title: Combined Effect of Textured Patterns and Graphene Flake Additives on Tribological Behavior under Boundary Lubrication.
abstract: A ball-on-plate wear test was employed to investigate the effectiveness of graphene (GP) nanoparticles dispersed in a synthetic-oil-based lubricant in reducing wear. The effect by area ratio of elliptically shaped dimple textures and elevated temperatures were also explored. Pure PAO4 based oil and a mixture of this oil with 0.01 wt% GP were compared as lubricants. At pit area ratio of 5%, GP-base oil effectively reduced friction and wear, especially at 60 and 100 °C. Under pure PAO4 oil lubrication, the untextured surfaces gained low friction coefficients (COFs) and wear rates under 60 and 100 °C. With increasing laser--texture area ratio, the COF and wear rate decreased at 25 and 150 °C but increased at 60 and 100 °C. Under the GP-based oil lubrication, the textured surface with 5% area ratio achieved the lowest COF among those of the area ratios tested at all test temperatures. Meanwhile, the textured surface with 20% area ratio obtained the highest COF among those of the area ratios. With the joint action of GP and texture, the textured surface with 10% area ratio exhibited the best anti-wear performance among all of the textured surfaces at all test temperatures.
authors.affiliation: Key Lab of Advanced Technologies of Materials (Ministry of Education), Tribology Research Institute, Southwest Jiaotong University, Chengdu, 610031, China.
authors.forename: Zhen-bing
authors.initials: ZB
authors.lastname: Cai
authors.affiliation: Key Lab of Advanced Technologies of Materials (Ministry of Education), Tribology Research Institute, Southwest Jiaotong University, Chengdu, 610031, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhao
authors.affiliation: Key Lab of Advanced Technologies of Materials (Ministry of Education), Tribology Research Institute, Southwest Jiaotong University, Chengdu, 610031, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Mechanical Engineering Department, School of Engineering and Technology, China University of Geosciences (Beijing), 100083, China.
authors.forename: Wen
authors.initials: W
authors.lastname: Yue
authors.affiliation: Key Lab of Advanced Technologies of Materials (Ministry of Education), Tribology Research Institute, Southwest Jiaotong University, Chengdu, 610031, China.
authors.forename: Min-hao
authors.initials: MH
authors.lastname: Zhu
mesh_terms: D017276:Friction; D006108:Graphite / Q000737:chemistry*; D006622:Hip Prosthesis; D006801:Humans; D054327:Lubricants / Q000737:chemistry*; D008153:Lubrication / Q000379:methods*; D008422:Materials Testing; D009821:Oils / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties
chemical_list: D054327:Lubricants; D009821:Oils; D006108:Graphite