Metals, Volume 10, Issue 6 (June 2020) – 147 articles
Gas-atomized high-entropy alloyed spherical powders were consolidated by spark plasma sintering (SPS), and the SPS sample was plasma nitrided using an active screen. A uniform microstructure without segregation was obtained in the SPS sample. Analysis of the nitrided sample surface revealed that an expanded face-centered cubic phase formed on the surface plasma-nitrided at 673 K and that a CrN phase formed on the surface plasma-nitrided at >723 K. The surface hardness of the plasma-nitrided sample was ≥1200 HV, and the wear resistance and pitting corrosion resistance were improved compared with those of the SPS sample.
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