Abstract
AlCoCuFeMnNi high-entropy alloy coating was prepared by plasma cladding method. The phase structure and microstructure of AlCoCuFeMnNi coating was investigated by XRD, SEM and EDS respectively. The results show that AlCoCuFeMnNi caotings have two BCC phase structure and typical dendrite structure and form good metallurgical bonding with substrate. The dendrite is the typical spinodal decomposition structure. After CeO2 doping, the change of peak intensity and FWHM is obvious due to the effect of Ce on the improvement of grain growth, microstructure and crystallinity. The addition of CeO2 is beneficial to reduce the cladding defect, make dendrite arm spacing enlarged and spinodal decomposition structure refined, and improve element segregation owing to the melioration effect in the temperature gradient, solidification rate, fluidity, wettability, and surface tension.
Highlights
As a new idea of alloy design, high entropy alloys (HEAs) break through convention alloy design method in which one or two elements are used as principal element and have more than five elements as principal element and the concentration of each element in the range of 5at%-35at%1
HEAs research has mainly focused on the aspects of composition design, mechanical properties, phase structure and so on . 6-14 The composition design for HEAs is primarily based on CoCrFeNi series to add some other alloy elements to synthesize more than five multiprincipal alloys[6,7,8,9,10,11]
The mechanical properties of HEAs are mainly concentrated on the study of high hardness, high strength, compression and tensile properties and so forth . 8-13 The phase structure of HEAs is in the terms of phase formation and phase composition . 6-14 It is well known that CeO2 can play a role in the purifying to molten alloy, the improvement of alloy casting properties, the refinement of the microstructure
Summary
As a new idea of alloy design, high entropy alloys (HEAs) break through convention alloy design method in which one or two elements are used as principal element and have more than five elements as principal element and the concentration of each element in the range of 5at%-35at%1. HEAs have many excellent properties[1,2,3,4,5,6], such as high strength, high hardness, high thermal stability, good wear resistance, high corrosion resistance, etc. HEAs research has mainly focused on the aspects of composition design, mechanical properties, phase structure and so on . 6-14 The composition design for HEAs is primarily based on CoCrFeNi series to add some other alloy elements to synthesize more than five multiprincipal alloys[6,7,8,9,10,11]. The mechanical properties of HEAs are mainly concentrated on the study of high hardness, high strength, compression and tensile properties and so forth . The mechanical properties of HEAs are mainly concentrated on the study of high hardness, high strength, compression and tensile properties and so forth . 8-13 The phase structure of HEAs is in the terms of phase formation and phase composition . 6-14 It is well known that CeO2 can play a role in the purifying to molten alloy, the improvement of alloy casting properties, the refinement of the microstructure,
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