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http://dx.doi.org/10.3365/KJMM.2011.49.9.692

Improvement of Surface Properties of CP-Titanium by Thermo-Chemical Treatment (TCT) Process  

Jeong, Hyeon-Gyeong (i-Cube center, Engineering and Research Institute, Gyeongsang National University)
Lee, Dong-Geun (Special Alloys Research Group, Korea Institute of Materials Science)
Yaskiv, O. (Physico-Chemical Institute)
Lee, Yong-Tai (Special Alloys Research Group, Korea Institute of Materials Science)
Hur, Bo-Young (i-Cube center, Engineering and Research Institute, Gyeongsang National University)
Publication Information
Korean Journal of Metals and Materials / v.49, no.9, 2011 , pp. 692-698 More about this Journal
Abstract
The thermo-chemical treatment (TCT) process was applied to achieve surface hardening of CP titanium. The following three different surface modification conditions were tested so that the best surface hardening process could be selected:(a) PVD, (b) TCT+PVD, and (c) TCT+Aging+PVD. These specimens were tested and analyzed in terms of surface roughness, wear, friction coefficient, and the gradient of hardening from the surface of the matrix. The three test conditions were all beneficial to improve the surface hardness of CP titanium. Moreover, the TCT treated specimens, that is, (b) and (c), showed significantly improved surface hardness and low friction coefficients through the thickness up to $100{\mu}m$. This is due to the functionally gradient hardened surface improvement by the diffused interstitial elements. The hardened surface also showed improvement in bonding between the PVD and TCT surface, and this leads to improvement in wear resistance. However, TCT after aging treatment did not show much improvement in surface properties compared to TCT only. For the best surface hardening on CP titanium, TCT+PVD has advantages in surface durability and economics.
Keywords
titanium; thermo-chemical treatment; oxy-nitriding; surface hardening;
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1 P. Budzynski, A.A. Youssef, and J. Sielanko, Wear. 261, 1271 (2006).   DOI   ScienceOn
2 J.R. Sobiecki, T. Wierzchon, and J. Rudnicki, Vacuum. 64, 41 (2002).
3 A. Shenhar, I. Gotman, E.Y. Gutmanas, and P. Ducheyne, Mater. Sci. Eng. A268, 40 (1999).
4 E. Leitao, C. SA, R.A. Silva, M.A. Barbosa, and H. Ali, Corrosion Science. 37, 1861 (1995).   DOI   ScienceOn
5 O.V. Akgun and O.T. Inal, J. Mater. Sci. 29, 1159 (1994).   DOI   ScienceOn
6 A.M. Omran, K.D. Woo, D.K. Kim, S.W. Kim, M.S. Moon, N.A. Barakat, and D.L. Zhang, Met. Mater. Int. 14, 321 (2008).   DOI   ScienceOn
7 C. W. Kim and K. H. Kim, J. Kor. Ceram. Soc. 34, 512 (1997).
8 K.H. Lee, C.H. Park, and J.J. Lee, J. Kor. Inst. Surf. Eng. 34, 125 (2001).
9 C.H. Baeg, J.H. Hong, M.Y. Wey, G.-Y. Kim, and D.-B. Lee, J. Kor. Inst. Met. & Mater. 41, 473 (2003).
10 Y.-H. Hwang and C.-I. Lin, J. Che. Eng. Jpn 31, 214 (1998).   DOI   ScienceOn
11 K.S. Son, S.H. Lee, D.K. Lee, J.W. Lim, H.C. Lee, and J.J. Lee, J. Kor. Inst. Surf. Eng. 34, 105 (2001).
12 D.-B. Lee and S.-K. Kim, Kor. J. Met. Mater. 13, 469 (2007).
13 I. Pohrelyuk, O. Yaskiv, O. Tkachuk, and Dong Bok Lee, Met. Mater. Int. 15, 949 (2009).   DOI   ScienceOn
14 Y.-G. Park, T.-S. Kim, T.-G. Jhee, and M.-Y. Wey, J. Mater. Res. 12, 341 (2002).
15 Y.-G. Park and M.-Y. Wey, J. Kor. Inst. Met. & Mater. 42, 274 (2004).
16 C.S. Byun, N.H. Oh, Y.B. An, Y.W. Cho, C.M. Lee, and W.H. Lee, J. Mater. Res. 16, 168 (2006).
17 M.-Y. Wee, Y.-G. Park, and T.-S. Kim, Materials Letters. 59, 876 (2005).   DOI   ScienceOn
18 K. Kawata, H. Sugimura, and O. Takai, Thin Solid Films. 390, 64 (2001).   DOI   ScienceOn
19 S. Gokul Lakshmi, D. Arivuoli, and B. Ganguli, Mater. Chem. Phys. 76, 187 (2002).   DOI   ScienceOn