The Lubricity of Gases

IF 2.9 3区 工程技术 Q2 ENGINEERING, CHEMICAL Tribology Letters Pub Date : 2024-08-28 DOI:10.1007/s11249-024-01911-y
Jie Zhang, Janet S. S. Wong, Hugh A. Spikes
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Abstract

A sealed reciprocating tribometer has been used to study the influence of different gaseous environments on the friction and wear properties of AISI52100 bearing steel at atmospheric pressure and 25 °C. Helium, argon, hydrogen, carbon dioxide and nitrogen all give high friction and wear, suggestive of very little, if any tribofilm formation under the conditions studied. Dry air and oxygen also give high friction, slightly lower than the inert gases, but produce extremely high wear, much higher than the inert gases. This is characteristic of the phenomenon of “oxidational wear”. The two gases ammonia and carbon monoxide give relatively low friction and wear, and XPS analysis indicates that this is due to the formation of adsorbed ammonia/nitride and carbonate films respectively. For the hydrocarbon gases studied, two factors appear to control friction and wear, degree of unsaturation and molecular weight. For the saturated hydrocarbons, methane and ethane give high friction and wear but propane and butane give low friction after a period of rubbing that decreases with molecular weight. The unsaturated hydrocarbons all give an immediate reduction in friction with correspondingly low wear. Raman analysis shows that all the hydrocarbons that reduce friction and wear form a carbonaceous tribofilm on the rubbed surfaces.

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气体的润滑性
使用密封的往复式摩擦磨损试验机研究了不同气体环境对 AISI52100 轴承钢在大气压力和 25 °C 下的摩擦和磨损特性的影响。氦气、氩气、氢气、二氧化碳和氮气都能产生较高的摩擦和磨损,表明在研究条件下几乎没有三膜形成。干燥空气和氧气的摩擦系数也很高,略低于惰性气体,但产生的磨损极高,远高于惰性气体。这是 "氧化磨损 "现象的特征。氨和一氧化碳这两种气体产生的摩擦和磨损相对较低,XPS 分析表明,这分别是由于形成了吸附氨/氮化物和碳酸盐薄膜。对于所研究的碳氢化合物气体,有两个因素似乎控制着摩擦和磨损,即不饱和程度和分子量。对于饱和碳氢化合物,甲烷和乙烷的摩擦和磨损程度较高,但丙烷和丁烷在摩擦一段时间后的摩擦程度较低,而摩擦程度随分子量的增加而降低。不饱和碳氢化合物都能立即降低摩擦力,相应地降低磨损。拉曼分析表明,所有减少摩擦和磨损的碳氢化合物都会在摩擦表面形成碳质三膜。
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来源期刊
Tribology Letters
Tribology Letters 工程技术-工程:化工
CiteScore
5.30
自引率
9.40%
发文量
116
审稿时长
2.5 months
期刊介绍: Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.
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