| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
High Temperature Corrosion and Degradation of Structural Materials
|
| Presentation Title |
Intermediate Temperature Oxidation of Melt Infiltrated SiC/BN/SiC CMCs |
| Author(s) |
Sarah Holles, Elizabeth Opila, Katie Detwiler |
| On-Site Speaker (Planned) |
Sarah Holles |
| Abstract Scope |
SiC ceramic matrix composites (CMCs) are of interest to replace nickel-base superalloys in aerospace applications due to their higher melting point and lower densities. SiC CMCs have a high maximum operating temperature of 1300 ºC, but due to thermal gradients many parts experience lower temperatures throughout flight. Oxidation of SiC CMCs is explored through thermogravimetric analysis (TGA) in a pure oxygen environment. Samples were tested at 1- and 50-hours at 600, 700, and 800ºC to explore the intermediate temperature region. TGA results showed a steep increase in weight change early in the 50-hour tests and a slower weight change later. As expected, increasing temperature increased weight change. SEM was used to investigate borosilicate glass formation on exposed CMC surfaces as a function of exposure and time. |