Effect of Plasma Gases on the Structure and Properties of WC-CrC-Ni Coatings

Abstract:

The effect of plasma gases (argon, helium) on the structure and properties of the WC-CrC-Ni coatings deposited at the graphite substrate has been investigated. The coatings were deposited by plasma spraying method in equipment Cham Pro –Thermal Spray Systems produced by Sulzer company. The microstructure of coatings were investigated by light microscopy (MO) and scanning electron microscopy (SEM). The performed investigations have been shown that with the increasing of amounts of argon and reducing volumes of helium and nitrogen, the microhardnees increased. The plasma gases also influenced on the porosity of coatings. Keywords: WC-CrC-Ni coatings, plasma spraying, microstructure, porosity Acknowledgement: The work was supported by project No INNOTECH – K2/IN2/9/181851/NCBR/13

• Periodical: Key Engineering Materials (Volume 641)
• Pages: 105-110
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.641.105
• Online since: April 2015
• Authors: Maria Richert*, Ilona Nejman, Marek Poręba, Jan Sieniawski, Łukasz Kuczek
• Keywords: Microstructure, Plasma Spraying, Porosity, Wc-CrC-Ni Coatings

References

[1] J. Mostaghimi, S. Chandra, Splat formation in plasma-spray coating process, Pure Appl. Chem. 74 (2004) 441 - 445.

DOI: 10.1351/pac200274030441

[2] O. Sarikaya, effect of some parameters on microstructure and hardness of alumina coatings prepared by the air plasma spraying process, Surface and Coatings Technology 190 (2005) 388-393.

DOI: 10.1016/j.surfcoat.2004.02.007

[3] M.H. Staiaa, T. Valenteb, C. Bartulib, D.B. Lewisc, C. P. Constablec, Part I: characterization of Cr3C2-25% NiCr reactive plasma sprayed coatings produced at different pressure, Surface and Coatings Technology 146 –147 (2001) 553 - 562.

DOI: 10.1016/s0257-8972(01)01437-2

[4] M. Richert, M. Książek, B. Leszczyńska – Madej, I. Nejman, R. Grzelka, P. Pałka, The Cr3C2 thermal spray coating on Al-Si substrate, Journal of Achievements in Materials and Manufacturing Engineering. 38 (2010) 95-102.

[5] Tsai-Shang Huang, Microstructure and properties of Thermal Sprayed WC-CrC-Ni Coatings, China Steel Technical Report. 24 (2011) 28-32.

[6] M. Richert, The wear resostamce of thermal spray the tungsten and chromium carbides coatings, Journal of Achievements in Materials and Manufacturing Engineering. 47 (2011) 177-183.

[7] W. Żórawski, S. Kozerski, Scuffing resistance of plasma and HVOF sprayed WC12Co and Cr3C2-25 (Ni20Cr) coatings, Surface and Coating Technology 202/18 (2008) 4453-4457.

DOI: 10.1016/j.surfcoat.2008.04.045

[8] S. Deshpande, A. Kulkarni, S. Sampath, H. Herman, Application of image analysis for characterization of porosity in thermal spray coatings and correlation with small angle neutron scattering, Sourface and Coatings technology 187 (2004) 6-16.

DOI: 10.1016/j.surfcoat.2004.01.032

[9] Surface Engineering for Corrosion and Wear Resistance, 2001 ASM International, Introduction to Surface Engineering for Corrosion and Wear Resistance /3, www. asminternational. org.

DOI: 10.31399/asm.tb.secwr.t68350001