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Anodizing-induced cracking in the preparation of TiO2 nanotube arrays
被引:3
作者:
Zhang, Wanggang
[1
]
Kang, Kai
[1
]
Wei, Aili
[1
]
Liu, Yiming
[1
]
Yang, Fuqian
[2
]
机构:
[1] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Shanxi, Peoples R China
[2] Univ Kentucky, Dept Chem & Mat Engn, Mat Program, Lexington, KY 40506 USA
来源:
MICRO AND NANOSTRUCTURES
|
2023年
/
181卷
基金:
中国国家自然科学基金;
关键词:
Anodization;
TiO 2 nanotube arrays;
Crack evolution;
Activation energy;
Nanomaterials;
STRESS-CORROSION;
GROWTH;
TEMPERATURE;
FILM;
D O I:
10.1016/j.micrna.2023.207626
中图分类号:
O469 [凝聚态物理学];
学科分类号:
070205 ;
摘要:
Understanding structural integrity of physical structures in chemical and electrochemical sys-tems/environments is of practical importance in analyzing and predicting the reliability and lifespan of the physical structures. In this work, we systematically investigate the crack growth in the TiO2 layers with TiO2 nanotube arrays during electrochemical anodization of Ti plates without external mechanical loading. There exists the combinational effects of the anodization voltage and the anodization temperature on the crack growth. A simple relationship between the growth rate of the areal crack density, the anodization temperature and the anodization voltage are proposed and supported by the experimental results. The growth rate of the areal density of the surface cracks increases with the increase of the anodization voltage and the anodization temperature. The nominal activation energy is a decreasing function of the anodization voltage, suggesting that increasing the anodization voltage promotes fast growth of the surface cracks in the TiO2 oxide layer.
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页数:9
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