Mariya Yurechko

Investigation of the Al–Cu–Rh phase diagram in the vicinity of the decagonal phase

Abstract Phase equilibria were studied in Al-rich Al–Rh and Al–Cu–Rh alloys. We present a partial Al–Rh phase diagram. In addition to previously reported Al–Rh phases, two complicated orthorhombic compounds were found close to the Al 3 Rh composition. Partial 900 and 800°C isothermal sections of the Al–Cu–Rh phase diagram were studied in the vicinity of the decagonal phase. At these temperatures the stable decagonal phase was found to be the only ternary compound. It is in equilibrium with the ternary extensions of three binary Al–Rh phases and at 900°C also with the liquid.

Isothermal sections of the Al–Pd–Co alloy system for 50–100 at.% Al

Abstract The Al–Pd–Co alloy system was studied in the range of 50 to 100 at.% Al. Isothermal sections at 1050, 1000, 940 and 790 °C were determined. The isostructural AlCo and AlPd phases form a continuous range of solid solutions. The Al–Pd e-phase(s) region extends up to ∼16.1 at.% Co, Al 3 Pd 2 up to 7.1 at.% Co, M-Al 13 Co 4 , Al 5 Co 2 , Al 9 Co 2 and the Al–Co Z-phase exhibit moderate extensions into the ternary compositional range of the phase diagram. Six stable ternary compounds designated W, Y 2 , U, V, F and C 2 were revealed and characterized.

Ternary Al–Pd–Co monoclinic phases

Abstract The ternary Al–Pd–Co V-phase and U-phase (reported previously) were studied by powder X-ray and electron diffraction. The V-phase was found to have a primitive monoclinic structure [ a =1.0068(2) nm, b =0.3755(1) nm, c =0.6512(4) nm and β =102.38(6)° for Al 70.0 Pd 9.2 Co 20.8 ]. The U-phase was found to have a C -centered monoclinic structure [ a =1.9024(4) nm, b =2.9000(4) nm, c =1.3140(4) nm; β =117.26(3)° for Al 69.1 Pd 16.5 Co 14.4 ].