Abstract
Cu0.62Zn0.38 brass foils were thermally oxidized at 500 °C under various gaseous environments, including nitrogen, air and mixture of N2O2 at a pressure of 1 atm for 3 h. The oxidized specimens were characterized with a scanning electron microscope, an X-ray diffractometer and a transmission electron microscope. Optical property of oxidized products was characterized by photoluminescence. It is found that the nanowires and/or nanowalls are formed from hexagon ZnO crystals under N 2O2 gases and air. However, nanowires and nanowalls cannot form on the specimens oxidized in N2. When oxygen partial pressure of environment is over a critical value, increasing oxygen partial pressure is of disbenefit to the growth of nanowires and nanowalls and reduces the thickness of oxide scale on a specimen. The experimental results are explained by the defect equilibrium theory of oxide scale and the compressive growth stresses occurred during oxidation.
| Original language | English |
|---|---|
| Pages (from-to) | 408-415 |
| Number of pages | 8 |
| Journal | Superlattices and Microstructures |
| Volume | 49 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Apr 1 2011 |
| Externally published | Yes |
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Keywords
- Brass
- Nanostructures
- Oxides
- Oxygen partial pressure
- Photoluminescence
- Thermal oxidation
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Electrical and Electronic Engineering
Cite this
The effect of oxygen partial pressure on the growth of ZnO nanostructure on Cu0.62Zn0.38 brass during thermal oxidation. / Xu, C. H.; Zhu, Z. B.; Lui, H. F.; Surya, C.; Shi, S. Q.
In: Superlattices and Microstructures, Vol. 49, No. 4, 01.04.2011, p. 408-415.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The effect of oxygen partial pressure on the growth of ZnO nanostructure on Cu0.62Zn0.38 brass during thermal oxidation
AU - Xu, C. H.
AU - Zhu, Z. B.
AU - Lui, H. F.
AU - Surya, C.
AU - Shi, S. Q.
PY - 2011/4/1
Y1 - 2011/4/1
N2 - Cu0.62Zn0.38 brass foils were thermally oxidized at 500 °C under various gaseous environments, including nitrogen, air and mixture of N2O2 at a pressure of 1 atm for 3 h. The oxidized specimens were characterized with a scanning electron microscope, an X-ray diffractometer and a transmission electron microscope. Optical property of oxidized products was characterized by photoluminescence. It is found that the nanowires and/or nanowalls are formed from hexagon ZnO crystals under N 2O2 gases and air. However, nanowires and nanowalls cannot form on the specimens oxidized in N2. When oxygen partial pressure of environment is over a critical value, increasing oxygen partial pressure is of disbenefit to the growth of nanowires and nanowalls and reduces the thickness of oxide scale on a specimen. The experimental results are explained by the defect equilibrium theory of oxide scale and the compressive growth stresses occurred during oxidation.
AB - Cu0.62Zn0.38 brass foils were thermally oxidized at 500 °C under various gaseous environments, including nitrogen, air and mixture of N2O2 at a pressure of 1 atm for 3 h. The oxidized specimens were characterized with a scanning electron microscope, an X-ray diffractometer and a transmission electron microscope. Optical property of oxidized products was characterized by photoluminescence. It is found that the nanowires and/or nanowalls are formed from hexagon ZnO crystals under N 2O2 gases and air. However, nanowires and nanowalls cannot form on the specimens oxidized in N2. When oxygen partial pressure of environment is over a critical value, increasing oxygen partial pressure is of disbenefit to the growth of nanowires and nanowalls and reduces the thickness of oxide scale on a specimen. The experimental results are explained by the defect equilibrium theory of oxide scale and the compressive growth stresses occurred during oxidation.
KW - Brass
KW - Nanostructures
KW - Oxides
KW - Oxygen partial pressure
KW - Photoluminescence
KW - Thermal oxidation
UR - http://www.scopus.com/inward/record.url?scp=79953249099&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79953249099&partnerID=8YFLogxK
U2 - 10.1016/j.spmi.2010.12.009
DO - 10.1016/j.spmi.2010.12.009
M3 - Article
VL - 49
SP - 408
EP - 415
JO - Superlattices and Microstructures
JF - Superlattices and Microstructures
SN - 0749-6036
IS - 4
ER -