Properties of the ternary Ag-Ge-In alloys

TPD 2019Alloying presents an important and time consuming task for researchers all over word. Since the properties of materials can be change by adding other elements it is encouraging to study different alloys in way to get alloys with good properties. In our group we are focusing on Ge alloys and their properties [1-5] due to the technical importance of the systems based on Ge and their special application as a phase change memory materials (PCM materials). Electrical and mechanical properties of ternary Ag-Ge-In system have not been investigated before. The reason for this study is experimental investigation of electrical and mechanical properties of the ternary Ag-Ge-In alloys at room temperature (≈25°C). In the current study phase equilibria of the isothermal section at 25 °C have been investigated by using scanning electron microscopy (SEM) with energy dispersive spectrometry (EDS) and x-ray diffraction (XRD). Ternary Ag-Ge-In alloys have been tested with Brinell hardness test and test for electrical conductivity. Experimental results of Brinell hardness and electrical conductivity have been used for obtaining mathematical model for estimation of those properties for every composition of alloys at room temperature (≈25°C). Obtained results aimed to provide better insight into properties of alloys which should contribute to further expansion of their application possibilities.The Ministry of Education, Science and Technological Development of the Republic of Serbia (Grant No. OI172037)https://ftn.pr.ac.rs/Publishe

Rationalization of a Core Warehouse in the Casting Plant: A Case Study

The warehouse is an important factor in the manufacturing process. At present, there are constant demands for the more efficient and effective operation of warehouse systems. For this reason, the rationalization of existing warehouses and/or storage systems is one of the ways to achieve the previously set targets. The possibilities of rationalization are numerous in all segments of the observed system. The most suitable solutions for a particular warehouse will be found based on the nature of the observed problem and the available investment funds. The paper defines the place and the role of the warehouse in a casting plant. Besides, the current situation in the warehouse segment of casting plants is analyzed to identify problems. Finally, the development of different concepts of rationalization to relevant constraints is discussed. This approach has enabled us to solve the problem of the rationalization task and to produce the desired effects

Preface: Thermal Processing and Thermophysical Properties of Metals, Intermetallics, Alloys and Composites 2019 (TPTPMIAC2019)

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Thermodinamics and surface properties of liquid Ga-X (X = Sn, Zn) alloys

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Study of electrical conductivity and hardness of the alloys of ternary Bi-Sb-Zn system and calculation of isothermal section at 298 K

Considering the importance of the lead-free solders, alloys of ternary Bi-Sb-Zn system were characterized by microstructural SEM-EDS and optical microscopy analysis, Brinell hardness tests and electrical conductivity measurements. Isothermal cross section at 298 K was calculated using CALPHAD method and PANDAT 8.1 software package. The phases on calculated cross sections were found to be in a good agreement with experimentally determined phase compositions in analyzed microstructures

Effect of chemical composition on the microstructure, hardness and electrical conductivity profiles of the Ag-Bi-Ge Alloys

© 2019 Universidade Federal de Sao Carlos. All rights reserved. Microstructure, hardness and electrical properties of the selected ternary Ag-Bi-Ge alloys were investigated in this study. Isothermal sections of the Ag-Bi-Ge system at 25, 100 and 500 °C have been extrapolated using optimized thermodynamic parameters from literature and experimentally investigated. Performed experiments were optical microscopy, scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS), X-ray powder diffraction (XRD), hardness measurements by Brinell method and electrical conductivity measurements. EDS results were compared with predicted phase equilibria and good overall agreement between experimental and calculated values was obtained. XRD results were also in agreement with predicted phase equilibria. Hardness and electrical conductivity of selected alloys were measured and by using appropriated mathematical model these properties were predicted in the whole composition range