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Ultimate intrinsic-coercivity samarium-cobalt magnet: an earth-based feasibility study for space-shuttle missions. [containerless melts
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Kumar, K. Das, D. K. Frost, R. T. Chang, C. W. |
| Copyright Year | 1980 |
| Description | Techniques for containerless melting and solidification of the samarium-cobalt alloy without excessive oxidation were developed. The rationale for extending these experiments in a weightless environment is also discussed. The effect of oxygen content from 0.15 to 0.63 weight percent and grain size in the range of 2 to 10 micrometers has been examined on arc-plasma-sprayed SmCo5 magnets. Contrary to expectations, the larger grain sizes tended to improve the coercivities. This was attributed to an increase in homogeneity resulting from higher temperature treatments used to produce larger grain size. No significant differences in coercivity were observed on the basis of oxygen content in the range examined. It is expected that more meaningful data on the relationship between oxygen content and coercivity will be seen when the oxygen content can be lowered to less than 0.1 weight percent. |
| File Size | 3858697 |
| Page Count | 41 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19800019883 |
| Archival Resource Key | ark:/13960/t6547ht9b |
| Language | English |
| Publisher Date | 1980-05-01 |
| Access Restriction | Open |
| Subject Keyword | Astronautics (general) Oxygen Samarium Compounds Metal Powder Coercivity Weightlessness Magnets Containerless Melts Granular Materials Space Commercialization Space Processing Comminution Plasma Spraying Cobalt Alloys 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 |
