Abstract
The microstructure and mechanical properties of two-dimensional (2D) C/C, C/C-SiC composites with randomly chopped carbon fibers, and three dimensional (3D) non-woven C/C composites subjected to different friction experiments were investigated. The microstructure was characterized using polarized light microscopy (PLM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Different texture degrees of pyrolitic carbon matrices were determined utilizing the polarized light measurement technique and measuring the orientation (opening) angle (OA) of the carbon (002) electron diffraction arcs. The local properties (hardness, elastic modulus, and stiffness) of individual structural components of C/C composites were characterized using nanoindentation. Nanoindentation results showed that increasing the degree of texture of pyrocarbon leads to a decrease in elastic modulus and hardness. The level and stability of the coefficient of friction as detected in subscale aircraft dynamometer simulations is influenced by both the characteristics of the bulk of C/C composite. It is possible to optimize the wear rate as well as the frictional performance of C/C composites by controlling the microstructure and mechanical properties of individual components of C/C composites.
| Original language | English |
|---|---|
| Pages (from-to) | 127-138 |
| Number of pages | 12 |
| Journal | Ceramic Engineering and Science Proceedings |
| Volume | 26 |
| Issue number | 8 |
| State | Published - 2005 |
| Externally published | Yes |
| Event | 29th International Conference on Advanced Ceramics and Composites - Cocoa Beach, FL, United States Duration: Jan 23 2005 → Jan 28 2005 |