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Nickel aluminate (NiAl2O4) spinel was formed using transferred arc plasma (TAP) melting in a single step processing. For the same, commercially available NiO and α-Al2O3 powders were mixed in 1∶1 molar weight ratio in a ball mill and then melted in a specially designed transferred arc plasma torch at different operating conditions. Argon gas was used to produce plasma at atmospheric pressure. XRD,...
Using an axial feed DC-plasmatron, mixtures of fine Ni and WC powder (1-3 μm) were plasma sprayed onto stainless steel substrates. A series of high-density Ni-WC coatings were produces with uniform distribution of WC particles. The small powder sizes coupled with the axial feed system resulted in high vaporization rates of the Ni and significant decomposition of the WC powders. The high vaporization...
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