Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1604531 | International Journal of Refractory Metals and Hard Materials | 2008 | 7 Pages |
Abstract
Osmium carbide has been synthesized by Kempter and Nadler 46 years ago. According to the authors, OsC crystallizes in WC-type structure and has a hardness equal to 2000 kg mm−2. Up to date, almost nothing is known about the physical properties of this carbide. We studied electronic, elastic, plastic and mechanical properties of this carbide using an approach based on the density-functional theory. We found that the work of the above mentioned authors is sound. The calculated lattice parameters are in good agreement with that given by Kempter and Nadler and a rough estimate also showed that the measured hardness is reasonable. However, we found that the hexagonal structure of osmium carbide is unstable.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
M. Zemzemi, M. Hebbache,