Characterization of Rapidly Solidified Nd–Al and Nd–Ag Eutectic Alloys in Drop Tube
Source abstract
Abstract
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.
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Research context
OpenAlex topics: Metallic Glasses and Amorphous Alloys · Magnetic Properties of Alloys · Metallurgical and Alloy Processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Science Education Faculty of Education Erciyes University 38039 Kayseri Turkey
Department of Science Education Faculty of Education Bozok University 66200 Yozgat Turkey
Institut für Materialphysik im Weltraum Deutsches Zentrum für Luft‐und Raumfahrt (DLR) D‐51170 Köln Germany
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