Of Yg Department Of Carbide Surface Flame Deposition Of Composite Carbon Materials

In this paper, Combustion Flame was used to deposit compact composite carbon coatings onto cemented carbide surface for the first time. These coatings have been characterized wholly. The influence of pre-treatment and flame structure to the variations of phases and microstructure of the coatings have been investigated.In this study, all composite coatings were deposited by a flame system we established.The effect of flame structure on composite carbon coating had been investigated. After deposition, two distinct carbon coatings locating from inner to fringe respectively had been found on YG16 surface that had been lapped by using 240# diamond grinding disk before deposition, because the gradient variance of the temperature and atmosphere. In this study, both coatings had been characterized. It showed that both coatings were continuous and compact.When the condition include the following: cemented carbide which had been lapped and decobalted was chosen as substrate, R(C2H2/O2)=1, the distance between spray nozzle and cemented carbide surface was 5cm, the temperature of substrate surface was controlled at about 800癈, a continuous compact carbon nano-tube coating mixed with diamond and amorphous carbon was formed on the substrate. The adhesion between the coating and substrate seems pretty good.Then depositing diamond and DLC(diamond-like carbon) film onto cemented carbide which had been grinded and decobalted with a short deposition time was studied.In order to find out the influence of substrate statement and deposition time to the variations of composite carbon coating, several parameters including Co content of substrate, lap of substrate surface and deposition time have been investigated. The result showed that the increasing of Co content, deposition time would favor to the formation of carbon nano tube than diamond. And the trend of depositing carbon nano tube on lapped substrate was greater than origin substrate surface.