The interpretation of the DSC signals of the lead-free solder alloy systems using the CALPHAD approach

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F09%3A00051152" target="_blank" >RIV/00216224:14310/09:00051152 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

čeština

Název v původním jazyce

The interpretation of the DSC signals of the lead-free solder alloy systems using the CALPHAD approach

Popis výsledku v původním jazyce

The knowledge of the phase diagrams and the predictions of the respective liquidus and solidus temperatures are of a great importance. In the present study, the heat flow differential scanning calorimetry (DSC) was used to describe the phase transformations in the lead-free solder systems Sn-Ag-Cu and Sn-Ag-Cu-X (X=Bi, In). We used the Neztsch STA CD/3/403/5/G instrument that enables for the detection of the DSC signal using the heating and cooling rates of down to 0.1 K/min. At these conditions, the samples could be considered to be in the state close to the thermodynamic equilibrium. The DSC heating signal of the materials consisted of two or more different overlapping peaks resulting from the precipitation of secondary phases. The equilibrium statecalculations were performed using the CALPHAD approach. The individual phases and their molar Gibbs energies were described by the parameters taken from the COST531 Thermodynamic Database of Lead-free Solders [1].

Název v anglickém jazyce

The interpretation of the DSC signals of the lead-free solder alloy systems using the CALPHAD approach

Popis výsledku anglicky

The knowledge of the phase diagrams and the predictions of the respective liquidus and solidus temperatures are of a great importance. In the present study, the heat flow differential scanning calorimetry (DSC) was used to describe the phase transformations in the lead-free solder systems Sn-Ag-Cu and Sn-Ag-Cu-X (X=Bi, In). We used the Neztsch STA CD/3/403/5/G instrument that enables for the detection of the DSC signal using the heating and cooling rates of down to 0.1 K/min. At these conditions, the samples could be considered to be in the state close to the thermodynamic equilibrium. The DSC heating signal of the materials consisted of two or more different overlapping peaks resulting from the precipitation of secondary phases. The equilibrium statecalculations were performed using the CALPHAD approach. The individual phases and their molar Gibbs energies were described by the parameters taken from the COST531 Thermodynamic Database of Lead-free Solders [1].

Druh

O - Ostatní výsledky

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/OC09010" target="_blank" >OC09010: Studium termodynamických vlastností a fázových diagramů soustav pro vysokoteplotní bezolovnaté pájky</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2009

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů