Abstract
A fast, low cost solution route to nickel dot coated NbC powder using Ni(NO3)26H2O, Ni(OAc)24H2O and triethanolamine (TEA) as precursors in methanol solvent was developed. After mixing the precursor solution with 50–300 nm sized NbC powder and evaporation of the solvent, heating to 150 °C, or higher, yielded NbC powder evenly covered with well-dispersed nickel metal dots, 6–25 nm in size, depending on the nickel loading and temperature. Coatings yielding 4 to 14 wt% nickel loading were studied at temperatures from 200 to 700 °C, using TG-DTA, XRD, SEM, XPS with Ar+-ion etching, TEM/DF, and STEM/HAADF/EDS.
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