Abstract
The isothermal oxidation behavior of Cu- 38at.%Zn alloy over the temperature range of 773-1123 K was studied. Characterization of the oxidized specimens was conducted using X-ray diffraction (XRD) and scanning electron microscope (SEM). The results show that the oxidation kinetics of Cu-38at.%Zn alloy obeys parabolic law. The activation energy during oxidation of the alloy is calculated to be 176 kJ mol-1, based on the parabolic growth constant analyses. An external ZnO oxide scale, internal ZnO oxide and a Zn depletion zone on substrate formed after alloy oxidation are discussed. The scale spallation from the substrate is analyzed, based on the growth stresses and thermal stresses induced during oxidation.
Original language | English |
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Pages (from-to) | 267-272 |
Number of pages | 6 |
Journal | High Temperature Materials and Processes |
Volume | 30 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1 Jun 2011 |
Keywords
- Activation energy
- Cu-Zn alloy
- Oxidation
- X-ray diffraction
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Physical and Theoretical Chemistry