3D computer model of the Ag-Cu-Ni &lt;i&gt;T-x-y&lt;/i&gt; diagram: verification of sections in the atlas of phase diagrams for lead-free soldering

Three-dimensional (3D) computer model of the Al-Sn-Zn isobaric phase diagram is presented. It is shown that the T-x-y diagram consists of 64 surfaces and 25 phase regions. Features of Al-Zn binary system phase diagram related to decomposition of aluminum solid solution and its influence on geometric structure of liquidus and solidus surfaces in the ternary system, formed by this binary system and tin, are considered. Critical analysis of the published data was carried out and errors in visualization of those fragments of the Al-Zn T-x diagram, in which phase regions are formed with the participation of new aluminum solid solutions, appeared after the decomposition of the initial solid solution, are discussed. To design this 3D model, literary data were used, and the assessment of its quality is based on isopleths and isothermal sections from the same primary sources.

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Phase diagram of the eutectic type LiCl-PrCl3-KCl system with wedging liquidus of binary compound

Parfenova,

Vorob’eva,

Lutsyk

et al. 2024

Vescì Akademìì navuk Belarusì. Seryâ himičnyh navuk

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Based on the published experimental data (phase diagrams of three binary systems, four isothermal sections and DTA curves of 33 alloys), a spatial (three-dimensional – 3D) computer model of the LiCl-PrCl3-KCl phase diagram has been constructed. It is shown that, in the general case, the diagram is formed by 66 surfaces and 27 phase regions; however, due to the negligible solubility of the initial chlorides and the stoichiometry of the two binary compounds in reality, it consists of 31 surfaces and 14 phase regions. The evaluation of the quality of the obtained 3D model is a comparison of model and initial isothermal sections and calculation of response functions for 33 alloys with temperature values at the boundaries of the primary crystallization regions shown on DTA traces. The geometric structure of the LiCl-PrCl3-KCl phase diagram is also considered as an illustration of the features of ternary systems of the eutectic type, depending on the nature of the formed in them binary compounds.

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3D computer model of the Ag-Cu-Ni <i>T-x-y</i> diagram: verification of sections in the atlas of phase diagrams for lead-free soldering

Cited by 4 publications

References 23 publications

Problems in Imaging the Decomposition of Liquid and Solid Solutions in the Ag–Cu–Ni and Ag–Cu–Pb Systems

Problems in Imaging the Decomposition of Liquid and Solid Solutions in the Ag–Cu–Ni and Ag–Cu–Pb Systems

Assessment of effects of aluminum solid solution decomposition on geometric structure of Al-Sn-Zn isobar phase diagram

Phase diagram of the eutectic type LiCl-PrCl3-KCl system with wedging liquidus of binary compound

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