Influence of Pressure in the Nozzle Combustion Chamber on the Porosity and Hardness of WC - Co Coatings Created by HVOF Technology

Jaromír Moravec; Václav Kaška

doi:10.4028/www.scientific.net/MSF.818.74

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Influence of Pressure in the Nozzle Combustion Chamber on the Porosity and Hardness of WC - Co Coatings Created by HVOF Technology
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HomeMaterials Science ForumMaterials Science Forum Vol. 818Influence of Pressure in the Nozzle Combustion...

Influence of Pressure in the Nozzle Combustion Chamber on the Porosity and Hardness of WC - Co Coatings Created by HVOF Technology

Abstract:

Thermally sprayed coatings, together with the deposition, belong among the most important technology both in the section of renovation and creation of functional surfaces. With the help of this technology it is possible to considerably improve the working life of the individual functional parts or to improve the range of their service parameters. Thermally sprayed coatings offer great variability both in light of backup materials (steels, non-ferrous metals, plastics), and in light of functional surfaces (metal powders, carbidic mixtures or ceramics). This paper describes individual types of powders with a view to properties and application possibilities of powders on the basis of W carbides with utilization of HVOF technology including a description of such method. Moreover the paper describes destructive and non-destructive tests for thermally created coatings. The experimental part is focused on the influence of pressure in the HVOF nozzle combustion chamber on the porosity and hardness of thermally sprayed coating for W carbide powders with different percentages of Co.

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Periodical:

Materials Science Forum (Volume 818)

Pages:

74-77

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.818.74

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Online since:

May 2015

Authors:

Jaromír Moravec*, Václav Kaška

Keywords:

Functional Surface, HVOF Technology, Porosity, Thermally Sprayed Coatings

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References

[1] J. Zahalka, Study of chosen properties HP/HVOF thermally sprayed coatings. Dissertation thesis, Pilsen, (2012).

Google Scholar

[2] D.A. Stewart, et al., Abrasive wear behavior of conventional and nanocomposite HVOF sprayed WC-Co coatings, Wear 225-229 (1999) 789-798.

DOI: 10.1016/s0043-1648(99)00032-0

Google Scholar

[3] Y.C. Zhu, a kol., Tribological properties of nanostructured and conventional WC-Co coatings deposited by plasma spraying, Thin Solid Films 388 (2001) 277-282.

DOI: 10.1016/s0040-6090(01)00805-7

Google Scholar

[4] Technical Data Bulletin from Praxaair Surface Technologies, Inc. Printed version. Issue M10331.

Google Scholar

[5] O. Ambroz, J. Kaspar, Thermally sprayed coatings and their industrial utilization. SNTL, Prague, (1990).

Google Scholar

[6] Information on http: /www. astroalloys. com/pdf/Powder_Brochure. pdf.

Google Scholar