王桂贤,任书芳,周健松.Ti3SiC2在水、乙醇及其混合溶液中的摩擦学行为研究[J].表面技术,2017,46(8):128-133
Ti3SiC2在水、乙醇及其混合溶液中的摩擦学行为研究
Tribological Behaviour of Ti3SiC2 in Water, Ethanol and Their Mixtures
投稿时间:2017-02-22  修订日期:2017-08-20
DOI:10.16490/j.cnki.issn.1001-3660.2017.08.021
中文关键词:  Ti3SiC2  低黏度流体  边界润滑  晶粒拔出脱落  犁沟效应  摩擦学行为
英文关键词:Ti3SiC2  low-viscosity fluid  boundary lubrication  grain pullout and spalling  ploughing effect  tribological behavior
基金项目:国家自然科学基金青年基金项目(51405475)
作者单位
王桂贤 山西平阳重工机械有限责任公司,山西 侯马 043003 
任书芳 中科院兰州化学物理研究所,兰州 730000 
周健松 中科院兰州化学物理研究所,兰州 730000 
AuthorInstitution
WANG Gui-xian Shanxi Pingyang Industry Machinery Co., Ltd, Houma 043003, China 
REN Shu-fang Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China 
ZHOU Jian-song Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China 
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中文摘要:
      目的 考察新型可加工金属陶瓷材料Ti3SiC2在水基润滑系统(如水液压系统)及乙醇润滑系统(如乙醇燃料系统)中的摩擦学行为。方法 利用中频热压烧结技术制备Ti3SiC2样品,用球盘接触模式SRV-1摩擦磨损试验机考察Ti3SiC2/Si3N4摩擦副的摩擦学行为,利用扫描电子显微镜、X-射线光电子能谱、X-射线衍射谱等分析材料的形貌和成分物相。结果 Ti3SiC2/Si3N4摩擦副在乙醇中具有较低的摩擦系数(0.14)和磨损率(107 mm3/(Nm)),但在纯水中,其摩擦系数(0.54)和磨损率(104 mm3/(Nm))均较高。乙醇中少量的水(5%)即可使Ti3SiC2/Si3N4的摩擦学性能恶化,乙醇中Ti3SiC2磨损表面为轻微犁沟效应,随着乙醇中水含量的增大,Ti3SiC2晶粒拔出和脱落造成的坑洞增加,因此磨损率迅速增大。纯水中呈现大量的坑洞,相应的磨损率也达到最大值。结论 乙醇是Ti3SiC2/Si3N4摩擦副很好的低黏度流体润滑剂,在乙醇中,摩擦表面的高化学活性Si元素与乙醇发生了摩擦化学反应,生成的硅醇聚合物在摩擦接触界面形成了边界润滑,致使Ti3SiC2/Si3N4摩擦副在乙醇中具有优良的润滑和减磨作用。
英文摘要:
      Research on the tribological behavior of Ti3SiC2, a new type of machinable cermet material, in water-based lubrication systems (such as water hydraulic systems) and ethanol lubrication systems (eg, ethanol fuel systems). Ti3SiC2 sample was prepared by applying medium frequency hot-pressed sintering technology. Tribological behavior of Ti3SiC2/Si3N4 friction pair was explored with SRV-1 friction-abrasion testing machine in ball-on-disc mode. Surface morphology and composition phase were analyzed with scanning electron microscopy (SEM), X-ray photoelectron spectroscope (XPS) and X-ray diffraction spectrum. Ti3SiC2/Si3N4 had low coefficient of friction (0.14) and wear rate (107 mm3/(Nm)) in ethanol but high coefficient of friction (0.54) and wear rate (104 mm3/(Nm)) in pure water. The tribological properties of Ti3SiC2/Si3N4 could be degraded by a small amount of water (5 vol.%) in ethanol. Worn surface of Ti3SiC2 in ethanol was characterized by slight ploughing effect. As the water content in ethanol increased, pits caused by Ti3SiC2 grain pullout and spalling increased, and thereby wear rate increased rapidly. A large number of pits were present in pure water, and corresponding wear rate reached the maximum as well. Ethanol is a good low-viscosity fluid lubricant for Ti3SiC2/Si3N4 friction pair. Highly chemically active Si element on friction surface of ethanol has frictional chemical reaction with ethanol. The generated silanol polymer forms boundary lubrication on frictional contact interface. As a result, Ti3SiC2/Si3N4 friction pair has excellent lubrication and antifriction effect in the ethanol.
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