Study on vaporization process of nickel powder particles inside direct current thermal plasma can provide theoretical guidelines for improving preparation process of nickel nanopowder.In this research,the effects of particle size,working gas flow rate and powder feeding...MORE Study on vaporization process of nickel powder particles inside direct current thermal plasma can provide theoretical guidelines for improving preparation process of nickel nanopowder.In this research,the effects of particle size,working gas flow rate and powder feeding rate on the motion behavior and heating process of ...