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Interaction of Small Ceramic Particles with a Dendritic Solidification Front
Author(s) -
Lierfeld T.,
Kolbe M.,
Eggeler G.,
Herlach D. M.
Publication year - 2008
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200700357
Subject(s) - materials science , ceramic , front (military) , dendrite (mathematics) , convection , composite material , mechanics , meteorology , geometry , physics , mathematics
The interaction of ceramic particles with a dendritic solidification front was investigated by comparative solidification experiments in reduced gravity and under terrestrial conditions. Inductive melting of Ni 98 Ta 2 samples containing Ta 2 O 5 particles under gravity induces strong forced convection, which hinders the engulfment of particles in the dendrite stem. Comparative experiments in reduced gravity lead to a drastic decrease of forced convection. That enables the entrapment of Ta 2 O 5 particles during rapid propagation of Ni 98 Ta 2 dendrites.