Preparation of Ni-precipitated hBN powder by rotary chemical vapor deposition and its consolidation by spark plasma sintering

Ni nanoparticles were uniformly precipitated on hBN powder by rotary chemical vapor deposition (RCVD) using nickelocene (NiCp2) as a precursor. The average grain size and the content of Ni increased from 13.9 to 84.5 nm and 0.98 to 3.65 mass%, respectively, with increasing supply rate (Rs) of NiCp2 from 0 to 1.12 × 10−6 kg s−1. The Ni-precipitated hBN powder was consolidated by spark plasma sintering. The density of the hBN body increased with increasing Ni content and sintering temperature. The highest density was 97.3% at 2273 K.