Investigation on tribological performance of CuO vegetable-oil based nanofluids for grinding operations  

作　　者：Mirsadegh Seyedzavvar Hossein Abbasi Mehdi Kiyasatfar Reza Najati Ilkhchi 

机构地区：[1]Faculty of Engineering,Adana Alparslan TürkeşUniversity of Science and Technology,Adana,Turkey [2]Faculty of Mechanical Engineering,University of Tabriz,Tabriz,Iran [3]School of Science and Engineering,Khazar University,Baku,Azerbaijan

出　　处：《Advances in Manufacturing》2020年第3期344-360,共17页先进制造进展（英文版）

基　　金：The technical support of the Central laboratory of Tabriz University,Nano Technology Laboratory of Khazar University,and Material Science Laboratory of ATÜare also highly appreciated.

摘　　要：With ball-bearing and tribofilm lubrication effects,CuO vegetable oil-based nanofluids have exhibited excellent anti-wear and friction reduction properties.In this study,CuO nanofluids were synthesized by a one-step electro discharge process in distilled water containing polysorbate-20 and vegetable oil as a nanoparticle stabilizer and source of fatty-acid molecules in the base fluid,respectively.Pin-on-disk tribotests were conducted to evaluate the lubrication performance of synthesized CuO nanofluids between brass/steel contact pairs under various loadings.Surface grinding experiments under minimum lubrication conditions were also performed to evaluate the effectiveness of the synthesized nanofluids in improving the machining characteristics and surface quality of machined parts.The results of pin-on-disk tests revealed that adding nanofluids containing 0.5%and 1%(mass fraction)CuO nanoparticles to the base fluid reduced the wear rate by 66.7%and 71.2%,respectively,compared with pure lubricant.The lubricating action of 1%(mass fraction)CuO nanofluid reduced the ground surface roughness by up to 30%compared with grinding using lubricant without nano-additives.These effects were attributed to the formation of a lubrication film between the contact pairs,providing the rolling and healing functions of CuO nanoparticles to the sliding surfaces.The micrography of ground surfaces using a scanning electron microscope confirmed the tribological observations.

关 键 词：CuO nanofluids TRIBOLOGY LUBRICATION Wear Coefficient of friction Surface roughness 

分 类 号：TH117[机械工程—机械设计及理论]