Improvement of surface mechanical properties of polymers by helium ion implantation

Effect of nitrogen ion irradiation on the nano-tribological and surface mechanical properties of ultra-high molecular weight polyethylene

“…Recent literature reports many data about the wear improvement of UHMWPE by using ion bombardment treatments such as ion implantation [11][12][13][14][15][16] and plasma immersion ion implantation [17][18][19][20]. The modified layer, which depends on the ion type and fluence (ions/cm 2 ), reaches depth values ranging from a few nanometers to one micrometer [12,16,21,22]. Swift heavy ion beams (SHI) irradiation is an alternatively good candidate for surface modification of UHMWPE [23][24][25].…”

Modification in surface properties of poly-allyl-diglycol-carbonate (CR-39) implanted by Au+ions at different fluences

“…As a result, they are knocked out from their lattice sites, leaving vacancies there. When the displaced atoms collide with other target atoms along their trajectories, they cause collision cascade in the material which dominates the damage process [21]. TRIM simulation has been performed to analyze the damages produced in CR-39 after Au + ion implantation [20].…”

On the comparison of changes induced in crystallinity and surface nanomechanical properties of ultra high molecular weight polyethylene by γ and swift heavy ion irradiations

“…It has been shown that ion beam implantation and plasma-based ion implantation techniques resulted in improved wear resistance of UHMWPE [11][12][13][14][15][16][17][18]. In these techniques, ions are implanted into the polymer substrate with energies in the order of keV and fluences ranging from 10 14 to 10 17 ions/cm 2 .…”

“…In these techniques, ions are implanted into the polymer substrate with energies in the order of keV and fluences ranging from 10 14 to 10 17 ions/cm 2 . The thickness of the affected layer varies from a few nanometers to 1 μm, depending on ion type and energy [11,12]. In polyethylene, the physico-chemical changes associated with ion implantation are chain scission, cross-linking, formation of double and triple bonds, dehydrogenation of the surface layers and creation of carbonaceous aggregates especially at high fluences [19,20].…”