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- Title
Characterization of Rapidly Solidified Nd-Al and Nd-Ag Eutectic Alloys in Drop Tube.
- Authors
Büyük, Uğur; Erol, Mustafa; Volkmann, Thomas; Herlach, Dieter M.
- Abstract
Nd-14.2 at%Al and Nd-20.0 at%Ag eutectic alloys were containerlessly solidified in an 8 m drop tube. The droplets were undercooled during the free fall in about 1 s under reduced gravity condition in He atmosphere. The cooling rates at the solidification temperature were computed as a function of droplet size by making use of heat balance calculations. They were ranging between 40 × 103 and 0.8 × 103 K s−1 for droplets in size range of 100-900 μm diameters. Nusselt, Reynolds, and Prandtl numbers of the droplets were calculated. Microstructures of the alloys were analyzed and eutectic spacings were determined. Microhardnesses of the droplets with different sizes were measured to reveal a dependence on the cooling rates with which the droplets are solidified.
- Subjects
RAPID solidification processing of metals; EUTECTIC alloys; DROPLET measurement; NEODYMIUM; SILVER; ALUMINUM
- Publication
Advanced Engineering Materials, 2015, Vol 17, Issue 3, p359
- ISSN
1438-1656
- Publication type
Article
- DOI
10.1002/adem.201400131