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Open AccessArticle

An Investigation of the Wear on Silicon Surface at High Humidity

1
Center of Micro/Nano Science and Technology, Jiangsu University, Zhenjiang 212013, China
2
Tribology Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China
3
School of Mechanical Engineering, University of South China, Hengyang 421000, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(6), 1027; https://doi.org/10.3390/ma11061027
Received: 31 May 2018 / Revised: 12 June 2018 / Accepted: 14 June 2018 / Published: 16 June 2018
Using an atomic force microscope (AFM), the wear of monocrystalline silicon (covered by a native oxide layer) at high humidity was investigated. The experimental results indicated that tribochemistry played an important role in the wear of the silicon at different relative humidity levels (RH = 60%, 90%). Since the tribochemical reactions were facilitated at 60% RH, the wear of silicon was serious and the friction force was around 1.58 μN under the given conditions. However, the tribochemical reactions were restrained when the wear pair was conducted at high humidity. As a result, the wear of silicon was very slight and the friction force decreased to 0.85 μN at 90% RH. The slight wear of silicon at high humidity was characterized by etching tests. It was demonstrated that the silicon sample surface was partly damaged and the native oxide layer on silicon sample surface had not been totally removed during the wear process. These results may help us optimize the tribological design of dynamic microelectromechanical systems working in humid conditions. View Full-Text
Keywords: monocrystalline silicon; wear; high humidity; etch monocrystalline silicon; wear; high humidity; etch
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Wang, X.; Guo, J.; Xu, L.; Cheng, G.; Qian, L. An Investigation of the Wear on Silicon Surface at High Humidity. Materials 2018, 11, 1027.

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