Design of "double layer" texture to obtain superhydrophobic and high wear-resistant PTFE coatings on the surface of Al2O3/Ni layered ceramics

被引：44
作者：
Fan, Hengzhong [1 ]
Su, Yunfeng [1 ]
Song, Junjie [1 ]
Wan, Hongqi [1 ]
Hu, Litian [1 ]
Zhang, Yongsheng [1 ]
机构：
[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China
来源：
TRIBOLOGY INTERNATIONAL | 2019年 / 136卷
基金：
中国国家自然科学基金;
关键词：
Al2O3/Ni layered ceramics; Bonded PTFE coating; Double texture; Superhydrophobic and wear-resistant; COMPOSITION-LUBRICATION DESIGN; TRIBOLOGICAL PROPERTIES; MECHANICAL-PROPERTIES; LAMINATED COMPOSITES; MG ALLOY; BEHAVIORS; PERFORMANCE; FABRICATION; FRICTION;
D O I：
10.1016/j.triboint.2019.04.004
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Solid lubricating polytetrafluoroethylene (PTFE) coating was designed to have a "double layer" texture after being sprayed on the untextured and textured surface of Al2O3/Ni layered ceramics. Surface texture of PTFE coating with smaller diameter and higher density showed excellent superhydrophobicity. Laser caused defluorinated and enhanced hardness of the PTFE coating. Meanwhile, Solid lubricants embedded in micro-dimples of substrate surface act as "mechanical self-locking" roles, which increase the surface contact area and provided a secondary lubricating effect, thus significantly increase the wear life of the coatings. Contact angle and wear life of the optimized "double layer" texture PTFE coatings could reach 160 degrees and 1.6 x 10(4) s, which are about 2.0 and 5.0 times higher comparing to untextured smooth PTFE coatings surface, respectively.
引用
收藏
页码：455 / 461
页数：7
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