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Microgravity silicon zoning investigation (Document No: 19850022760)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Gill Jr., G. L. Kern, E. L. |
| Copyright Year | 1985 |
| Description | The flow instabilities in floating zones of silicon were investigated and methods for investigation of these instabilities in microgravity were defined. Three principal tasks were involved: (1) characterization of the float zone in small diameter rods; (2) investigation of melt flow instabilities in circular melts in silicon disks; and (3) the development of a prototype of an apparatus that could be used in near term space experiments to investigate flow instabilities in a molten zone. It is shown that in a resistance heated zoner with 4 to 7 mm diameter silicon rods that the critical Marangoni number is about 1480 compared to a predicted value of 14 indicative that viable space experiments might be performed. The prototype float zone apparatus is built and specifications are prepared for a flight zoner should a decision be reached to proceed with a space flight experimental investigation. |
| File Size | 4157172 |
| Page Count | 104 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19850022760 |
| Archival Resource Key | ark:/13960/t48q0wq37 |
| Language | English |
| Publisher Date | 1985-05-15 |
| Access Restriction | Open |
| Subject Keyword | Astronautics (general) Crystal Growth Single Crystals Zone Melting Space Commercialization Melts Crystal Growth Float Zones Space Processing Flow Characteristics Silicon Low Gravity Manufacturing Microgravity Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
