Paljević, Matija; Tudja, Marijan
(1999)
Selective oxidation of zirconium in Zr2Cu.
Croatica Chemica Acta, 72
(2-3).
pp. 413-426.
ISSN 0011-1643
Abstract
The high-temperature oxidation of Zr2Cu in dry oxygen is characterized by selective oxidation of zirconium. The excess of copper is accumulated in the matrix alloy at the alloy-oxide interface forming the Zr8Cu5 phase. The oxide layer consists of monoclinic ZrO2 and a small amount of CuO. Additionally, tetragonal ZrO2 appears up to 873 K at the surface, and Cu2O is formed above 873 K, deeper in the oxide layer. The reaction kinetics obeys a parabolic rate law. An activation energy of 54.4 kJ/mol has been estimated in the temperature range 773-1123 K. An anomalous decrease of the oxidation rate occurs at 1155-1223 K, after a strong reaction at 1073-1150 K.
Item Type: |
Article
|
Uncontrolled Keywords: |
corrosion; oxidation; alloys; Zr2Cu; high temperature; selective; behavior; temperature; system; alloy |
Subjects: |
NATURAL SCIENCES > Chemistry |
Divisions: |
Division of Materials Chemistry |
Projects: |
Project title | Project leader | Project code | Project type |
---|
Intermetalni spojevi i metalni hidridi | Želimir Blažina | 00980906 | MZOS |
|
Depositing User: |
Matija Paljević
|
Date Deposited: |
26 Nov 2013 11:52 |
Last Modified: |
28 Feb 2014 13:10 |
URI: |
http://fulir.irb.hr/id/eprint/1126 |
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1126
WOS:000083263300023