A Comparison between Hardness, Corrosion and Wear Performance of APS Sprayed WC-CoMo and WC-Co Coatings

Abstract:

Article Preview

In order to be competitive, it is demanded to have thin, tough and long lasting coatings. An important aspect is to use stable deposition technologies. As Cr assures wear, corrosion and high temperature resistance, the most employed coatings in industry generally contain Cr. Nevertheless, Cr is a hazardous element for the humans’ health, therefore, sustainable alternatives are needed to be implemented. The aim of this work is to investigate the microstructure, hardness, corrosion resistance and wear behavior of the novel WC-CoMo compared to conventional WC-Co coatings. So far, WC-CoMo coatings are not part of state of the art regarding the Atmospheric Plasma Sprayed (APS) coatings. WC-Co powder in plain form and mechanically mixed with Mo was deposited using the APS method on standardized Type A Almen Strips (C67 steel). The size of the powder grains varies between 5 µm and 30 µm. The obtained samples were investigated by means of Scanning Electron Microscopy, Energy Dispersive X-Ray Spectroscopy, X-Ray Diffraction, and hardness, wear and corrosion behavior were also evaluated. Results revealed formation of different intermetallic phases around the WC particles, which have a benefic influence on the coating characteristics and microstructure.

Info:

Periodical:

Solid State Phenomena (Volume 254)

Edited by:

Mircea Nicoară, Ion Dragoş Uţu, Carmen Opriș

Pages:

71-76

DOI:

10.4028/www.scientific.net/SSP.254.71

Citation:

N. Kazamer et al., "A Comparison between Hardness, Corrosion and Wear Performance of APS Sprayed WC-CoMo and WC-Co Coatings", Solid State Phenomena, Vol. 254, pp. 71-76, 2016

Online since:

August 2016

Export:

Price:

$38.00

* - Corresponding Author

[1] Tucker R.C., ASM Handbook: Thermal Spray Technology, vol. 5A, ASM International, (2013).

[2] P.L. Fauchais, Heberlein J.V.R., Boulos M., Thermal Spray Fundamentals. From Powder to Part, Springer Verlag, (2014).

[3] L. Pawlowski, The Science and Engineering of Thermal Spray Coatings, second ed., John Wiley & Sons, Chicester, (2008).

[4] Stachiowiak G.B., Stachowiak G.W., Tribological characteristics of WC-based claddings using a ball-cratering method, International Journal of Refractory Metals and Hard Materials 28 (2010) 95-105.

DOI: 10.1016/j.ijrmhm.2009.07.015

[5] Kurlov A.S., Rempel A.A., Effect of cobalt powder morphology on the properties of WC-Co hard alloys, Neorganicheskie Materialy 49 (2013), 956-960.

DOI: 10.1134/s0020168513080086

[6] Ismail A., Aziz Abd N., Corrosion Behaviour of WC-Co and WC-Ni in 3. 5% NaCl at Increasing Temperature, Trans Tech Publications, Applied Mechanics and Materials 660 (2014), pp.135-139.

DOI: 10.4028/www.scientific.net/amm.660.135

[7] Suetin D.V., Shein I.R., Ivanovskii A.L., Structural electronic and magnetic properties of η carbides (Fe3W3C, Fe6W6C, Co3W3C and Co6W6C) from first principles calculations (2009), Cornell University Library.

DOI: 10.1016/j.physb.2009.05.051

[8] Basak A.K., Achanta S., Matteazi P., Vardavoulias M., Celis J. -P., DeBonte M., Effect of Al and Cr addition on tribological behavior of HVOF and APS nanostructured WC-Co coatings, Transactions of The Institute of Metal Finishing 85 (2007).

DOI: 10.1179/174591907x229626

[9] Nolan D.J., Samandi M., Revealing true porosity in WC-Co thermal spray coatings, Journal of Thermal Spray Technology 6 (1997), pp.422-424.

DOI: 10.1007/s11666-997-0024-6

[10] Fauchais P., Vardelle A., Thermal sprayed coatings used against corrosion and corrosive wear, Advanced Plasma Spray Applications, Dr. Hamid Jazi (Ed. ), (2012).

DOI: 10.5772/34448

[11] Chivavibul P., Watanabe M., Kuroda S., Kawakita J., Komatsu M., Sato K, Kitamura J., Effect of Powder Characteristics on Properties of Warm-Sprayed WC-Co Coatings, Journal of Thermal Spray Technology 19 (2010), pp.81-88.

DOI: 10.1007/s11666-009-9438-7

In order to see related information, you need to Login.