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Oxidation of Ag–Sn–Sb alloy powders
Author(s) -
Wu C. P.,
Yi D. Q.,
Goto S.,
Xu C. H.,
Weng W.,
Zhou J. M.,
Xu G. F.
Publication year - 2014
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201206542
Subject(s) - alloy , materials science , metallurgy , gravimetric analysis , internal oxidation , thermogravimetric analysis , thermal oxidation , chemical engineering , chemistry , oxide , organic chemistry , engineering
The oxidation behavior of Ag–5.08Sn–3.15Sb and Ag–6.84Sn–1.25Sb alloy powders was investigated in air at 800 °C. The thermal gravimetric analysis (TGA) results confirmed that the starting oxidation temperature of Ag–5.08Sn–3.15Sb and Ag–6.84Sn–1.25Sb alloy powders was 670 and 720 °C, respectively. The oxidation kinetic results suggested that the oxidation behavior of Ag–Sn–Sb alloy followed a parabolic rate and the oxidation rate of Ag–5.08Sn–3.15Sb alloy powders was 3.2 times larger than that of Ag–6.84Sn–1.25Sb alloy powders. XRD results indicated that the formed Sb 2 O 3 would react with the Ag matrix forming AgSbO 3 . SEM–EDS observations indicated that the formed oxides were primarily distributed on the grain boundaries and the formed AgSbO 3 particles nailed into the SnO 2 particles. In addition, the oxidation mechanism of Ag–Sn–Sb alloy powders and the effect of Sb on oxidation behavior of Ag–Sn alloy powders were also discussed.