Structure of liquid Al-Ni-Sn

Formation of the Short‐Range Order in Liquid Al−Ni−Sn Alloys

“…The existence of a minimum on the concentration dependence of the R 1 (Figure 4d) for the Al‐Ni 43 Sn 57 section is consistent with the extreme value of the enthalpy of mixing (−25 kJ/mol) at x Al =40 at.% (Figure 6). The decrease in the nearest interatomic distance for Al 90‐x Ni 10 Sn x , [10b] Al 80‐x Ni 20 Sn x (Figure 3a), and Al 25 Ni 75‐x Sn x (Figure 3b) sections when moving towards Al−Ni binary system is in good agreement with the increase in the exothermicity of the enthalpy of mixing for the corresponding melts (Figure 6). It may also be noted that melts with a complex shape of the first maximum (the presence of atomic clusters with different SRO) have relatively close mixing enthalpies: Al 90‐x Ni 10 Sn x (−25 kJ/mol), Al 52 Ni 20 Sn 28 (−24 kJ/mol), Al 59 Ni 10 Sn 31 (−12 kJ/mol).…”