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Title:Thermal Properties of Indium Nanoparticles and Gold Silicide Formation by Scanning Nanocalorimetry
Author(s):Zhang, Ming
Doctoral Committee Chair(s):Allen, Leslie H.
Department / Program:Materials Science and Engineering
Discipline:Materials Science and Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Engineering, Materials Science
Abstract:The silicide study focuses on phase formation in Au-Si thin films. The unique finding is to determine the melting temperature of metastable phase using calorimetry, which is ∼60°C below the eutectic melting point (363°C). The heat of fusion (26.4 kJ/mol) of the metastable phase has also been obtained. The metastable phase is analyzed to be an orthorhombic structure (a = 0.92, b = 0.72, c = 1.35 nm) by double tilting experiment with stereographic projection method (ex-situ TEM). The composition is proposed to be Au3Si from EDAX. The real-time experiment shows the melting point depression of eutectic and competitive growth between eutectic and Au3Si phase. The composition of the film (i.e., gold-rich or silicon-rich) determines the formed phase. Rapid cooling experiments reveal that eutectic is supercooled down to much lower temperatures (∼135°C) than the Au3Si phase (∼275°C).
Issue Date:2003
Description:139 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2003.
Other Identifier(s):(MiAaPQ)AAI3102011
Date Available in IDEALS:2015-09-25
Date Deposited:2003

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