발간논문

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Vol.44, No.11, 759 ~ 764, 2006
Title
Fabrication of Wear-resistant Titanium Materials Consisting of Titanium and Titanium Nitrides by Nitrogen Ion Implantation
최병영 Byung Young Choi , 정중근 Joong Keun Jeong , 한승희 Seung Hee Han
Abstract
Penetration of nitrogen into commercial pure titanium by plasma immersion ion implantation has been carried out to develop wear resistant titanium materials in the present investigation. X-ray diffraction analysis indicates that the nitrogen implanted specimens consist of titanium nitrides and titanium phases. Nanoindentation hardness variations in the nitrogen implanted specimens as a function of depth from the surface are quite different from those in the unimplanted ones, showing significantly higher value of nanoindentation hardness in the near-surface of the nitrogen implanted ones. Profilometer measurements of wear track on the dry sliding wear tested specimens show that the wear resistance can be most improved by nitrogen implantation at anenergy of 30 keV to a dose of 6 × 10(17) N2+ ions/cm2 into commercial pure titanium in the present study. Higher value of nanoindentation hardness in the near-surface of the nitrogen implanted specimens to cause microploughing wear may be one of the main reasons for showing the most improvement of the wear resistance of the commercial pure titanium by plasma immersion ion implantation within the investigated ranges.
Key Words
wear-resistant titanium materials, nanoindentation hardness, microploughing wear
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