Cold-Sprayed Al6061 Coatings: Online Spray Monitoring and Influence of Process Parameters on Coating Properties

被引：21
作者：
Koivuluoto, Heli [1 ]
Larjo, Jussi [2 ]
Marini, Danilo [3 ]
Pulci, Giovanni [3 ]
Marra, Francesco [3 ]
机构：
[1] Tampere Univ, Fac Engn & Nat Sci, Mat Sci & Environm Engn, Tampere 33100, Finland
[2] Oseir Ltd, Tampere 33720, Finland
[3] Sapienza Univ Rome, Dept Chem Engn Mat Environm, INSTM Reference Lab Engn Surface Treatment, I-00185 Rome, Italy
来源：
COATINGS | 2020年 / 10卷 / 04期
关键词：
cold spray; diagnostics; aluminum; Al6061; coatings; online monitoring; process parameters; PARTICLE-VELOCITY; MICROSTRUCTURE EVOLUTION; DEPOSITION; DIAGNOSTICS;
D O I：
10.3390/coatings10040348
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Process optimization and quality control are important issues in cold spraying and coating development. Because the cold spray processing is based on high kinetic energy by high particle velocities, online spray monitoring of particle inflight properties can be used as an assisting process tool. Particle velocities, their positions in the spray jet, and particle size measurements give valuable information about spraying conditions. This, in turn, improves reproducibility and reliability of coating production. This study focuses on cold spraying of Al6061 material and the connections between particle inflight properties and coating characteristics such as structures and mechanical properties. Furthermore, novel 2D velocity scan maps done with the HW CS2 online spray monitoring system are presented as an advantageous powder and spray condition controlling tool. Cold spray processing conditions were similar using different process parameters, confirmed with the online spray monitoring prior to coating production. Higher particle velocities led to higher particle deformation and thus, higher coating quality, denser structures, and improved adhesions. Also, deposition efficiency increased significantly by using higher particle velocities.
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页数：16
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