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Transformation of Mg2Si during TEM foil preparation
Affiliation:1. Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;2. Science and Technology on Advanced High Temperature Structural Materials Laboratory, BIAM, Beijing 100095, China;1. National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2. Mag (Kunshan) New Material Technology Co., Ltd., Kunshan 215300, China;1. Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, 314 Mailbox, Shenyang 110819, PR China;2. School of Sciences, Northeastern University, 314 Mailbox, Shenyang 110819, PR China;1. Department of Mechanical Engineering, Concordia University, 1455 de Maisonneuve Blvd West, Montreal, Quebec, Canada H3G 1M8;2. Department of Mechanical and Materials Engineering, Masdar Institute of Science and Technology, Masdar City, Abu Dhabi, United Arab Emirates;1. The Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang, 110819, China;2. The School of Materials Science and Engineering, Northeastern University, Shenyang, 110004, China
Abstract:Decomposition of Mg2Si particles was observed as foils of aluminum alloys were jet polished for transmission electron microscopy (TEM). Mg2Si in contact with a HNO3-methanol solution is converted to an amorphous SiO(H) phase. The amorphous phase remains as an artifact in the foil because the volume change associated with the transformation is small. Primary silicon particles were not altered during jet thinning.
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