Critical evaluation and thermodynamic modeling of the Ag-X (X=Mn, Y, Sr) binary systems. (September 2021)

• Record Type: Journal Article
• Authors: Wang, Jian; Zhang, Zhang; Jung, In-Ho; Rao, Wei-Feng
• Is Part Of: Intermetallics. Volume 136(2021)
• Publication Date: 2021-09
• Subjects: CALPHAD -- DSC -- Ag–Mn system -- Ag–Y system -- Ag–Sr system; Intermetallic compounds -- Metallography -- Periodicals; Metallic glasses -- Periodicals; Composés intermétalliques -- Métallographie -- Périodiques; 669.94
• DOI: 10.1016/j.intermet.2021.107260
• Languages: English
• ISSNs: 0966-9795

Abstract

Abstract: A complete literature review, critical evaluation and thermodynamic assessment of the Ag-X (X = Mn, Y, Sr) binary systems have been conducted. The Modified Quasi-chemical Model in the Pair Approximation (MQMPA) was applied to describe the Gibbs energy of the liquid phase. The Gibbs energy of all intermetallic compounds and terminal solid solutions was described by the Compound Energy Formalism (CEF). The critical literature assessment and thermodynamic modeling of the Ag–Mn binary system were carried out for the first time. The Differential Scanning Calorimetry (DSC) measurement was carried out to resolve the discrepancy of liquidus in Ag-rich region of the Ag–Sr binary system. Thermodynamic re-optimization of the Ag–Sr binary system was performed based on reported literature data and our new measured results using DSC technique. Thermodynamic re-optimization of the Ag–Y binary system was also carried out with considering the ordered bcc_B2 crystal structure of the AgY compound. All reliable experimental data are well reproduced within the experimental limits. A self-consistent thermodynamic database of the Ag-X (X = Mn, Y, Sr) binary systems was constructed for the development of new biomaterials. Highlights: A critical literature evaluation and thermodynamic assessment of the Ag-X (X = Mn, Y, Sr) binary systems were presented. The Ag-X (X = Mn, Y, Sr) binary systems were optimized using the modified quasi-chemical model (MQM) for liquid phase. The ordered bcc_B2 crystal structure of the compound AgY has been considered in the present optimization. The DSC measurements were carried out to verify the phase transitions in the Ag-rich region of Ag–Sr binary system.