Hydrogenation, Disproportionation, Desorption, and Recombination in the Sm2Co17–x Fe x –H2 System (x =3.9 and 5.95). X-Ray Diffraction
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.
Keywordshydrogenation, disproportionation, desorption, recombination samarium–cobalt alloys two-phase ferromagnetic materials
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