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Infiltration of Cellular Silicon by Molten Magnesium Alloys
Author(s) -
Matz Alexander Martin,
Mocker Bettina Stefanie,
Heimann Johann,
Jost Norbert
Publication year - 2017
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.201700023
Subject(s) - materials science , intermetallic , microstructure , infiltration (hvac) , investment casting , magnesium , metallurgy , alloy , magnesium alloy , silicon , mold , composite material
Open‐pore cellular Si structures are manufactured by investment casting and, subsequently, infiltrated with molten Mg(‐Sn), representing the initial state for a formation of the intermetallic compound Mg 2 Si 1– x Sn x . The processing parameters which govern the evolution of microstructure after the infiltration process are studied in the alloy systems Mg‐Si and Mg‐Si‐Sn. The resulting microstructures are analyzed using SEM and EDS. It is found that an initial diffusion layer is already formed after infiltration. Its thickness can slightly be increased by raising the infiltration temperature of the Mg(‐Sn) melt. A variation in mold temperature does not show a noticeable impact. The comparison of the diffusion layer formed in the systems Mg‐Si and Mg‐Si‐Sn showed that a lower Sn content resulted in thicker layers.