Formation conditions of vortex-like intermixing interfaces in cold spray

Materials & Design

Jan Cizek¹  Mostafa Hassani²  Xiaotao Luo³  Jan Cupera⁴  Rocco Lupoi⁵  Richard Jenkins⁶  Yingchun Xie⁷  Shuo Yin⁸  Wenya Li⁸ 

[1] Corresponding author.;Institute of Materials Science and Engineering, Brno University of Technology, 616 69 Brno, Czech Republic;Institute of Materials Science and Engineering, Brno University of Technology, 616 69 Brno, Czech Republic;Institute of Plasma Physics of the Czech Academy of Sciences, 182 00 Prague, Czech Republic;National Engineering Laboratory for Modern Materials Surface Engineering Technology, The Key Lab of Guangdong for Modern Surface Engineering Technology, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510651, PR China;Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853, USA;State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, PR China;Trinity College Dublin, The University of Dublin, Department of Mechanical, Manufacturing and Biomedical Engineering, Parsons Building, Dublin 2, Ireland;

关键词: Cold spray (CS);    Materials mixing;    Bonding mechanism;    Additive manufacturing;    Coating;   

DOI  :  

来源: DOAJ

【 摘 要 】

Experimental investigation was conducted to explore the formation conditions and provide new insights into the formation mechanisms of the unexplained intermixing phenomenon observed at the substrate-coatings interface of cold sprayed materials. The results indicate that the formation of intermixing interface significantly depends on the extent of plastic deformation at the coating-substrate interface, with severe deformation creating favorable conditions for the intermixing interface. Two factors have been identified to be critical for inducing the severe interfacial plastic deformation: low deposition efficiency and material properties. During low deposition efficiency cold spraying, most of the accelerated particles rebound after impact while inducing accumulative plastic deformation and thus intermixing at the coating-substrate interface. Considering the material properties, the coating materials must have sufficiently high density to attain enough kinetic energy for creating substantial plastic deformation of the first coating layer and the substrate upon their impact. Also, the substrate materials cannot be too hard so that plastic deformation can be induced. Based on the experimental analyses, the hypothesis of the intermixing interface formation mechanism is proposed in this paper.

【 授权许可】

Unknown