| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Composite Materials for Nuclear Applications
|
| Presentation Title |
Novel Fiber Fretting Technique for Tribological Properties of Composite Interphases |
| Author(s) |
Joseph R. Kabel, Thomas E. J. Edwards, Caroline Hain, Tatiana Kochetkova, Johann Michler, Peter Hosemann |
| On-Site Speaker (Planned) |
Joseph R. Kabel |
| Abstract Scope |
Ceramic matrix composites exhibit excellent high temperature properties and are candidate materials for application as nuclear fuel cladding. The strength and deformation behavior of these composites are intrinsically tied to the properties of the fiber/matrix interphase. This research introduces a novel technique to evaluate the fundamental friction and wear characteristics of these interfaces. A case study on SiCf/PyC/SiCm composites applies in situ fiber fretting to investigate the kinetic friction coefficient (μk) and cyclic wear characteristics. Testing was carried out as a function of fiber type, PyC thickness (≈10, 500, 1200nm), cycle count (10, 100, 1000), and frequency (1, 5, and 10 Hz). The friction coefficient and behavior changed with cycle length as it related to transition from adhesive to abrasive friction mechanisms. SEM fractography provided insights to tribological evolution from adhesive sliding to three-body abrasive wear. The surface structural disorder contribution to adhesive resistance was investigated using Raman spectroscopy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Composites, Mechanical Properties, Thin Films and Interfaces |