Silane Treatment of Diamond-Like Carbon: Improvement of Hydrophobicity, Oleophobicity, and Humidity Tolerance of Friction

被引：2
作者：
Alazizi, Ala [1 ,2 ]
Smith, David [3 ]
Erdemir, Ali [4 ]
Kim, Seong H. [1 ,2 ]
机构：
[1] Penn State Univ, Dept Chem Engn, University Pk, PA 16802 USA
[2] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA
[3] SilcoTek Corp, Bellefonte, PA 16823 USA
[4] Argonne Natl Lab, Div Energy Syst, 9700 S Cass Ave, Argonne, IL 60439 USA
来源：
TRIBOLOGY LETTERS | 2016年 / 63卷 / 03期
基金：
美国国家科学基金会;
关键词：
Diamond-like carbon; DLC; Humidity tolerance; Silane treatment; TRIBOLOGICAL MOISTURE SENSITIVITY; RUN-IN BEHAVIOR; WATER-ADSORPTION; INTERNAL-STRESS; FILMS; WEAR; VAPOR; LUBRICATION; DLC; RESISTANCE;
D O I：
10.1007/s11249-016-0733-4
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Hydrophobicity and humidity tolerance of the low friction behavior of hydrogenated diamond-like carbon (H-DLC) were improved via surface modification using vapor-phase chemical reactions with organic silanes at 250-280 degrees C. Water and hexadecane contact angles increased after silane treatments. Unlike pristine H-DLC which loses ultra-low friction behavior as soon as relative humidity (RH) increases to a few percent, silane-treated H-DLC films maintained a low friction behavior (with a coefficient less than 0.08) up to 30 % RH. Elemental analysis of the transfer films accumulated on the balls after friction tests indicated that the silane molecules not only decorated the topmost surface of the H-DLC, but also penetrated into and reacted with the subsurface. Surface roughness, water adsorption behavior, and hardness measurements also showed that silane treatment affected the surface morphology and subsurface porosity of the H-DLC film.
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页数：11
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