Characterization of Niobium Carbonitride Coating on AISI D2 Steel


Article Preview

Thermo-diffusion coatings containing Nitrogen, Carbon and Niobium (N+C+Nb) on AISI D2 steel have been carried out by an initial tufftriding process followed by saturation with Niobium. The properties of the diffusion layer, namely microstructure, phase composition and micro-hardness of the Niobium carbonitride layer, have been studied. The influence of treatment time of Niobizing on the thickness of the metallized layer and its phase composition has been studied. Nitriding treatment was performed at 575°C for 2 h. Then, the Niobizing treatment was performed by pack method in the powder mixture consisting of ferro-Niobium, ammonium chloride and alumina at 1000°C for 1–4 h. The phases formed on the Niobium carbonitride coated steel were NbN and NbC, confirmed by X-ray diffraction (XRD) analysis. The longer the treatment times, the thicker the Niobium carbonitride layer became. The thickness of Niobium carbonitride layer was changing between 6.53 3m and 17.45 3m, depending on treatment time and temperature. The microhardness of Niobium carbonitride layer formed on the AISI D2 steel was changing between 2132±203 and 2814±245 HV0.01 from surface to interior.



Edited by:

Hasan Mandal




U. Şen and Ş. Şen, "Characterization of Niobium Carbonitride Coating on AISI D2 Steel ", Materials Science Forum, Vol. 554, pp. 213-217, 2007

Online since:

August 2007




[1] K. Holmberg, A. Matthews and D. Dowson, Editors: Coatings tribology, Tribology Series vol. 28, Elsevier, Amsterdam (1990), p.1.

[2] I. Ozbek and C. Bindal: Surface and Coating Technology 154 (2002), pp.14-20.

[3] C. Bindal and A.H. Ucisik: J. Aust. Ceram. Soc. 34 (1998), pp.287-292.

[4] U. Sen: Thin Solid Films 483 (1-2) (2005), pp.152-157.

[5] G. Morgan and M. H. Lewis: Journal of Material Science 9 (1974), pp.349-358.

[6] C. L. Yeh and Y. D. Chen: Ceramics International 31 (2005), pp.1031-1039.

[7] S. Motojima, T. Hamamoto and H. Iwanaga: Journal of Crystal Growth, 158 (1996), pp.79-83.

[8] T. Arai: TRD method, in Proceedings of the Japan International Tribology Conference, Nagoya (1990), p.1965-(1972).

[9] S. Barzilai, N. Frage and A. Raveh: Surface and Coating Technology 200 (2006), pp.4646-4653.

[10] Y. Komatsu, E. Sakuma, Y. Kimura, H. Ihara and S. Misawa: Journal of Crystal Growth 52 (1981), pp.597-601.

[11] Y. Komatsu, E. Sakuma, Y. Kimura, H. Ihara and S. Misawa: Journal of Less-Common Metals 75 (1980), pp.187-196.

[12] S. Motojimaa, W. In-Hwanga and X. Chenb: Materials Research Bulletin 35 (2000), pp.1517-1524.

[13] T. Arai: in ASM International Handbook Committee, (Eds. ), ASM Handbook, vol. 4, Heat treating, ASM International, Ohio, (1991), p.448.

[14] U. Sen: Materils and Design 26 (2005), pp.167-174.

[15] T. Arai, T. S. Sudarshan, D. G. Bhat and H. Hinderman: Development of carbide and nitride coatings by thermo-reactive deposition and diffusion Proceedings of Third International Surface Modification Technologies, Neuchatel, Switzerland, August 23-September 1 (1989).

[16] T. Arai: Development of carbide and nitride coatings by thermo-reactive deposition and diffusion, in Proceedings of the Third International Conference on Surface Modification Techniques III, Neuchatel, Switzerland (1989), pp.587-598.

[17] S. Sen: Vacuum 79 (2005), pp.63-70.

[18] U. Sen: Vacuum 75 (2004), pp.339-345.

[19] B. Podgornik, J. Vizintin, O. Wanstrand, M. Larsson and S. Hogmark: Surface and Coating Technology 177-178, (2004), pp.558-565.