Friction and Wear of Pd-Rich Amorphous Alloy (Pd43Cu27Ni10P20) with Ionic Liquid (IL) as Lubricant at High Temperatures
Friction and Wear of Pd-Rich Amorphous Alloy (Pd43Cu27Ni10P20) with Ionic Liquid (IL) as Lubricant at High Temperatures
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DOI：
10.3390/met9111180
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发表时间：
2019-11
期刊：
影响因子：
2.9
通讯作者：
Jaeho Lee;Chang-Dong Yeo;Zhonglue Hu;Vidura D. Thalangamaarachchige;J. Kaur;E. Quitevis;G. Kumar;Yung P. Koh;S. Simon
中科院分区：
文献类型：
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作者：
Jaeho Lee;Chang-Dong Yeo;Zhonglue Hu;Vidura D. Thalangamaarachchige;J. Kaur;E. Quitevis;G. Kumar;Yung P. Koh;S. Simon
在离子液体(1-壬基-3-甲基咪唑双[（三氟甲烷）磺酰]酰胺（[C9C1im][NTf2]）作为润滑剂的条件下，采用球盘式往复摩擦计研究了富钯（Pd）非晶态合金（Pd43Cu27Ni10P20）与440C不锈钢在室温、100和200℃、3和7 mm/s滑动速度下的摩擦磨损行为，并与晶体Pd样品的摩擦磨损结果进行了比较。摩擦系数和磨损量受温度和滑动速度的影响。随着温度的升高，结晶Pd样品的COF显著增加，而非晶Pd合金样品的COF保持在较低水平。随着滑动速度的增加，两种Pd样品的COF均呈下降趋势。通过对三维表面轮廓仪和扫描电子显微镜（SEM）以及电子色散光谱（EDS）数据的分析，在结晶Pd表面观察到三种类型的磨损（即分层、粘着和磨粒磨损），而非晶Pd合金表面只产生磨粒磨损。此外，用x射线光电子能谱（XPS）测量研究了摩擦膜的形成。接触界面的化学反应活性随温度和滑动接触速度的增加而增加。当施加温度为200℃，滑动速度为7 mm/s时，离子液体具有良好的润滑效果。
The friction and wear behavior of palladium (Pd)-rich amorphous alloy (Pd43Cu27Ni10P20) against 440C stainless steel under ionic liquids as lubricants, i.e., 1-nonyl-3-methylimidazolium bis[(trifluoromethane)sulfonyl]amide ([C9C1im][NTf2]), were investigated using a ball-on-disc reciprocating tribometer at ambient, 100 and 200 °C with different sliding speeds of 3 and 7 mm/s, whose results were compared to those from crystalline Pd samples. The measured coefficient of friction (COF) and wear were affected by both temperature and sliding speed. The COF of crystalline Pd samples dramatically increased when the temperature increased, whereas the COF of the amorphous Pd alloy samples remained low. As the sliding speed increased, the COF of both Pd samples showed decreasing trends. From the analysis of a 3D surface profilometer and scanning electron microscopy (SEM) with electron dispersive spectroscopy (EDS) data, three types of wear (i.e., delamination, adhesive, and abrasive wear) were observed on the crystalline Pd surfaces, whereas the amorphous Pd alloy surfaces produced abrasive wear only. In addition, X-ray photoelectron spectroscopy (XPS) measurements were performed to study the formation of tribofilm. It was found that the chemical reactivity at the contacting interface increased with temperature and sliding contact speed. The ionic liquids (ILs) were effective as lubricants when the applied temperature and sliding speed were 200 °C and 7 mm/s, respectively.