Microstructure and Mechanical Properties of (TiAlSi)N Medium Entropy Coatings

Authors :: ZHANG Ya-nan, ZHANG Hao, ZHOU Zi-chao, XIAO Yu-qi, DENG Na, FU Bin-yun, DUO Shu-wang
Source :: Cailiao Baohu, Vol 55, Iss 3, Pp 23-27 (2022)
Publication Year :: 2022
Publisher :: Editorial Department of Materials Protection, 2022.
Abstract: In order to improve the protective effect of the surface coating of mechanical parts, combining with the unique design concept of medium entropy alloy,(TiAlSi)N coatings were deposited on surface of 316 L stainless steel by plasma enhanced magnetron sputtering(PEMS). The chemical composition, crystal structure, micro-morphology and surface roughness of coatings were analyzed using X-ray energy dispersive spectrometer(EDS), X-ray diffractometer(XRD), field emission scanning electron microscope(FE-SEM) and atomic force microscope(AFM). The bonding strength, hardness and elastic modulus of the coatings were tested with nano scratch/indentation instrument. EDS analysis results showed that(TiAlSi)N coating was a medium entropy ceramic coating.(TiAlSi)N coatings possessed an amorphous structure, a smooth and compact surface, and good mechanical properties. The bonding strength, hardness and elastic modulus were 25 N, 21 GPa and 225 GPa, respectively. These experimental results would provide a valuable data reference for further future research on this kind of coating systems.