity analysis performed using a proprietary experimental procedure in the small arc jet gallery Small Planetary Entry Simulator (SPES) located at the University of Naples. Supportive micro-structural analyses based upon XPS, XRD and SEM were carried out on post-test samples in order to correlate the obtained results to the surface modifications occurring in the material during high temperature exposure in the two different experimental conditions (in the solar furnace, that is under subsonic flow, and in the arc-jet environment, under hypersonic flow). The results obtained under solar furnace heating and under arc jet flux are discussed and compared in order to assess the possible occurrence of different oxidation mechanism that could affect the surface properties and the performances of the UHTC.
- Abstract document
- Manuscript document
IAC-06-C2.4.04.pdf (🔒 authorized access only).
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