Ceramic Nano-particle/Substrate Interface Bonding Formation Derived from Dynamic Mechanical Force at Room Temperature: HRTEM Examination

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• 作者：Hai-Long Yao (1)
  Guan-Jun Yang (1)
  Sheng-Qiang Fan (2)
  Cheng-Xin Li (1)
  Chang-Jiu Li (1)
  
  1. State Key Laboratory for Mechanical Behavior of Materials ; School of Materials Science and Engineering ; Xi鈥檃n Jiaotong University ; Xi鈥檃n ; 710049 ; China
  2. School of Chemistry & Molecular Biosciences ; The University of Queensland ; St Lucia ; QLD ; 4072 ; Australia
  
• 关键词：HRTEM ; interface ; pressure ; room temperature cold spraying ; titania
• 刊名：Journal of Thermal Spray Technology
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：24
• 期：4
• 页码：720-728
• 全文大小：2,136 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Surfaces and Interfaces and Thin Films
  Tribology, Corrosion and Coatings
  Materials Science
  Characterization and Evaluation Materials
  Operating Procedures and Materials Treatment
  Analytical Chemistry
  
• 出版者：Springer Boston
• ISSN：1544-1016

文摘

The bonding of TiO2 nano-particle/substrate is a critical factor influencing the performance of dye-sensitized solar cells. In order to reveal the bonding properties at TiO2 nano-particle/substrate interface, high-resolution transmission electron microscopy (HRTEM) analysis was adopted to TiO2 coatings prepared by three different approaches. In the HRTEM analysis, the effective bonding mode is allowed to distinguish from the false image overlapping. Results show that large areas of effective bonding between nano-TiO2 particles and the substrate surface formed in the room temperature cold sprayed coating and mechanically pressed coating, while only limited interface areas with the effective bonding were observed in the coating deposited by non-pressed method. These results confirm that both high impact pressure during the room temperature cold spraying and mechanical pressure contribute to the bonding formation at the particle/substrate interface.