The influence of carbon on the microstructure and wear resistance of alumina
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2021-04-01 |
| Journal | Journal of the American Ceramic Society |
| Authors | Rachel Marder, Priyadarshini Ghosh, Ivar E. Reimanis, Wayne D. Kaplan |
| Institutions | Colorado School of Mines, Technion ā Israel Institute of Technology |
| Citations | 13 |
Abstract
Section titled āAbstractāAbstract The influence of carbon as a dopant on grain growth and wear resistance of polycrystalline alumina was evaluated. Carbon was introduced into alumina by sintering in a carbonārich environment (graphite furnace under flowing He), and/or by residual carbon from organic binders used during the green body consolidation process. Samples were sintered at 1600Ā°C for 2 h. Doping alumina with carbon resulted in a reduced grain size after sintering, correlated to soluteādrag, and graphite particleādrag for high concentrations of carbon (~3 wt.%). The material response to abrasive wear was quantified by measuring the sample area cut for a defined time using a diamond wafering saw, as a function of grain size and carbon content. Sintering alumina with carbon resulted in a significant increase in wear resistance, as a result of the reduced grain size.