Constitution of magnesium–indium alloys containing 23–100 atomic % indium

Abstract

A constitutional diagram for magnesium-indium alloys containing between 23.2 and 100 atomic % indium has been established using differential thermal analysis, electrical resistivity, and metallographic methods.An intermediate solid solution, B, with a wide range of homogeneity, is formed peritectically from the liquid and a, the magnesium primary solid solution. It extends between 23 atomic % indium at 485.3 'C and 86 atomic % indium at 160.2 "C, where it is in equilibrium with y, the indium primary solid solution. Magnesium has a limited solid solubility in indium of about 6 atomic %.For alloys containing up to 50 atomic % indium, the derived constitutional diagram is in good agreement with that of a previous investigation (2). Two exceptions are noted: first, there is no evidence of a long period superlattice, J3"' of the CuAu I1 type, and second, a reaction is observed involving a transition between the two ordered phases J3' and S". For the indium-rich alloys no intermediate or ordered phase formation is observed.The results have been discussed in terms of the cxisting phase diagrams.

High-throughput ab initio analysis of the Bi–In, Bi–Mg, Bi–Sb, In–Mg, In–Sb, and Mg–Sb systems

“…Five ordered compounds have been reported for the system Mg-In at low temperatures [11,12,[36][37][38][39][40][41]: [11]), Mg 5 In 2 -D8 g (β 3 ), and Mg 3 In (β 1 ) with Pearson symbol hR48, and space group R 3m (# 166) [11,12] (note that β 1 has Pearson symbol hR16 in Massalski [11]). At high temperatures phase β 1 transforms into the L1 2 structure, which is similar to the high temperature field β ′ .…”

Microstructure of Mg–In Alloy Systems and Their Room Temperature Rollability

“…Watanabe et al reported that the Mg 0.1 In 0.9 phase with disordered solid solution transforms into an L1 2 -type ordered structure. 15) The L1 2 -type structure is occupied by In and Mg atoms at the face center and body corner positions in the FCC lattice, respectively. The angles of the diffraction peaks are those of the Mg 3 In (space group: Pm 3m) phase in which all Mg and In atoms are ordered according to the L1 2 type.…”

“…Mg-In alloy binary phase diagrams and the long-period stacking structure of the Mg 3 In phase for Mg-In alloys, [15][16][17] there are few reports on the changes in microstructure and workability due to the addition of a third element.…”