|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Dynamic Behavior of Materials VIII
||E-33: New Insights to the Bonding Mechanisms in Metal-ceramic Composite Cold Spray
||Rohan Chakrabarty, Jun Song
|On-Site Speaker (Planned)
During the cold spraying of composite coatings (ceramic and metal particles mixture) on metal substrates, ceramic particles may either get embedded in the substrate or may rebound from the substrate surface. In this study, the embedding phenomenon of ceramic particles and its consequences on the deposition behavior have been analyzed using finite element analysis. The mechanisms of bonding for ceramic on metallic substrates have been evaluated by considering the dynamic fragmentation of the ceramic particles. The results have been found in confidence with the experimental observations. Contrary to previous conclusions, prevalence of adiabatic shear instability is not necessary for bonding between ceramic particles and metal substrates. Also, higher substrate crater depth doesn’t always relate to a higher ceramic deposition. It is found that a synergistic correlation between the crater shape and crater depth is required for higher first layer deposition efficiencies in metal-ceramic composite cold spray.
||Planned: Supplemental Proceedings volume