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1 Journal of Achievements in Materials and Manufacturing Engineering

1 2006

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Composite carbide powders and HVOF sprayed coatings with a plastic matrix

Formanek B., Szymański K., Beliayev A.

Journal of Achievements in Materials and Manufacturing Engineering

2006

Vol. 18, nr 1-2

351--354

Purpose: The paper presents the characterization of powders containing hard phases of chromium and titanium carbides in a plastic matrix, intended for thermal spraying of coatings. The synthesized powder composites containing chromium carbides, produced in high-temperature activated syntheses has been presented. Design/methodology/approach: Commercial materials, such as NiCr- CrxCy, are fabricated by means of technologies applied in powder metallurgy. The influence has been determined of the chemical composition and size analysis of original blends and synthesis processes on the products obtained. The powders NiCr-Cr3C2–TiC and FeCr- Cr 3C2-TiC are manufactured by self-activated high temperature synthesis. The synthesized powders were thermally sprayed by supersonic method in HVOF - Jet Kote II system. The structure and phase composition of the powders and coatings were determined by: scanning microscopy, X-ray phase analysis, energy dispersive X-ray analysis (EDX) and X-ray diffraction analysis. Findings: The structure and application of HVOF sprayed coatings containing chromium and titanium carbides has been presented. Practical implications: The HVOF thermally sprayed coatings are characterized high erosion- corrosion resistance of wear at elevated temperature. Originality/value: The paper presents the characterization of new type of NiCr-Cr 3C2 –TiC and FeCr- Cr3C2-TiC powders.