Interaction of the components
in the system Hf–Re–Si
Chem.
Met. Alloys 12 (2019)
88-92
https://doi.org/10.30970/cma12.0398
Liana ZINKO, Oksana MATSELKO,
Vasyl KORDAN, Galyna
NYCHYPORUK, Roman GLADYSHEVSKII
The interaction of
the components in the ternary system Hf–Re–Si at 1000°C has been
investigated by means of X-ray powder diffraction and scanning electron
microscopy with energy-dispersive X-ray spectroscopy. The system is characterized
by the formation of solid solutions based on the binary phases. In addition to HfReSi and HfReSi2, two more ternary phases,
with approximate compositions Hf23(2)Re4(1)Si73(1)
(T1) and Hf71(2)Re18(3)Si11(1) (T2), were
observed. According to the EDXS analysis, the highest
solubility of the third component was found for HfRe2 (up to 36.4 at.% Si) and Re4Si7
(up to 23.8 at.% Hf). The ternary phase HfReSi exhibits a significant homogeneity range with an
approximately constant Hf content at 1000°C (Hf29.1(3)-25.0(4)Re30.3(5)-45(2)Si40.6(8)-30(2)).
Microstructures of selected samples
(BSE images) and compositions of the observed phases.
Keywords
Hafnium / Rhenium /
Silicon / X-ray powder diffraction / Scanning electron microscopy