| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5438448 | Ceramics International | 2017 | 5 Pages |
Abstract
Alumina-MWCNT composite was densified by microwave sintering. CNTs were coated with boehmite nanoparticles to enhance their distribution in composite samples. Calcination temperature of composite powder was determined by TGA analysis (5 °C/min). Samples containing 0 and 1vol%CNT were produced by cold isostatic pressing at 180 MPa. Microwave sintering (1520 °C for 45 min) was conducted under the flow of argon. Phase analysis of the calcined composite powder showed complete transformation of boehmite into gamma-alumina. The relative densities were 99.3% and 98.1% for monolithic alumina and composite, respectively. CNT addition improved the fracture toughness of alumina by ~37%. SEM images showed that microwave sintering was successful. Also, coating CNTs improved their distribution in the alumina matrix.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Hossein Ghobadi, Touradj Ebadzadeh, Zahra Sadeghian, Hadi Barzegar-Bafrooei, Ali Nemati,