铝基陶瓷复合涂层表面粗糙度控制工艺研究

Study on Surface Roughness Control of Aluminum Based Ceramic Composite Coating

采用大功率电弧喷涂技术制备新型铝基陶瓷复合涂层,开展喷涂压力与涂层表面粗糙度对应关系研究.实验结果表明：喷涂压力与涂层表面粗糙度总体呈反比关系;当喷涂压力低于0.25MPa 后,涂层结合强度骤减,孔隙率增大;当喷涂压力在0.25 ～ 0.5MPa 时,涂层表面粗糙度与喷涂压力近似呈线性关系,可通过工艺控制量化定制涂层表面粗糙度;当喷涂压力大于0.5MPa 后,涂层表面粗糙度、结合强度与孔隙率逐渐趋于稳定.

A new type of aluminum based ceramic composite coating was prepared by high power arc spraying technology.Experimental results show that the spraying pressure and coating surface rough degree was generally an inverse relationship;When the spray pressure less than 0.25 MPa,the coating bonding strength reduce sharply,the porosity of coating increase;When the spray pressure in the 0.25~0.5MPa,coating surface roughness degree and spraying pressure with an approximate linear relationship,in this case,through process,we can control the coating surface roughness quantitatively;When the pressure more than 0.50 MPa,coating surface roughness and bonding strength and porosity tended to be stable.