Fabrication and drag reduction of the superoleophobic surface on a rotational gyroscope. (1st February 2018)

• Record Type: Journal Article
• Authors: Yin, Liang; Zhang, Haifeng; Weng, Rui; Wu, Zhiwen; Liu, Xiaowei
• Is Part Of: Surface engineering. Volume 34:Number 2(2018)
• Page Start: 165
• Page End: 171
• Publication Date: 2018-02-01
• Subjects: Microgyroscope -- superoleophobic surface -- wettability -- drag reduction; Surfaces (Technology) -- Periodicals; Coatings -- Periodicals; 620.4405
• DOI: 10.1080/02670844.2016.1275486
• Languages: English
• ISSNs: 0267-0844

Abstract

ABSTRACT: Surface tension and friction are dominant forces at microscale. The friction and wear of solid–solid or solid–liquid contacts affect the performance and lifetime of a microgyroscope. In this paper, we propose a novel superoleophobic liquid-bearing microgyroscope, and present a simple method to fabricate a superoleophobic surface on a 2J85 ferromagnetic alloy substrate through hydrofluoric acid etching. The superoleophobic surfaces exhibit reduced viscous drag because of the 'slip' associated with a layer of air trapped at the liquid/solid interface. In addition, a drag reduction ratio of approximately 10.7% was observed at a high velocity.