@article{93528693c6f343f0b0f7240076061350,
title = "Imaging the polymorphic transformation in a single Cu6Sn5 grain in a solder joint",
abstract = "In-situ observations of the polymorphic transformation in a single targeted Cu6Sn5 grain constrained between Sn-0.7wt%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 themonoclinic 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.",
author = "Flora Somidin and Hiroshi Maeno and Tran, {Xuan Quy} and McDonald, {Stuart D.} and Salleh, {Mohd Arif Anuar Mohd} and Syo Matsumura and Kazuhiro Nogita",
note = "Funding Information: Supplementary Materials: The following are available online at http://www.mdpi.com/1996-1944/11/11/2229/ s1, Video S1: In-situ HV-TEM observations in real-space imaging of the hexagonal to monoclinic transformation Funding: The authors gratefully acknowledge the financial support from the University of Queensland-Nihon Superior (2016001895) collaborative research program. The HV-TEM operation was conducted on the Nanotechnology Platform Project for advanced nanostructure characterization (A-16-KU-0171) sponsored by MEXT. The research collaboration was promoted by the Progress 100 program of KU and “UQ-KU project” of UQ. Funding Information: This experiment was conducted under an international cooperative research program between the University of Queensland (UQ), Australia, Kyushu University (KU), and Nihon Superior Company Ltd., Japan. The authors acknowledge the facilities, and the scientific and technical assistance at the Centre for Microscopy and Microanalysis, UQ, and the Ultramicroscopy Research Center, KU. F. Somidin is financially supported by the Ministry of Education Malaysia and Universiti Malaysia Perlis (UniMAP). The authors gratefully acknowledge the financial support from the University of Queensland-Nihon Superior (2016001895) collaborative research program. The HV-TEM operation was conducted on the Nanotechnology Platform Project for advanced nanostructure characterization (A-16-KU-0171) sponsored by MEXT. The research collaboration was promoted by the Progress 100 program of KU and {"}UQ-KU project{"} of UQ Funding Information: Acknowledgments: This experiment was conducted under an international cooperative research program between the University of Queensland (UQ), Australia, Kyushu University (KU), and Nihon Superior Company Ltd., Japan. The authors acknowledge the facilities, and the scientific and technical assistance at the Centre for Microscopy and Microanalysis, UQ, and the Ultramicroscopy Research Center, KU. F. Somidin is financially supported by the Ministry of Education Malaysia and Universiti Malaysia Perlis (UniMAP). Publisher Copyright: {\textcopyright} 2018 by the authors.",
year = "2018",
month = nov,
day = "9",
doi = "10.3390/ma11112229",
language = "English",
volume = "11",
journal = "Materials",
issn = "1996-1944",
publisher = "MDPI AG",
number = "11",
}