With the development of polymer materials in recent years, their tribological properties have been investigated from the viewpoints of material properties (viscoelastic properties, hardness, roughness, etc), test conditions (atmosphere, humidity, specimen geometry, etc) and operating conditions (load, velocity, contact area, lubricating, etc). However their friction and wear characteristics have not been fully clarified because they are influenced by many factors. In the present paper, a tribological property of polyethylene has been investigated from a viewpoint of the effect of antioxidant and mating materials, i.e. eight kinds of metals and aluminum oxide.

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