Open AccessFormation and characterization of Al-Hf alloys by selective electron-beam surface alloying
Author(s) -
Stefan Valkov,
Petеr Petrov
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1492/1/012042
Subject(s) - scanning electron microscope , microstructure , materials science , energy dispersive x ray spectroscopy , cathode ray , electron beam induced deposition , analytical chemistry (journal) , homogeneous , diffraction , electron , optics , metallurgy , composite material , scanning transmission electron microscopy , chemistry , physics , chromatography , quantum mechanics , thermodynamics
We report electron-beam surface alloying of Al substrates with Hf. The Al substrates were covered by a Hf coating with a thickness of 2 μm; the samples were alloyed by means of a scanning electron beam with circular geometry of the beam deflection. The phase composition of the obtained specimens was studied by X-ray diffraction (XRD); their microstructure and chemical composition were investigated by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX), respectively. The results showed that the phase composition did not depend on the speed of sample motion. However, their microstructure was significantly finer and more homogeneous in the case of the lower speed of motion V 1 = 0.5 cm/s in comparison with the higher speed V 2 = 1 cm/s.