The dissection of atomic clusters with local structure in Ga-Sn alloy melts
Xiaolin Zhao,
Yanwen Bai,
XinXin Li,
Changchun Wang,
Yunfang Li,
Xiufang Bian
Affiliations
Xiaolin Zhao
School of Materials Science and Engineering, Linyi University, Linyi 276005, P.R. China
Yanwen Bai
Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Jingshi Road 17923, Jinan 250061, P.R. China
XinXin Li
Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Jingshi Road 17923, Jinan 250061, P.R. China
Changchun Wang
School of Materials Science and Engineering, Linyi University, Linyi 276005, P.R. China
Yunfang Li
School of Materials Science and Engineering, Linyi University, Linyi 276005, P.R. China
Xiufang Bian
Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Jingshi Road 17923, Jinan 250061, P.R. China
The statistic short-range order (SRO) structure parameters of the Ga-Sn alloy melt are obtained with the X-ray diffractometer. The local atomic and electronic structures around the absorption atoms of Ga and Sn elements are detected by X-ray absorption fine structure spectrum. Centered on the absorption atom, the atom cluster structure was dissected and the atom cluster model was established. Unlike the ordinary liquid metal structure, the local atomic structure demonstrates that the liquid Ga-Sn alloy is not characterized by a dominant icosahedral short-range order. Specially, Sn atoms aggregate in Ga91.6Sn8.4 alloy, giving rise to a phase separation that exhibits compositional disorder.
