Abstract
Component interactions in the iron-molybdenum-samarium system at 773 K were studied by powder X-ray diffraction, microstructure observation, electron probe microanalysis, and hardness and microhardness testing. The formation of a ternary intermetallic compound π with a ThMn12 structural type was found in this system. Binary intermetallc compounds were found to interact not only with one another to form two-phase equilibria ( Fe2Mo + Fe7Mo6, Sm2Fe17 + SmFe3, SmFe3 + SmFe2, and Fe2Mo6 + SmFe2) but also with pure components (Fe + Fe2Mo, Fe + Sm2Fe17, Mo + Fe7Mo6, Sm + SmFe2, and Sm + Fe7Mo6). Three-phase regions were also detected in th e isothermal section of the diagram: Fe + Fe2Mo + Ψ, Fe7Mo6 + Fe2Mo + Ψ, Fe7Mo6 + SmFe2 + Ψ, and SmFe3 + SmFe2 + Ψ.
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