Tribological Mechanism of Friction and Wear Reduction Using Oil-Based ZnO Nanofluid Applied on Brass

Tao, Chuanlin; Wang, Bingxu; Barber, Gary C.; Schall, J. David; Zou, Qian; Wang, Jing

doi:10.19044/esj.2019.v15n3p223

Cited by 2 publications

(1 citation statement)

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“…In the present research, the addition of OA only in PAO 4 base oil showed some benefits on the reduction of friction and wear. Similar results were also reported by Sophie et al [18] and Tao et al [19]. In addition, there were no significant differences in COF and wear rate in width and depth between 1 mass% and 3 mass%.…”

Section: Friction and Wear Losssupporting

confidence: 90%

Assessment of Tribological Properties of Oil-Based Flake WS<sub>2</sub>-Oleic Acid Lubricant on Steel-Brass Sliding Contact

et al. 2020

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The current research focused on the tribological properties of flake-like WS 2 particles dispersed into PAO 4 base oil with oleic acid as surfactant. Various concentrations of 0.2 mass%, 1 mass% and 3 mass% were applied in the preparation of WS 2 -OA lubricant. The wear tests were carried out using a ball-on-plate reciprocating sliding test configuration. It was found that the highest COF of 0.578 was obtained using PAO 4 base oil with significant fluctuations. The COF could be reduced to approximately 0.34 and stabilized after adding the OA. When introducing the WS 2 articles, the COF was around 0.158 under 0.2 mass%, 0.143 under 1 mass% and 0.145 under 3 mass%, and became almost constant after 4 min. In addition, the highest wear rate in width of 61.5 µm/m and in depth of 2.2 µm/m was found using PAO 4 base oil. The wear rate can be reduced to 51.6 µm/m in width (16.1%) and 0.9 µm/m (59.1%) in depth under 3 mass% OA. While using the WS 2 particles, the wear rate in width could be further reduced to 45.2 µm/m using 1 mass% but with slightly higher wear rate in depth than that of OA. Based on the analysis in SEM and EDX, the abrasive grooves became less after introducing the OA, some dark spots composed of carbon acted as tribo-films on the worn area. While using WS 2 particles, it could be found that WS 2 flakes were adhered on the surfaces to reduce the friction and wear.

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Section: Friction and Wear Losssupporting

confidence: 90%