Ti-6Al-4V alloy is promising material as biomedical micro/nano electromechanical systems. However, its poor microtribological properties have a negative impact on the micromachine stability. In this study, enhancements in anticorrosion and microtribological performances under dry and SBF lubrication are realized by grafting graphene oxide (GO) on the alloy surface. We further demonstrate that based on a 3-aminopropyltriethoxysilane (APTES) transition layer, the GO-coated sample with dopamine (DA) adhesive layer (APTES-DA-GO) exhibits better properties than those of the APTES-GO. Moreover, the anticorrosion and tribological mechanisms of the GO-coated samples were discussed. Analyses of worn surfaces show that the relative slip of GO sheets and entrapment of wear particles of the surface topography are the main factors contributing to the improved tribological behaviour.
[1]Shanghai Jiao Tong Univ, Minist Educ, Key Lab Thin Film & Microfabricat Technol, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China.
[2]Qingdao Univ, Collage Text & Clothing, Inst Funct Text & Adv Mat, Qingdao 266000, Shandong, Peoples R China.
[3]Chinese Acad Sci, Shanghai Adv Res Inst, Lubricating Mat Lab, Shanghai 201210, Peoples R China.
[4]Shanghai Jiao Tong Univ, Shanghai Peoples Hosp 6, Dept Orthopaed, Shanghai 201400, Peoples R China.
[5]Wenzhou Med Univ, Dept Orthoped Surg, Affiliated Hosp 2, Wenzhou 325027, Peoples R China.
[6]Wenzhou Med Univ, Yuying Childrens Hosp, Wenzhou 325027, Peoples R China.
[7]South Campus Shanghai Sixth Peoples Hosp, Shanghai Fengxian Cent Hosp, Dept Orthopaed, Shanghai 201499, Peoples R China.
(8.0+极速模式)