Flora Somidin
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Preferred name
Flora Somidin
Official Name
Flora, Somidin
Alternative Name
Somidin, F.
Somidin, Flora
Main Affiliation
Scopus Author ID
54973802500
Researcher ID
GPF-4634-2022

Research Output
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  • Publication
    Imaging the polymorphic transformation in a single Cu6Sn5 grain in a solder joint
    ( 2018)
    Flora Somidin
    ;
    Hiroshi Maeno
    ;
    Xuan Tran
    ;
    Stuart D. McDonald
    ;
    Syo Matsumura
    ;
    Kazuhiro Nogita
    ;
    Mohd Arif Anuar Mohd Salleh
    In-situ observations of the polymorphic transformation in a single targeted Cu6Sn5 grain constrained between Sn-0.7 wt % Cu solder and Cu-Cu3Sn phases and the associated structural evolution during a solid-state thermal cycle were achieved via a high-voltage transmission electron microscope (HV-TEM) technique. Here, we show that the monoclinic η′-Cu6Sn5 superlattice reflections appear in the hexagonal η-Cu6Sn5 diffraction pattern upon cooling to isothermal 140 °C from 210 °C. The in-situ real space imaging shows that the η′-Cu6Sn5 contrast pattern is initiated at the grain boundary. This method demonstrates a new approach for further understanding the polymorphic transformation behavior on a real solder joint.
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