Abstract
The effective elastic constants of single-crystal TiN/VNbN (001) superlattices have been determined using line-focus acoustic microscopy. Two independent procedures to determine the elastic constants of the superlattices are discussed. The first procedure consists of the following steps: measuring the anisotropic SAW dispersion data of single-crystal TiN and VNbN films deposited on MgO substrates, determining the elastic constants of the homogeneous TiN and VNbN films from the measured SAW dispersion data, calculating the effective elastic constants of the TiN/VNbN superlattices, and verifying the calculated elastic constants of the TiN/VNbN superlattices by comparing the corresponding calculated SAW dispersion curves with measured dispersion curves. In the second procedure the effective elastic constants of the TiN/VNbN superlattices are directly determined from the measured SAW dispersion data of the superlattices deposited on MgO substrates. The accuracy of each constant is estimated by considering the sensitivity of the dispersion curves to changes of each constant. The results of the two procedures are compared and advantages and disadvantages of each procedure are discussed. The elastic constants of superlattices do not exhibit a dependence on the superlattice period. It appears that there is no correlation between the hardness enhancement at a particular period and the elastic properties.
| Original language | English (US) |
|---|---|
| Title of host publication | Dynamic Characterization of Advanced Materials |
| Editors | Theodore M. Farabee, William L. Keith, Richard M. Lueptow |
| Publisher | Publ by ASME |
| Pages | 163-170 |
| Number of pages | 8 |
| Volume | 16 |
| ISBN (Print) | 0791810283 |
| State | Published - Dec 1 1993 |
| Event | Proceedings of the 1993 ASME Winter Annual Meeting - New Orleans, LA, USA Duration: Nov 28 1993 → Dec 3 1993 |
Other
| Other | Proceedings of the 1993 ASME Winter Annual Meeting |
|---|---|
| City | New Orleans, LA, USA |
| Period | 11/28/93 → 12/3/93 |
ASJC Scopus subject areas
- Mechanical Engineering
- Acoustics and Ultrasonics