Abstract
Experimental study has been conducted to investigate the formation mechanism of transition metal-based boride nanoparticles using RF thermal plasmas. Ti-B and Al-B systems were selected as models for the investigation. In order to synthesize TiB2 and A1B]2, the premixed feed powders of the constituent metal and boron were injected into the thermal plasma in different compositions. High boron content was favorable to enhance TiB2 and A1BI2 yields in the final product due to the high boiling point of boron. The mechanism of nanoparticle formation was investigated by estimating the homogeneous nucleation rate.
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