Abstract：The Co-Cr-V composite powder for spraying was prepared by thermal decomposition method. The phase and element composition， average particle size and potential of the powder were measured. The relationship between the microstructure and pH value of the solution was also analyzed. The results show that both V and Cr atoms have entered the crystal lattice of Co metal matrix after thermal decomposition， and the Co-Cr-V substitutional solid solution structure is obtained. The composite powder particles prepared at different pH values all have spherical microstructure and agglomeration phenomenon. With the increase of pH value， the composite powder particles come into contact with each other and agglomerate into a large-sized block structure. When the solution pH value is low， Zeta potential and isoelectric point have large deviation， and the particles disperse well. With the increase of pH value， the powder particles agglomerate obviously， and the average particle size increases.
2018, Vol. 28 
