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On characteristic eutectic free microstructural evolution in hypereutectic Al-Si processed through spark plasma sintering
Date Issued
15-09-2020
Author(s)
Saravanan, T. T.
Indian Institute of Technology, Madras
Sharma, S. C.
Kumaran, S.
Chakravadhanula, V. S.K.
Ravikanth, K. V.
Vinoadh Kumar, K.
Sreemoolanadhan, H.
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.
Volume
275