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Calorimetric Studies of the Silver-Titanium System.
Weronika Gozdur1, Wojciech Gierlotka2, Władysław Gąsior1
1Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 25 Reymonta St., 30-059 Krakow, Poland.
Molecules (Basel, Switzerland)
|October 16, 2025
Summary
This study experimentally determined thermodynamic properties of silver-titanium (Ag-Ti) alloys, including novel synthesis using titanium hydride. Results refine the Ag-Ti phase diagram, crucial for understanding these promising materials.
Area of Science:
- Materials Science
- Thermodynamics
- Metallurgy
Background:
- Silver-titanium (Ag-Ti) alloys possess attractive properties for versatile applications.
- Existing thermodynamic data for Ag-Ti alloys are largely based on computational methods due to experimental challenges like differing melting points.
- There is a need for experimentally determined thermodynamic properties to validate and refine Ag-Ti alloy understanding.
Purpose of the Study:
- To experimentally determine thermodynamic properties of selected Ag-Ti alloys.
- To investigate a novel synthesis route for Ag-Ti alloys using titanium hydride.
- To reoptimize the Ag-Ti phase diagram based on new experimental data.
Main Methods:
- Differential Scanning Calorimetry (DSC) for characteristic temperature determination of Ag0.43Ti0.57 alloy.
- High-temperature drop calorimetry for mixing enthalpy and AgTi intermetallic formation enthalpy measurements.
- Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD) for structural characterization.
Main Results:
- Characterization of Ag0.43Ti0.57 alloy synthesized using titanium hydride, a previously unreported method.
- Determination of mixing enthalpy in Ag-Ti alloys (xTi = 0.02–0.226) and enthalpy of formation for the AgTi phase.
- Reoptimization of the Ag-Ti phase diagram incorporating the new experimental calorimetric data.
Conclusions:
- The study provides crucial experimental thermodynamic data for Ag-Ti alloys.
- The novel synthesis using titanium hydride is viable and characterized.
- The refined Ag-Ti phase diagram offers a more accurate representation for future alloy development.
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