Production and Characterization of Alumina-Diamond Composites and Nanocomposites
| Periodical | Advances in Science and Technology (Volume 65) |
|---|---|
| Main Theme | 12th INTERNATIONAL CERAMICS CONGRESS PART D |
| Edited by | Pietro VINCENZINI, Sheldon WIEDERHORN and Paolo COLOMBO |
| Pages | 16-20 |
| DOI | 10.4028/www.scientific.net/AST.65.16 |
| Citation | Eliria M.J. Agnolon Pallone et al., 2010, Advances in Science and Technology, 65, 16 |
| Online since | October, 2010 |
| Authors | Eliria M.J. Agnolon Pallone, Vania Trombini, Kátia L. Silva, Luis O. Bernardi, Makoto Yokoyama, Roberto Tomasi |
| Keywords | Alumina-Diamond, Composite, Nanocomposite |
| Price | US$ 28,- |
One of the most recent alternatives in the development of materials with high mechanical properties and wear resistance is the addition of nanometric and/or micrometric particles of a secondary phase into ceramic matrices. Nanostructured materials can be defined as systems that have at least one microstructural characteristic of nanometric dimensions (less than 100nm). In this work, alumina-diamond nanocomposites were produced using nanometric diamond powder obtained by high energy milling in a SPEX mixer mill for 6h. The crystallite size was 30nm. After deagglomeration, the diamond powder was added to the alumina matrix in a ratio of 5wt%. The samples were isostatically pressed and high-vacuum sintered. The resulting nanocomposites and composites were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and by microhardness, diametral compression and wear resistance tests. The results confirmed the promising wear characteristics of the alumina-diamond nanocomposite.
