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• W4386749499 abstract "Interaction between the components in the Sm - V - Sn and Sm - Mn - Sn ternary systems was studied at 770 K (Sm - V - Sn) and 670 K (Sm - Mn - Sn) over the whole concentration range using methods of X-ray diffractometry, metallography and electron microprobe analysis. The alloys for investigation were prepared by direct arc melting the stoichiometric amounts of the constituent elements under high purity Ti-gettered argon atmosphere on a water-cooled copper hearth. To compensate the evaporative losses of samarium and manganese during arc-melting the 1-2 wt. % excess of Sm or Mn depending on composition was added. The arc-melted ingots were then annealed at 670 K (Sm - Mn - Sn) and 770 K (Sm - V - Sn) in evacuated quartz glass tubes for 720 hours and subsequently cold water quenched. For the characterization of the annealed samples X-ray powder diffraction on DRON-4.0 diffractometer with Fe K α radiation was performed. The chemical and phase compositions of the obtained samples were examined by Scanning Electron Microscopy (SEM) (Carl Zeiss DSM 962, REMMA-102-02 electron microscopes). At the temperatures of investigation a formation of the all binaries in the V-Sn, Sm-Mn and Mn-Sn systems which delimit the studied Sm - V - Sn and Sm - Mn - Sn was confirmed. In the Sm-Sn system binary phases Sm 5 Sn 3 , Sm 4 Sn 3 , Sm 5 Sn 4 , SmSn 2 , Sm 2 Sn 5 and SmSn 3 were identified at both 670 and 770 K. No ternary compounds were found in the Sm - V - Sn at the temperature of investigation 770 K. Solubility of the third component in the binary compounds is less than 1-2 at. %. The phase relations in the Sm-Mn-Sn system at 670 K are characterized by existence of four ternary compounds SmMn 6 Sn 6 (YCo 6 Ge 6 structure type, space group P 6/ mmm , a =0.5534(1) nm, с =0.4521910(1) nm), Sm 3 Mn 4 Sn 4 (Gd 3 Cu 4 Ge 4 structure type, space group Immm , a =0.4523(3), b =0.7457(4), c =1.4911(6) nm), SmMn 1- х Sn 2 (CeNiSi 2 structure type, space group Cmcm ) and Sm 4 Mn 4 Sn 7 (Zr 4 Co 4 Ge 7 structure type, space group I 4/ mmm , a =1.5099(7) nm, c =0.5985(3) nm). It was established that SmMn 1- х Sn 2 stannide is characterized by small homogeneity range limited by compositions SmMn 0 . 33 Sn 2 and SmMn 0 . 23 Sn 2 ( а = 0.4477(2)-0.4466(1), b = 1.6666(7)-1.6626(8), с = 0.4386(2)-0.4377(2) nm). Solubility of the third component in the binary compounds is less than 1.5-2 at. %. Except the Sm–V–Sn system, in which ternary compounds are not formed, the Sm–M–Sn systems with other d -elements are characterized by differ stoichiometry and the crystal structures of the formed ternary compounds. Stannides with CeNiSi 2 -type exist in the systems with Mn, Fe, Co and Ni, SmM 6 Sn 6 are formed with Mn and Fe, compounds with Gd 3 Cu 4 Ge 4 -type are typical in the systems with Mn and Cu. Keywords: ternary system, intermetallics, phase equilibria." @default.
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• W4386749499 date "2023-01-01" @default.
• W4386749499 modified "2023-09-26" @default.
• W4386749499 title "Phase diagrams of the Sm-{V, Mn}-Sn ternary systems" @default.
• W4386749499 doi "https://doi.org/10.30970/vch.6401.041" @default.
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