Differential thermal analysis and X-ray diffraction are used to study phase transitions in the Sm2Co17–xFex–H2 system (x =3.9 and 5.95) during conventional and solid HDDR at hydrogen pressure 0.57–4.0 MPa and temperature up to 950°C. The ferromagnetic phase with Th2Zn17 structure disproportionates into SmH2±x, cobalt, and intermetallic FeCo after one-hour interaction with hydrogen at 1.1 and 0.6 MPa and 700°C with x =3.9 and 5.95. Recombination in vacuum at 770–950°C leads to a two-phase alloy consisting of the Th2Zn17-type phase and intermetallic FeCo.
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Translated from Poroshkovaya Metallurgiya, Vol. 53, No. 5–6 (497), pp. 115–126, 2014.
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Bulyk, I.I., Pilat, M.V. & Lyutyy, P.Y. Hydrogenation, Disproportionation, Desorption, and Recombination in the Sm2Co17–x Fe x –H2 System (x =3.9 and 5.95). X-Ray Diffraction. Powder Metall Met Ceram 53, 343–352 (2014). https://doi.org/10.1007/s11106-014-9622-2
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DOI: https://doi.org/10.1007/s11106-014-9622-2