Abstract
Internal oxidation of dilute silver alloys containing Al, Mg, Zn, Cu, and Sn was studied in air at temperatures between 573 K and 1173 K. Electrical resistivity, gravimetric, and gas-extraction measurements were made. The general trend of the resistivity is that it increases upon oxidation at lower temperatures and the resistivity decreases at higher temperatures in all of these alloys except Ag-Mg, in which it increases even at 1173 K. The increase in resistivity is considered to be related to the formation of clusters having excess oxygen. A detailed investigation was performed on Ag-Al alloys. The O/Al ratio in the clusters in Ag-2.2 at.% Al is much higher on oxidation at 773 K than for stoichiometric Al2O3 at 1173 K. The clusters release the excess oxygen on subsequent annealing at high temperatures, and decompose to stable Al2O3 at 1173 K.
| Original language | English |
|---|---|
| Pages (from-to) | 13-22 |
| Number of pages | 10 |
| Journal | Oxidation of Metals |
| Volume | 37 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - Feb 1992 |
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Keywords
- dilute silver alloys
- excess oxygen
- internal oxidation
- solute-element-oxygen clusters
ASJC Scopus subject areas
- Metals and Alloys
Cite this
Internal oxidation of dilute silver alloys. / Takada, Jun; Tomii, Yoichi; Yoshida, Nobuyuki; Sasaki, Masahiro; Koiwa, Masahiro.
In: Oxidation of Metals, Vol. 37, No. 1-2, 02.1992, p. 13-22.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Internal oxidation of dilute silver alloys
AU - Takada, Jun
AU - Tomii, Yoichi
AU - Yoshida, Nobuyuki
AU - Sasaki, Masahiro
AU - Koiwa, Masahiro
PY - 1992/2
Y1 - 1992/2
N2 - Internal oxidation of dilute silver alloys containing Al, Mg, Zn, Cu, and Sn was studied in air at temperatures between 573 K and 1173 K. Electrical resistivity, gravimetric, and gas-extraction measurements were made. The general trend of the resistivity is that it increases upon oxidation at lower temperatures and the resistivity decreases at higher temperatures in all of these alloys except Ag-Mg, in which it increases even at 1173 K. The increase in resistivity is considered to be related to the formation of clusters having excess oxygen. A detailed investigation was performed on Ag-Al alloys. The O/Al ratio in the clusters in Ag-2.2 at.% Al is much higher on oxidation at 773 K than for stoichiometric Al2O3 at 1173 K. The clusters release the excess oxygen on subsequent annealing at high temperatures, and decompose to stable Al2O3 at 1173 K.
AB - Internal oxidation of dilute silver alloys containing Al, Mg, Zn, Cu, and Sn was studied in air at temperatures between 573 K and 1173 K. Electrical resistivity, gravimetric, and gas-extraction measurements were made. The general trend of the resistivity is that it increases upon oxidation at lower temperatures and the resistivity decreases at higher temperatures in all of these alloys except Ag-Mg, in which it increases even at 1173 K. The increase in resistivity is considered to be related to the formation of clusters having excess oxygen. A detailed investigation was performed on Ag-Al alloys. The O/Al ratio in the clusters in Ag-2.2 at.% Al is much higher on oxidation at 773 K than for stoichiometric Al2O3 at 1173 K. The clusters release the excess oxygen on subsequent annealing at high temperatures, and decompose to stable Al2O3 at 1173 K.
KW - dilute silver alloys
KW - excess oxygen
KW - internal oxidation
KW - solute-element-oxygen clusters
UR - http://www.scopus.com/inward/record.url?scp=0026820085&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0026820085&partnerID=8YFLogxK
U2 - 10.1007/BF00665628
DO - 10.1007/BF00665628
M3 - Article
AN - SCOPUS:0026820085
VL - 37
SP - 13
EP - 22
JO - Oxidation of Metals
JF - Oxidation of Metals
SN - 0030-770X
IS - 1-2
ER -