Control of Metal Surface Mechanical and Tribological Characteristics Using Cost Effective Electro-Spark Deposition

Electro-spark deposition (ESD) has been already recognized as an economically effective surface coating method. It requires a simple and low-cost equipment to run a process. Furthermore, mechanical and tribological properties of the coatings deposited using ESD are very promising, being, in many cases, improved compared to those of a substrate. When coatings are secondary treated via laser beam, they get a smoother surface and an amorphous structure. This paper reviews the investigations conducted on different substrates using different deposition materials via ESD as well as those of mechanical and tribological properties obtained. In particular, the review specifies: the role of ESD in enhancing the metal surface mechanical and tribological characteristics. It seems reasonable to apply ESD wider in order to improve mechanical and tribological properties of metal surfaces.