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Method and apparatus for supercooling and solidifying substances
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Katz, L. Robinson, M. B. Rathz, T. J. Lacy, L. L. |
| Copyright Year | 1983 |
| Description | An enclosure provides a containerless environment in which a sample specimen is positioned. The specimen is heated in the containerless environment, and the specimen melt is dropped through the tube in which it cools by radiation. The tube is alternatively backfilled with an inert gas whereby the specimen melt cools by both radiation and convection during its free fall. During the free fall, the sample is in a containerless, low-gravity environment which enhances supercooling in the sample and prevents sedimentation and thermal convection influences. The sample continues to supercool until nucleation occurs which is detected by silicon photovoltaic detectors. The sample solidifies after nucleation and becomes completely solid before entering the detachable catcher. The amount of supercooling of the specimen can be measured by knowing the cooling ratio and determining the time for nucleation to occur. |
| File Size | 648449 |
| Page Count | 7 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19830021379 |
| Archival Resource Key | ark:/13960/t6tx8595r |
| Language | English |
| Publisher Date | 1983-06-28 |
| Access Restriction | Open |
| Subject Keyword | Crystal Growth Convective Heat Transfer Microgravity Applications Nucleation Photometers Low Gravity Manufacturing Rare Gases Solidification Free Fall Containerless Melts Space Commercialization Vacuum Apparatus Supercooling Radiative Heat Transfer Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Patent |
