The influence of alumina content in Cu-Al2O3 powder on the properties of cold spraying coatings

作者：Li Ming Feng, Chang Guan, Guosheng An, Wensheng Li, Jirong Chang, Goransky Gerog, Vaganov Viktor · 年份：2017 · DOI：10.2991/ifmca-16.2017.122 · 被引用次数：2 · 研究领域：Materials Engineering and Processing、Material Properties and Applications、High-Temperature Coating Behaviors

The cold gas dynamic spray was used to prepare the Al 2 O 3 -Cu alloys coating on Al, Cu and steel substrate in this study with the mixture of pure Al 2 O 3 powder and pure copper powder. The influence rule of coating performance for different ratios was analyzed. The results showed that at a relatively high substrate hardness, different ratios is less effective to bond strength and vice versa. Al 2 O 3 -Cu coating on Al substrate can get largest thickness when the mixed-powder include 10% Al 2 O 3. Al 2 O 3 -Cu coating on Cu substrate can get largest thickness when the mixed-powder include 15% Al 2 O 3. Al 2 O 3 -Cu coating on steel substrate can get largest thickness when the mixed-powder include 25% Al 2 O 3. Al 2 O 3 -Cu coating on Al substrate can get maximum bond strength when the mixed-powder include 10% Al 2 O 3. Al 2 O 3 -Cu coating on Cu substrate can get maximum bond strength when the mixed-powder include 20% Al 2 O 3. Al 2 O 3 -Cu coating on steel substrate can get maximum bond strength when the mixed-powder include 25% Al 2 O 3. The thicker the coating thickness, the lower the bond strength.