Abstract
Ultrahigh temperature ceramics (UHTCs) were analyzed for their suitability in hypersonic flight conditions using balanced heat equations, transport equation, and finite element modeling technique. Mathematical model was derived on the assumption that the induced porosity follows linear and parabolic solutions of Laplace equation and applied external load mimicking hypersonic conditions with critical heat flux ranging between 7 and 44 MW/m2. Simulations were carried out with four different UHTCs combinations and the results outlined a temperature rise exceeding 4700°C with deformation observed on the fixed area and where the heat flux was generated. The influence of porosity had a greater impact on the performance of the material as it led to a reduction in deformation compared to dense samples. Porous UHTCs exhibited a good thermal shock resistance owing to the release of thermal stresses through pores, which also enhanced the thermal insulation of the structure.
| Original language | English |
|---|---|
| Article number | e10168 |
| Number of pages | 14 |
| Journal | International Journal of Ceramic Engineering & Science |
| Volume | 5 |
| Issue number | 1 |
| Early online date | 12 Nov 2022 |
| DOIs | |
| Publication status | Published - Jan 2023 |
Bibliographical note
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly citedKeywords
- finite element analysis
- heat flux
- hypersonic conditions
- mathematical modeling
- porosity
- thermal stress
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Biomaterials
- Materials Science (miscellaneous)