What is it about?

In this study, two erosion protection Metal Matrix Composite (MMC) coatings with WC particles were deposited by the plasma transferred arc (PTA) welding. One of the coatings with tungsten carbide WC in the NiBSi matrix (WC/NiBSi), and the second coating WC in NiCrBSi matrix (WC/NiCrBSi) was deposited by the flame spray process on the same substrate material S235JR steel.

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Why is it important?

The aim of the present research is to study the influence of the impact of high-velocity/high-energy erodent particles and their impact angles on the erosive wear resistance behavior of two MMC erosion protection coatings, obtained by PTA and FS processes on the same substrate material. Comparison of erosion test results of WC/NiBSi (PTA) and WC/NiCrBSi (FS) coatings clearly indicates the difference in erosion resistance due to different morphology of the matrix and carbides. Erosion mechanisms were analyzed on samples exposed to the highest particle velocity (109 m/s) and the lowest impact angle (20).


WC/NiBSi coating obtained by the PTA process shows superior hardness and erosion properties. The main reasons for such a behavior are the composition, morphology and the production process of WC dispersed as a reinforcing material in the metal matrix of MMC coatings, a significantly smaller porosity, and a much more ductile metal matrix of coatings deposited by the PTA process, which together contributes to the increase in the erosion resistance.

Professor Milos B. Djukic
University of Belgrade, Faculty of Mechanical Engineering

Read the Original

This page is a summary of: Microstructure and Wear Behavior of MMC Coatings Deposited by Plasma Transferred Arc Welding and Thermal Flame Spraying Processes, Transactions of the Indian Institute of Metals, October 2019, Springer Science + Business Media,
DOI: 10.1007/s12666-019-01831-9.
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