Abstract
ZrB 2/ZrC ceramic powders were fabricated by mechanical alloying (MA) of zirconium (Zr), amorphous boron (B) and graphite (C) powder blends prepared in the mole ratios of Zr/B/C: 1/1/1, 1/2/1, 1/1/2, 1/2/2 and 2/2/1. MA runs were carried out in a vibratory ball mill using hardened steel vial/balls. The effects of Zr/B/C mole ratios and milling duration on the formation and microstructure of ZrB 2/ZrC ceramic powders were examined. Gibbs free energy change-temperature relations of the reactions and moles of the products were interpreted by thermochemical software. Zr/B/C: 1/1/1, 1/2/1, 1/1/2 and 1/2/2 powder blends MA'd for 2 and 3h contain unreacted Zr and C, ZrB 2, ZrC and B 4C particles. Synthesis of ZrB 2/ZrC ceramic powders was completely accomplished after MA of Zr/B/C: 2/2/1 powder blend for 2h. ZrC and ZrB 2 particles were obtained ranging in size between 50 and 250nm in the presence of FeB contamination (<1wt.%).
| Original language | English |
|---|---|
| Pages (from-to) | 1447-1455 |
| Number of pages | 9 |
| Journal | Journal of the European Ceramic Society |
| Volume | 32 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Jun 2012 |
Funding
We would like to express our gratitude to State Planning Organization (DPT) for funding the projects entitled “Advanced Technologies in Engineering” with the project number 2001K120750 and “Development of Al–Cu Based Metal Matrix Composites via Powder Metallurgy Techniques” with the project number 90189 out of which the main infrastructure of the Particulate Materials Laboratories was founded. Further, we would like to express our appreciations to Aziz Genç for his help in TEM analyses.
| Funders | Funder number |
|---|---|
| Al–Cu Based Metal Matrix Composites via Powder Metallurgy Techniques | 90189 |
| DPT | 2001K120750 |
| Devlet Planlama Örgütü |
Keywords
- Borides
- Carbides
- Ceramic powders
- Mechanical alloying
- Solid state reaction