Factors Affecting Adhesion in Metal/Ceramic Interfaces Created by Cold Spray

Increasingly, due to their interesting applications, research on metal/ceramic interfaces created by cold spray is being undertaken. Metal matrix composites and metal coatings on ceramic substrates are two examples with interesting applications for tribology and power electronics among many others. By the cold spray process, adhesion of particle to substrate or particle to particle is achieved by means of high-speed impact while remaining in the solid state. For metal/ceramic interfaces, where the ceramic is not expected to plastically deform, adhesion is poorly understood. Adhesion is considered to be the result of a combination of mechanical interlocking and physicochemical interactions occurring as a result of high-speed impact. The formation of physicochemical interactions and their contribution to adhesion remain of interest to create performant coatings with high adhesion. This review article provides an overview of the current state of knowledge regarding the deposition of metal on ceramic. This review includes a summary of the materials tested, the testing methodology and findings as well as an overview on the effect of deposition parameters on adhesion, the role of jetting in the interface and outlook regarding potential local changes occurring at the interface promoting adhesion.

Automated summary

Research on metal/ceramic interfaces created by cold spray is expanding due to their interesting applications, where adhesion of particles is achieved by high-speed impact while remaining in the solid state. The combination of mechanical interlocking and physicochemical interactions is considered crucial for adhesion, with the formation and contribution of physicochemical interactions remaining of interest.