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Abstract
A 25 μm thickness polyethylene terephthalate (PET) film was implanted with 120 keV ions of nitrogen, carbon, and titanium to doses of 1×10 14, 1×10 15, 5×10 15 and 1×10 16 ions cm −2, respectively. The structure of the implanted PET was characterized by X-ray photoelectron spectroscopy (XPS), and the friction and wear behaviours of both implanted and unimplanted PET were investigated using a one-way reciprocating friction tester against a steel ball. Results indicate that ion implantation at a dose of 1×10 15 ions cm −2 increased the friction coefficient, whereas the carbon ion implantation at a dose of 1×10 16 ions cm −2 decreased the friction coefficient. All the tests showed that ion implantation lowered the wear rate, other than carbon ion implantation at a dose of 1×10 16 ions cm −2. XPS analysis revealed the break of CO and CO bonds and the formation of CN bonds during the process of nitrogen and carbon ion implantation; however, titanium was not detected by XPS after the implantation.
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