Loading...
Please wait, while we are loading the content...
Similar Documents
Convection and morphological stability during directional solidification
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Murray, Bruce T. Chernov, A. A. Coriell, Sam R. McFadden, G. B. |
| Copyright Year | 1994 |
| Description | For growth of a vicinal face at constant velocity, the effect of anisotropic interface kinetics on morphological stability is calculated for a binary alloy. The dependence of the interface kinetic coefficient on crystallographic orientation is based on the motion and density of steps. Anisotropic kinetics give rise to traveling waves along the crystal-melt interface, and can lead to a significant enhancement of morphological stability. The stability enhancement increases as the orientation approaches a singular orientation and as the solidification velocity increases. Shear flows interact with the traveling waves and, depending on the direction of the flow, may either stabilize or destabilize the interface. Specific calculations are carried out for germanium-silicon alloys. |
| File Size | 556343 |
| Page Count | 6 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19950008134 |
| Archival Resource Key | ark:/13960/t5fc00d68 |
| Language | English |
| Publisher Date | 1994-08-01 |
| Access Restriction | Open |
| Subject Keyword | Metallic Materials Phase Stability Materials Directional Solidification Crystals Shear Flow Traveling Waves Crystallography Convection Binary Alloys Silicon Alloys Germanium Alloys Interface Stability Anisotropy Melts Crystal Growth Morphology Destabilization Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
