| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Ceramic Matrix Composites
|
| Presentation Title |
Tribological Performance of HfB2-ZrB2 Based Ultra High Temperature Ceramics Consolidated via Spark Plasma Sintering |
| Author(s) |
Shruti Dubey, Kantesh Balani, Ambreen Nisar, Shikha Awasthi |
| On-Site Speaker (Planned) |
Shruti Dubey |
| Abstract Scope |
HfB2-ZrB2 based ultra-high temperature ceramics (UHTCs) are used as protecting tiles for leading edges and nose cones of aerospace and hypersonic vehicles to sustain harsh environmental conditions.In the present work, the effect of SiC (20 vol %) and CNTs (6 vol %) incorporation on the wear behaviour of these ceramics consolidated via spark plasma sintering (SPS) is studied. It has been observed that the wear rate reduced by almost > 90%, when CNT and SiC reinforced in HfB2-ZrB2 composites (for both fretting and scratch tests).The implementation of tribological models shows the effect of normal load on the wear of HfB2-ZrB2 based UHTC. Hertzian contact pressure (~15 GPa and ~21 GPa for fretting as well as scratch, respectively) and scratch hardness (~27 GPa to ~46 GPa) increased for CNT reinforced sample.Thus, CNT with SiC added composite endorsed improved tribological performance and can be established as a damage-tolerant material for aerospace applications. |