Journal of Phase Equilibria and Diffusion

http://link.springer.com/journal/11669

List of Papers (Total 344)

New Thermodynamic Assessment of the Fe-Y System

Critical review of the Fe-Y binary system has been performed and available experimental and calculated data have been collected. Thermodynamic parameters were optimized using the CALPHAD method. New experimental results of Gibbs energy and Ab-initio calculations of enthalpy of formation of intermetallic compounds have been taken into account. A self-consistent thermodynamic...

Evaluation of Calphad Approach and Empirical Rules on the Phase Stability of Multi-principal Element Alloys

The formation of single disordered solid solution phase in multi-principal element alloys (MPEAs) is crucial for the properties of the alloy, and thus several empirical rules have been proposed to predict the stability of disordered solid solution phase in MPEAs. Compared to these empirical rules, Calphad approach provides a more reliable and quantitative prediction. In the...

TCHEA1: A Thermodynamic Database Not Limited for “High Entropy” Alloys

In this paper we report a thermodynamic database which was developed by using the CALPHAD approach. The TCHEA1 database includes 15 chemical elements (Al, Co, Cr, Cu, Fe, Hf, Mn, Mo, Nb, Ni, Ta, Ti, V, W and Zr). It is suitable for the study of Bcc and Fcc HEA systems. The database is constructed based on the thermodynamic assessment of all binary systems and many key ternary...

Thermodynamic Study and Re-optimization of the Au-Ga Binary System

Activities of gallium in the liquid Au-Ga alloys were determined using galvanic cells with the solid oxide electrolyte. The cells of the type:$${\text{Au}}_{x} {\text{Ga}}_{(1 - x)} //{\text{ ZrO}}_{2} + {\text{Y}}_{2} {\text{O}}_{3} //{\text{ Fe}},\,{\text{FeO}}$$were used in the temperature range from 1050 to 1273 K, and for four alloy compositions x Ga = 0.2, 0.4, 0.6 and 0.8...

Experimental Study and Thermodynamic Re-optimization of the FeO-Fe2O3-SiO2 System

Phase equilibria and thermodynamic data in the FeO-Fe2O3-SiO2 system were critically reviewed. New experiments were undertaken to resolve discrepancies found in previous data. The liquid oxide/slag phase was described using the modified quasichemical model. New optimized parameters of the thermodynamic models for the Gibbs energies of slag and other phases in the selected system...

Microstructure and Electro-Physical Properties of Sn-3.0Ag-0.5Cu Nanocomposite Solder Reinforced with Ni Nanoparticles in the Melting-Solidification Temperature Range

The electrical conductivity of nanocomposite Sn-3.0Ag-0.5Cu alloys with two different weight percentages of Ni nanoparticles (1.0 and 2.0 wt.%) was measured over a wide temperature range. The samples were produced using a cold pressing method: Sn-3.0Ag-0.5Cu powder and Ni nanopowder were mechanically mixed and pressed into 8 mm diameter rods. Ni nanoparticles were synthesized via...

Foundations and Practical Implementations of the Cluster Expansion

Different versions of the cluster expansion are explored using the Mo-Ta system as an example. One of the objectives of this work is to establish a clear distinction between phenomenological expansions that express the energy of an alloy in the form of a generalized Ising model, i.e. with constant pair and many body interactions, and cluster expansions that use a set of complete...

Diffusion in FCC Co-rich Co-Al-W Alloys at 900 and 1000 °C

Diffusion couple experiments between various Co-rich face centered cubic (FCC) alloys in the Co-W-Al ternary system have been conducted at 900 and 1000 °C. Diffusion coefficients have been extracted for the Co-W binary and for ternary alloys at compositions where the diffusion paths cross. In addition, a least squares method has been utilized to optimize diffusion mobility...

Experimental Investigation of the Binary Mn-Sb Phase Diagram

The binary manganese-antimony (Mn-Sb) phase diagram was reinvestigated in the whole composition range using powder-XRD, DTA and SEM-EDX. The phase boundaries and melting temperatures of the ferromagnetic phases MnSb and Mn2Sb were modified by taking into account the new experimental data. Most of the reaction temperatures could be verified within a range of ±10 °C. Nevertheless...

Studies on the Solidification Path of Single Crystal Superalloys

Single crystal superalloys are widely used in high temperature sections of turbines, where they are able to withstand extended exposure to high temperatures. As these alloys are commonly cast and directionally solidified via the Bridgman process, the knowledge of their solidification path is of great importance. This paper gives an overview of aspects of the solidification path...