Experimental Study of the Mg-Ni-Y System at 673 K Using Diffusion Couples and Key Alloys

Abstract

Three solid-solid and two solid-liquid diffusion couples together with 32 key samples were used to construct the isothermal section of the Mg-Ni-Y system at 673 K. The present investigation revealed 12 ternary intermetallic compounds. Crystal structures of two ternary compounds τ1 (Gd4RhIn prototype with lattice parameter of a = 1.3666 nm) and τ2 (Mo2FeB2 prototype with lattice parameters of a = 0.7395 nm and c = 0.3736 nm) were determined. The phase relations and ternary solubility of the binary and ternary compounds at 673 K were determined using scanning electron microscopy (SEM), wave dispersive X-ray spectrometer (WDS) and X-ray diffraction (XRD) analysis.

Structure and magnetic properties of RE4Ni2Mg3 with RE=Y, Tb−Tm and Lu – New representatives of the Ru4B2Al3 type

“…Some rapidly solidified RE x T y Mg z compositions have also been discussed in the context of metallic glasses. [35] Although the REÀ NiÀ Mg systems [7][8][9][10][11][12][13][14][15] in particular have been studied intensively, they are far from being completely understood. A good example is the YÀ NiÀ Mg [10] phase diagram, which was originally only studied in the region of 50-100 at.% nickel concentration.…”

“…Although the RE− Ni−Mg systems [7–15] in particular have been studied intensively, they are far from being completely understood. A good example is the Y−Ni−Mg [10] phase diagram, which was originally only studied in the region of 50–100 at.% nickel concentration.…”

“…A good example is the Y−Ni−Mg [10] phase diagram, which was originally only studied in the region of 50–100 at.% nickel concentration. The complete isothermal section was studied later [14] . However, several structures of the occurring ternary phases remained unsolved.…”

“…[2] Besides simple phase analyses, these RE x T y Mg z phases have intensively been studied with respect to their crystal chemistry and broadly varying physical properties. Although many details on RE x T y Mg z phases are already known, complete isothermal sections have only been studied for a few REÀ CoÀ Mg, [3][4][5][6] REÀ NiÀ Mg [7][8][9][10][11][12][13][14][15] and REÀ CuÀ Mg [16][17][18][19][20] phase diagrams, most likely since the 3d elements are less expensive.…”

“…The complete isothermal section was studied later. [14] However, several structures of the occurring ternary phases remained unsolved. The comprehensive crystal chemical study was reported only recently, [36] including the Ru 4 B 2 Al 3 type [37,38] phase Y 4 Ni 2 Mg 3 .…”