| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Biological Materials Science
|
| Presentation Title |
Micro-scratch of Irradiated Compression Molded Ultra High Molecular Weight Polyethylene (UHMWPE) based Nanocomposites |
| Author(s) |
Chinmayee Nayak, Ariharan S, Vamsi Krishna Bhalla, Kantesh Balani |
| On-Site Speaker (Planned) |
Chinmayee Nayak |
| Abstract Scope |
In present work, UV and gamma irradiation at 15 kGy and 25 kGy doses, respectively, were performed on as-processed ultra-high molecular weight polyethylene (UHMWPE) reinforced with alumina, hydroxyapatite and carbon nanotubes. The novelty of this work is to study the micro-scratch resistance and cytocompatibility of irradiated UHMWPE nanocomposites. Hardness (H) and reduced elastic modulus (Er) of irradiated nanocomposites are increased by ~1.5 times compared to that of as-processed UHMWPE (H: ~0.07 GPa and Er: ~1.25 GPa) due to crosslinking which diminishes the plastic deformation under load. During progressive scratch, hardening of hydroxyapatite, lubrication of CNT and enhanced hardness of irradiated nanocomposites contributed to up to 20% high coefficient of friction and nearly ~1.5-3 times lower wear rate than that of as-processed nanocomposites. The results establish irradiation as a positive factor of influence on tribological properties of as-processed UHMWPE nanocomposites. The irradiated samples are cytocompatible to L929 mouse fibroblast cells. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |