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On characteristic eutectic free microstructural evolution in hypereutectic Al-Si processed through spark plasma sintering

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Abstract
Spark plasma sintering aids in characteristic eutectic structure free microstructural evolution in hypereutectic Al-Si. The mechanism of suppression of characteristic eutectic was elucidated through current-voltage evolution during sintering, electron backscatter diffraction phase mapping and high-angle annular dark field imaging. The electric current activated eutectic melting at the Al-Si interface followed by rapid heat transfer lead to a microstructural evolution under far from equilibrium condition and free from conventional eutectic structure.
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Current-voltage characteristics, High-angle annular dark field, Hypereutectic, Microstructure, Powder technology, Spark plasma sintering
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