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牛雪莲,Jellinek Julius,周丹,杨桂娟,于游.电子束蒸发制备高熵合金涂层AlxFeCoCrNiCu(x = 0.25, 0.5 and 1.0)的微观结构和耐腐蚀性能研究[J].稀有金属材料与工程(英文),2017,46(12):3621~3625.[Niu Xuelian,Jellinek Julius,Zhou Dan,Yang Guijuan and Yu You.Microstructure and corrosion properties of AlxFeCoCrNiCu(x = 0.25, 0.5 and 1.0) thin coatings on steel substrates deposited by electron beam evaporation[J].Rare Metal Materials and Engineering,2017,46(12):3621~3625.]
Microstructure and corrosion properties of AlxFeCoCrNiCu(x = 0.25, 0.5 and 1.0) thin coatings on steel substrates deposited by electron beam evaporation
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Received:October 22, 2016  Revised:December 27, 2016
DOI:
Key words: high-entropy alloy  coating  steel  corrosion resistance
Foundation item:科技部重大支撑项目
Author NameAffiliation
Niu Xuelian,Jellinek Julius,Zhou Dan,Yang Guijuan and Yu You  
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Abstract:
      High entropy alloy (HEA) thin coatings have been deposited on steel substrate of a mixed alloy power made of high purity elemental aluminium, cobalt, chromium, copper, iron and nickel by electron beam evaporation and effect of the Al content of the coating on its structural, surface morphology and electrical properties were investigated. The results of X-ray diffraction (XRD) showed that coatings were typical dendrite and interdendrite structures with different aluminum contents. The coatings’ surface chemistry components were basically similar composition as originally designed alloys by electron probe micro-analyzer (EPMA). Atomic force microscopy (AFM) indicated that modified the surface of all coatings were very smooth and uniform. HEA coatings exhibited wide passive regions, which extended >700 mV in aqueous solutions of H2SO4 and NaCl. A large corrosion potential (-129 mV) and a small corrosion current density (≈2.2×10-6 A/cm2) clearly revealed that the corrosion resistance of the Al0.5FeCoCrNiCu coating was superior to that of the coatings.