Abstract
Spherical particles of Ag-28.1Cu eutectic alloy with a wide range of diameters from 80 to 1000 μm were produced using a 3 m drop tube. It was revealed that a "lamellar eutectic → anomalous eutectic" transition occurred with decreasing drop diameter. The results of TMK model indicated that the maximum growth velocity, the minimum interlamellar spacing, and the largest undercooling of Ag-28.1Cu alloy for regular lamellar eutectic growth were 0.291 m/s, 0.017 μm and 193K respectively. A conspicuous grain refinement effect took place as droplet size decreased. The minimum measured eutectic interlamellar spacing was 0.092 μm, corresponding to a calculated eutectic growth velocity of 9.6 mm/s.
| Original language | English |
|---|---|
| Pages (from-to) | 824-830 |
| Number of pages | 7 |
| Journal | Jinshu Xuebao/Acta Metallurgica Sinica |
| Volume | 34 |
| Issue number | 8 |
| State | Published - Aug 1998 |
Keywords
- Ag-Cu alloy
- Drop tube
- Eutectic growth
- Microgravity
- Rapid solidification
- Undercooling and nucleation
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