Fabrication of hydrophobic Ti3SiC2 surface with micro-grooved structures by wire electrical discharge machining. Issue 15 (15th October 2018)

• Record Type: Journal Article
• Authors: Zhou, Chaolan; Wu, Xiaoyu; Lu, Yanjun; Wu, Wen; Zhao, Hang; Li, Liejun
• Is Part Of: Ceramics international. Volume 44:Issue 15(2018)
• Page Start: 18227
• Page End: 18234
• Publication Date: 2018-10-15
• Subjects: Carbides -- Wettability -- Surfaces -- Wire electrical discharge machining; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.07.032
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The near-superhydrophobic Ti3 SiC2 surfaces with regular and controllable micro-grooved structures were fabricated by wire electrical discharge machining (WEDM). The surface topographies and chemical compositions of smooth and micro-grooved Ti3 SiC2 surfaces were characterized. The micro removal mechanism of Ti3 SiC2 in the process of electrical discharge machining was also analyzed. The wetting mechanism of micro-grooved Ti3 SiC2 surface was discussed along with the static contact angle, anisotropic wettability and contact angle evolution versus time. The relationships between parallel and perpendicular contact angles, depth-width ratio of micro-grooved structures and surface roughness of textured surface were investigated. The experimental results show that the parallel contact angle on the textured Ti3 SiC2 surface increased by about 164% compared with the one on the smooth surface, and near-superhydrophobic surface with obvious anisotropy was roughly achieved. The experimental parallel contact angles were very close to theoretical contact angles calculated by Cassie-Baxter formula. It is confirmed that the depth-width ratio may be used to predict the parallel contact angle with the average prediction error of 2.4%. The perpendicular contact angles had a good correlation with the depth-width ratio and surface roughness.