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1
Content available Structural disordering in Sn-Pb(Bi) eutectic melts induced by heating
Mudry S., Shtablavyi I., Shevernoga I.
Polish Journal of Chemical Technology
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2013
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Vol. 15, nr 3
61-64
EN
The structure of liquid Sn0.739Pb0.261 and Sn0.57Bi0.43 eutectic alloys was studied by means of X-ray diffraction at several temperatures. Structure factors, pair correlation functions and the main structural parameters obtained on their basis were analyzed. We show that the structure of the Sn0.739Pb0.261 and Sn0.57Bi0.43 eutectic alloys is inhomogeneous and consists of different types of clusters. Upon heating the cluster structure undergoes topological and chemical disordering showing a significant dependence of structural parameters on temperature near the melting point.
2
Content available remote Determination of the thermodynamic properties of liquid Ag-Sb-Sn system by equilibrium saturation method
Romanowska J., Bencze L
Journal of Achievements in Materials and Manufacturing Engineering
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2011
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Vol. 48, nr 1
41--51
EN
Purpose: The interaction of lead-free solders with a copper substrate is an essential issue for the reliability of solder joints. In order to understand this interaction, the knowledge of thermodynamic and other physical properties of several ternary systems such as Ag-Sb-Sn system is necessary. The aim of this work was to determine the activities of all components in Ag-Sb-Sn alloy. Design/methodology/approach: The investigation of this system was carried out using the equilibrium saturation (ES) method. The ES measurements were performed at 1273, 1373 and 1473 K. As the latter method is a comparative one, a Sn-Sb alloy was accepted as a reference alloy, where a formula for the Sb activity proposed by Jonsson and verified by Vassiliev was accepted. Findings: In the frame of the presented experiments the activity of Sb was determined by ES method. Research limitations/implications: The activity of Sb was obtained by ES and fitted to the Redlich-Kister-Muggianu (RKM) model. Practical implications: A knowledge of multi-component phase equilibrium can provide the alloy developer with specific data enabling finding alloys that meet certain criteria. Phase diagrams are built on the basis of experimental data and the reliability of phase diagrams depends on the reliability of the experimental data used for the optimisation. Hence it is advantageous to use various source of data obtained by several methods and when the data of different source agree (like the ones presented in this paper) it proves their reliability. Data presented in this paper will be used for Ag-Sb-Sn phase diagram optimisation in the frame of the COST Action MP0602. Originality/value: Sb activity values in Ag-Sb-Sn alloys obtained by ES and activity values of Sb, Ag and Sn calculated using the RKM model.
3
Content available Experimental study on thermodynamics of the Bi-Cu-Sn system
Romanowska J.
Archives of Metallurgy and Materials
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2011
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Vol. 56, iss. 1
87-91
EN
Bismuth thermodynamic activities in Bi-Cu-Sn liquid alloys were measured by means of the vapour saturation method at 1373K, 1423K and 1473K. These results were coupled with literature data for binary systems Bi-Cu, Bi-Sn and Cu-Sn in order to obtain a thermodynamic description of the ternary liquid by use of the geometrical Muggianu approach.
PL
Metodą równowagowego nasycania wyznaczono aktywność bizmutu w stopach Bi-Cu-Sn w temperaturze 1373, 1423 I 1473K. Na podstawie uzyskanych wyników i danych literaturowych dotyczących stopów dwuskładnikowych Bi-Cu, Bi-Sn i Cu-Sn i stosując model Muggianu uzyskano opis termodynamiczny ciekłego stopu trójskładnikowego.
4
Content available remote Thermodynamic properties of liquid Cu-Sb-Sn alloys by equilibrium saturation and Knudsen effusion mass spectrometric methods
Romanowska J.
Archives of Materials Science and Engineering
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2009
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Vol. 39, nr 2
69-74
EN
Purpose: The interaction of lead-free solders with a copper substrate is an essential issue for the reliability of solder joints. In order to understand this interaction, knowledge of thermodynamic and other physical properties of several Cu-containing ternary systems such as Cu-Sb-Sn system is necessary. The aim of this work was to determine Sb activity in Cu-Sb-Sn alloy. Design/methodology/approach: Investigation of this system was carried out using the equilibrium saturation (ES) method and Knudsen effusion mass spectrometry (KEMS). The ES measurements were performed in 1373 K temperature. As the latter method is comparative one, a Sn-Sb alloy was accepted as a reference alloy, where a formula for Sb activity proposed by Jönsson and verified by Vassiliev was accepted. The Sb activity measurements by KEMS method were performed in a temperature range from 793 to 1323 K. Findings: In the frame of presented experiments, Sb activity was determined by ES and KEMS methods. Research limitations/implications: The Sb activities obtained by ES and KEMS agree well - Sb(KEMS)/Sb(ES) = 1.04 š 0.14. Practical implications: Knowledge of multi-component phase equilibrium can provide the alloy designer with specific data enabling finding alloys that meet certain criteria. Originality/value: The measured activity of antimony in the Cu-Sb-Sn alloys both by ES and KEMS method are comparable and they will be used for phase equilibria calculations of the Cu-Sb-Sn system.
5
Content available remote The stress of machine parts for pressure die casting and dies that are in contact with liquid metal influencing their service life
Ružbarský J.
Archives of Foundry Engineering
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2008
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Vol. 8, iss. 2
180-182
EN
Stress of material surface at die, pressing sleeve and piston in pressure die casting process from liquid alloys is analysed. That is heat fatigue and heat and chemical effect of liquid alloys. The measures for service life of mentioned parts are choose of material, lubricants and using equipment for control of die temperature.
6
Structure of tin-based alloys
Mudry S., Lutsyshyn T.
Prace Naukowe. Chemia / Wyższa Szkoła Pedagogiczna w Częstochowie
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2003
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Vol. 8
77--81
EN
Short range order of CuxSn1-x liquid alloys, containing 0; 2.5; 5; 7.5; 10 and 12.5 at.% Cu has been studied by means of x-ray scattering method. The structure factors and binary correlation functions are analyzed. It is shown that Sn-enriched liquid alloys can be considered as atomic solutions, where Cu-atoms substitude tin-ones. Structural inhomogeneities of liquid tin persist with increasing of copper content.
7
Viscosity of the lead-tin liquid alloys
Gąsior W., Moser Z., Pstruś J., Kucharski M.
Archives of Metallurgy
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2001
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Vol. 46, iss. 1
23-32
EN
The capillary method was used in the measurements of the viscosity of the lead-tin liquid alloys.
PL
Stosując metodę kapilarną zmierzono lepkość ciekłych stopów ołów-cyna.
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