Cold-Sprayed Magnesium Coatings Deposited with Helium and Air  

作　　者：M P Planche R Bolot C Coddet 

机构地区：[1]LERMPS,University of Technology of Belfort-Monbeliard,90010,Belfort cedex,France

出　　处：《稀有金属材料与工程》2012年第S1期61-63,共3页Rare Metal Materials and Engineering

摘　　要：Cold-sprayed magnesium coatings have been little researched although cold spraying has been applied to deposit a large number of materials such as metals,metal matrix composites.In the present study,helium gas and air were employed as the propelling gases to deposit Mg coatings under the temperature of 600℃and 630℃.The effect of gas types on the coating microstructure was investigated.It is much interesting to find that the particle deposition efficiency using helium gas as propelling gas is lower than that using air.This suggests that strong erosion occurred during cold spraying using helium gas.The porosity of the coating using helium gas is lower than that using air.In addition,the in-flight particle velocity was also simulated by the FLUENT software to explore the effect of gas types.The modeled results show that the in-flight particle velocity using helium is higher than the erosion velocity of Mg particle.Cold-sprayed magnesium coatings have been little researched although cold spraying has been applied to deposit a large number of materials such as metals,metal matrix composites.In the present study,helium gas and air were employed as the propelling gases to deposit Mg coatings under the temperature of 600℃and 630℃.The effect of gas types on the coating microstructure was investigated.It is much interesting to find that the particle deposition efficiency using helium gas as propelling gas is lower than that using air.This suggests that strong erosion occurred during cold spraying using helium gas.The porosity of the coating using helium gas is lower than that using air.In addition,the in-flight particle velocity was also simulated by the FLUENT software to explore the effect of gas types.The modeled results show that the in-flight particle velocity using helium is higher than the erosion velocity of Mg particle.

关 键 词：cold SPRAYING MAGNESIUM coating microstructure particle velocity electrochemical cell 

分 类 号：TG174.44[金属学及工艺—金属表面处理]