Polyethylene-CNT-hydroxyapatite coated materials

An article, comprising:

• a metallic substrate;
• and
• a coating directly contacting the metallic substrate, the coating comprising:
• a polymer matrix of at least 75 wt. % ultra high molecular weight polyethylene;
• from 0.5 to 4.75 wt. % of platelets of hydroxyapatite;
• and
• from 0.5 to 2.75 wt. % carbon nanotubes;
• wherein
• the platelets of hydroxyapatite and carbon nanotubes are uniformly dispersed in the polymer matrix,
• the metallic substrate comprises at least one metal selected from the group consisting of elemental titanium, gold, cobalt, tantalum, chromium, nickel, and stainless steel,
• a specific surface area of the carbon nanotubes is from 60 m2/g to 70 m2/g, and
• the coating has a thickness of between 60 and 1000 μm.