Tribological properties of biocompatible molybdenum selenide nanoparticles as water lubrication additives for ultra-high molecular weight polyethylene/304 stainless steel contact

2021 ◽  
pp. 125053
Author(s):  
Hailin Lu ◽  
Lu Chen ◽  
Qi Liu ◽  
Yihong Li ◽  
Li Gao
Keyword(s):  
Molecular Weight ◽  
Stainless Steel ◽  
High Molecular Weight ◽  
Tribological Properties ◽  
Water Lubrication ◽  
304 Stainless Steel ◽  
Molybdenum Selenide ◽  
Ultra High Molecular Weight

The influence of concave dimples on the metallic counterface on the wear of ultra-high molecular weight polyethylene

2011 ◽  
Vol 226 (6) ◽  
pp. 455-462 ◽  
Author(s):  
Xincong Zhou ◽  
Alison L Galvin ◽  
Zhongmin Jin ◽  
Xinping Yan ◽  
J Fisher
Keyword(s):  
Molecular Weight ◽  
Surface Roughness ◽  
Stainless Steel ◽  
High Molecular Weight ◽  
Smooth Surface ◽  
High Nitrogen ◽  
Acetabular Cup ◽  
Reference Case ◽  
High Nitrogen Stainless Steel ◽  
Ultra High Molecular Weight

The aims of this study were to investigate how the dimples on a metallic counterface affect the wear rate of ultra-high molecular weight polyethylene (UHMWPE) in a multi-directional reciprocating pin-on-plate machine. The plates were high nitrogen stainless steel, representing the femoral head material. The pins used in this study were of ultra-high molecular weight polyethylene GUR 1120, which represents the material used in an acetabular cup. Three different cases were investigated: a smooth surface without dimples as a reference case, a surface with medium dimples with an average valley of 2.3 µm and a surface with large dimples with an average valley of 5.9 µm. It was found that all the dimples investigated did not improve the lubrication, but instead increased the surface roughness; consequently, the wear of UHWMPE was slightly increased.

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