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1216 |
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Structure and properties of powders of quasicrystalline
alloys AlCuFe alloyed by Cr and Sc
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Yuri Borisov / E.O. Paton Electric Welding Institute, Ukraine Alla Borisova / Paton Welding Institute, Ukraine Ljudmila Adeeva/ Paton Welding Institute, Ukraine Alla Tunik/ Paton Welding Institute, Ukraine Miroslav Karpets/ Paton Welding Institute, Ukraine Lidija Doroshenko/ Paton Welding Institute, Ukraine |
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Development of thermal spraying of quasicrystalline coatings is connected with development of new powders produced from alloyed quasicrystalline alloys. Powders of AlCuFe alloyed by Cr and Sc were produced by high ¡V pressure water atomization of melt. Phase composition, microstructure, morphology, flowability of the powders were investigated. Resistance of powders to oxidation in air was studied using termography. It was determined that doping of AlCuFe ¡V alloy by 0,265 and 0,440 at.% Sc and by 8 at.% Cr significantly increases in them content of quasicrystalline phases. Annealing of AlCuFeCr at 550?aC leads to transformation quasicrystalline phase into crystalline approximant of decagonal quasicrystalline phase. |