Abstract
Changes in the macroscopic tribology of Ti + Ci ion-implanted steel depending on the supplemental carbon dose were studied. Titanium ions were implanted at 5 × 10 17 ions cm −2 followed by carbon ions at 0, 1 × 10 16, 4 × 10 16, 1 × 10 17 and 4 × 10 17 ions cm −2, into quenched and tempered steel. The coefficient of friction and amount of wear were evaluated through a reciprocating ball-on-disc wear test, at weight loads of 0.98 N, 1.96 N, 4.9 N and 9.8 N. The maximum weight load to accomplish the reduced friction coefficient increased with increase in the dose of supplemental carbon. Scanning electron microscopy observation of the wear tracks revealed that a decrease in wear was achieved when the coefficient of friction was kept at 0.2–0.3, and the morphology of the wear tracks appeared to be ploughing. The maximum depth of the wear tracks was kept below 0.1 μm when the type of wear was ploughing.
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