Investigating the micropitting and wear performance of copper oxide and tungsten carbide nanofluids under boundary lubrication
Investigating the micropitting and wear performance of copper oxide and tungsten carbide nanofluids under boundary lubrication
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DOI：
10.1016/j.wear.2019.03.007
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发表时间：
2019-06
期刊：
影响因子：
5
通讯作者：
Sougata Roy;Y. Jazaa;S. Sundararajan
中科院分区：
文献类型：
--
作者：
Sougata Roy;Y. Jazaa;S. Sundararajan
研究了氧化铜（CuO）和碳化钨（WC）纳米流体在边界润滑条件下对AISI 8620钢微点蚀和磨损行为的强化作用。纳米流体由聚α烯烃（PAO）中的1重量%纳米颗粒和1重量%油酸表面活性剂组成。滚动接触疲劳试验使用的微点蚀试验台（MPR）进行。与基础油相比，两种纳米流体都表现出增加的微点蚀寿命。在边界润滑条件下，碳化钨纳米流体比氧化铜纳米流体表现出更高的抗微点蚀和耐磨性能。表面分析表明，不同的机制，以抑制两种纳米流体的微点腐蚀和磨损。WC纳米流体形成摩擦膜，而CuO纳米流体倾向于用纳米颗粒填充表面裂纹。
The potential of copper oxide (CuO) and tungsten carbide (WC) nanofluids in enhancing micropitting and wear behavior of AISI 8620 steel under boundary lubrication conditions was investigated. The nanofluids consisted of 1% nanoparticles by weight and 1% by weight of oleic acid surfactant in Polyalphaolefin (PAO). Rolling contact fatigue tests were conducted using a micropitting test rig (MPR). Both the nanofluids exhibited increased micropitting life compared to the base oil. Tungsten carbide nanofluids showed significantly higher micropitting and wear resistance behavior than the CuO nanofluids under the boundary lubrication regime. Analysis of the surfaces showed different mechanisms to inhibit micropitting and wear for the two nanofluids. The WC nanofluid formed a tribofilm whereas the CuO nanofluids tended to fill surface cracks with the nanoparticles.