Abstract
The interconnected porosity of the Cr3C2–NiCr coatings obtained by high-velocity oxy fuel spraying is detrimental in corrosion and wear resistance applications. Laser treatments allow sealing of their surfaces through melting and resolidification of a thin superficial layer. A Nd:YAG laser beam was used to irradiate Cr3C2–NiCr coatings either in the continuous wave mode or at different repetition rates in the pulsed one. Results indicated that high peak and low mean laser irradiances are not good, since samples presented deep grooves and an extensive crack network. At low peak and higher mean laser irradiances the surface was molten, and only a few shallow cracks were observed. The interconnected porosity was completely eliminated in a layer up to 80 μm thick, formed by large Cr7C3 grains imbedded in a NiCr matrix.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
J. Li, Y. Zhang, J. Huang, and C. Ding, J. Therm. Spray Technol. 7, 242 (1998).
B. Wang, in Proceedings of the 11th International Conference on Surface Modification Technologies, edited by T. S. Sudarshan, M. Jeandin, and K.A. Khor (The Institute of Materials, London, United Kingdom, 1998), p. 458.
F. Otsubo, H. Era, T. Uchida, and K. Kishitake, J. Therm. Spray Technol. 9, 499 (2000).
J. He, M. Ice, and E. J. Lavernia, Metall. Mater. Trans. A 31, 555 (2000).
J. He and E. J. Lavernia, Mater. Sci. Eng. A 301, 69 (2001).
P. Serra, J. M. Miguel, J. L. Morenza, and J. M. Guilemany, in Laser Materials Processing, Vol. 89 (Laser Institute of America, Orlando, FL, 2000), p. 194.
S. C. Tjong, Thin Solid Films 274, 95 (1996).
J. Mateos, J. M. Cuetos, E. Fernaández, and R. Vijande, Wear 239, 274 (2000).
Y. Fu, A. W. Batchelor, H. Xing, and Y. Gu, Wear 210, 157 (1997).
G.Y. Liang and T. T. Wong, Surf. Coat. Technol. 89, 121 (1997).
H. C. Chen, E. Pfender, and J. Heberlein, Thin Solid Films 315, 159 (1998).
L. Pawlowski, J. Therm. Spray Technol. 8, 279 (1999).
S. Tondu, T. Schnick, L. Pawlowski, B. Vielage, S. Steinhäuser, and L. Sabatier, Surf. Coat. Technol. 123, 247 (2000).
K. A. Khor, A. Vreeling, Z. L. Dong, and P. Cheang, Mater. Sci. Eng. A 266, 1 (1999).
J.M. Guilemany and J. A. Calero, in Proceedings of the 11th In-ternational Conference on Surface Modification Technologies, edited by T. S. Sudarshan, M. Jeandin, and K.A. Khor (The Institute of Materials, London, United Kingdom, 1998), p. 81.
K. C. Chang, W. J. Wei, and C. Chen, Surf. Coat. Technol. 102, 197 (1998).
H. Wang, W. Xia, and Y. Jin, Wear 195, 47 (1996).
T. Nakanishi, 4th International Tribology Conference, Austrib’94 Frontiers in Tribology, Perth, Australia 5–8 Dec. 1994. (Society of Tribologists and Lubrication Engineers, Park Ridge, IL, 1994), pp. 761–766.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Serra, P., Miguel, J.M., Morenza, J.L. et al. Structural characterization of laser-treated Cr3C2–NiCr coatings. Journal of Materials Research 16, 3416–3422 (2001). https://doi.org/10.1557/JMR.2001.0470
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1557/JMR.2001.0470