| Abstract: |
HEAs alloys, due to their peculiar chemical composition, are of great interest in the material science community for their potential application in advanced industrial sectors. These new alloys contain multiple elements in the same quantity and for this reason, there is no doubt true that they can reach unique mechanical properties. But there is a lack of information, because there is not so much data available in scientific literature about the use of equiatomic HEAs starting powders to produce thermally sprayed coatings. In this study, Atmospheric Plasma Spray (APS), High Velocity Oxy Fuel (HVOF) and Cold Spray (CS) processes are used to deposit FeCoCrAlNi coatings on different substrate. Starting feedstock powders are characterized in terms of size, shape and phase while for APS, HVOF and CS techniques, the process parameters are optimized to improve deposition efficiency and porosity of obtained coatings. Besides, on the optimized coatings, corrosion tests in 3.5% NaCl solution, as well as rubber wheel, ball on disk and water jet erosion tests are carried out to test their wear behavior. Also, the corrosion and wear behavior of the optimized coatings, are benchmarked with 316L and C-Steel bulks. The obtained results show that FeCoCrAlNi HEAs coatings deposited via thermal spray processes, are suitable for surfaces protection.
|
|
