Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/26972
Title: The effect of oxygen partial pressure on the growth of ZnO nanostructure on Cu0.62Zn0.38 brass during thermal oxidation
Authors: Xu, CH
Zhu, ZB
Lui, HF
Surya, C 
Shi, SQ 
Keywords: Brass
Nanostructures
Oxides
Oxygen partial pressure
Thermal oxidation
Photoluminescence
Issue Date: 2011
Publisher: Academic Press Ltd- Elsevier Science Ltd
Source: Superlattices and microstructures, 2011, v. 49, no. 4, p. 408-415 How to cite?
Journal: Superlattices and microstructures 
Abstract: Cu0.62Zn0.38 brass foils were thermally oxidized at 500 °C under various gaseous environments, including nitrogen, air and mixture of N2–O2 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 N2–O2 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.
URI: http://hdl.handle.net/10397/26972
ISSN: 0749-6036
DOI: 10.1016/j.spmi.2010.12.009
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