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Ultrafine Co–30 wt.%NbC composite powder with a core/rim structure was synthesized via a direct reduction and carbonization process at 950 °C for 2 h under a vacuum condition. Results show that the particle size of the composite powder is about 150–200 nm. The size of a NbC core is about 110–140 nm and the thickness of its rim is 30 nm approximately. Comparative experiments and thermodynamic calculations...
A homogeneous, nanocomposite Ni/YSZ cermet powder was prepared by EDTA complexes-gel reduction process (CGRP). Zr-Y-Ni-O gel powder was formed from soluble complexes in aqueous solution. NiO/YSZ powder was obtained after the gel powder had been heat-treated in air for 2 h at 600 o C. Ni/YSZ powder was prepared by reducing the NiO/YSZ powder in hydrogen for 2 h at 850 o C. The X-ray...
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