What is it about?
The paper highlights study on metal-ceramic coatings, which are obtained by depositing molten powder blends (Ni-Cr-Si-B+TiC-NiMo or Ni-Cr-Si-B-Cr3C2-Ni) by a high-velocity high-temperature gas jet. More specifically, microstructure, phase composition and resistance of the coatings against erosion (i.e., against impact of solid particles) under different angles (30 and 90 degrees) at high temperature (650 degrees Celsius) are reported. The erosion resistance of the above-mentioned coatings is compared to other commonly used materials (martensitic steel Hardox 400, cemented carbide WC-15Co, stainless steel AISI 304).
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Why is it important?
The paper demonstrates that the high-velocity oxy-fuel sprayed Ni-Cr-Si-B+TiC-NiMo and Ni-Cr-Si-B-Cr3C2-Ni coatings have a higher resistance to high-temperature erosion than commonly used wear resistant materials Hardox 400 and WC-15Co, although they perform worse than relatively soft, but oxidation resistant stainless steel AISI 304. The paper also shows that the application of TiC-NiMo as a reinforcement in metal-ceramic coatings is more favourable.
Perspectives
This paper shows that ceramic-metal scrap may relatively easily be applied as a reinforcement in metal-matrix composite overlays, at least ones, prepared by thermal spraying.
Mr. Andrei G. Surzhenkov
Tallinn University of Technology
Read the Original
This page is a summary of: HIGH TEMPERATURE EROSION WEAR OF CERMET PARTICLES REINFORCED SELF-FLUXING ALLOY MATRIX HVOF SPRAYED COATINGS, Materials Science, September 2015, Publishing House Technologija,
DOI: 10.5755/j01.ms.21.3.7617.
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