Zhenmin Du

Thermodynamic assessment of the NiY system

Abstract By means of the software Thermo-Cale, the NiY system has been assessed. The thermodynamic parameters of individual phases, including solutions of b.c.c., f.c.c., h.c.p., liquid and intermetallic compounds Ni17Y12, Ni5Y, Ni4Y, Ni7Y3, Ni3Y, Ni2Y, NiY, Ni2Y3 and NiY3 have been found. Very good agreement is obtained between calculation and experiment.

Thermodynamic assessment of the Co–Pr, Er–Ni and Ni–Pr systems

Abstract By means of CALPHAD technique, the Co–Pr, Er–Ni and Ni–Pr systems were critically assessed. The solution phases (liquid, bcc, fcc, hcp and dhcp) are modeled with the Redlich–Kister equation, and the intermetallic compounds treated as stoichiometric compounds. Self-consistent thermodynamic parameters of the Co–Pr, Er–Ni and Ni–Pr systems were obtained. The calculations agree well with experiments.

A thermodynamic assessment of the Co-Sm system

Abstract The phase diagram and thermodynamic data of the Co–Sm system were critically assessed by means of the computer-operated least-squares method, using models for the Gibbs energy of individual phases. Consistent sets of thermodynamic functions for the Co–Sm system were obtained. Good agreement is obtained between the calculation and experimental results. The system contains eight different intermetallic compounds.

A thermodynamic assessment of the Ni–Sm system

Abstract The phase diagram and thermodynamic data of the Ni–Sm system were assessed by means of the computer program THERMO-CALC , using models for the Gibbs energy of individual phases. The system contains eight intermetallic compounds. A consistent set of thermodynamic parameters was derived.

Thermodynamic assessment of the Eu–Pd system

Abstract The Eu–Pd system was critically assessed by means of the CALPHAD technique. The solution phases (liquid, bcc, and fcc) were modeled with the Redlich–Kister equation. The intermetallics were treated as stoichiometric compounds. A set of self-consistent thermodynamic parameters of the Eu–Pd system was obtained.

Thermodynamic modelling of the Er–Pd system

Abstract By means of the CALPHAD technique, the Er–Pd system was critically assessed. The solution phases (liquid, f.c.c. and h.c.p.) are modeled with the Redlich–Kister equation. The intermetallic compounds ErPd 3 and ErPd, which have a homogeneity range, are treated as the phases MPd 3 and ErM, respectively, by a two-sublattice model with Pd in MPd 3 and Er in ErM on one sublattice and M on the other one, where M is used as an abbreviation for a mixture of Er and Pd. The other compounds were treated as stoichiometric. A set of self-consistent thermodynamic parameters of the Er–Pd system was obtained.

Thermodynamic assessment of the Cu–La system

Abstract By means of CALPHAD technique, the Cu–La system was critically assessed. The solution phases (liquid, b.c.c., f.c.c. and d.h.c.p.) are modeled with the Redlich–Kister equation, and the intermetallic compounds treated as stoichiometric compounds. Self-consistent thermodynamic parameters of the Cu–La system were obtained. The calculations agree well with experiments.

Thermodynamic assessment of the Gd-Pd system

Abstract The Gd–Pd system was critically assessed using the CALPHAD technique. The solution phases (liquid, bcc, fcc and hcp) were modeled with the Redlich–Kister equation. The intermetallic compounds GdPd and GdPd 3 , which have a homogeneity range, are treated as the phases GdM and MPd 3 , respectively, by a two-sublattice model with Gd in GdM and Pd in MPd 3 on one sublattice and M on the other, where M is used as an abbreviation for a mixture of Gd and Pd. The other phases were treated as stoichiometric compounds. A set of self-consistent thermodynamic parameters of the Gd–Pd system was obtained.

Thermodynamic modeling of the Dy–Pd system

Abstract The Dy–Pd system was critically assessed by means of the CALPHAD technique. The solution phases (liquid, bcc, fcc and hcp) were modeled with the Redlich–Kister equation. The intermetallic compounds DyPd and DyPd 3 , which have a homogeneity range, were treated as the phases DyM and MPd 3 , respectively, by a two-sublattice model with Dy in DyM and Pd in MPd 3 on one sublattice and M on the other, where M is used as the abbreviation for a mixture of Dy and Pd. The other phases were treated as stoichiometric compounds. A set of self-consistent thermodynamic parameters of the Dy–Pd system was obtained.

A thermodynamic description of the Fe-Co-Gd system

Abstract The phase diagram and thermodynamic data of the Fe–Co–Gd system were critically assessed by means of the computer program, thermo-calc , using models for the Gibbs energy of individual phases. Previous assessments of the three binary systems were incorporated. The system contains eight different compounds and they are all treated as line compounds. Good agreement is obtained between the calculation and experimental results in the ternary system.