Prezentace aplikace PowerPoint

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Thermodynamic and Phase Diagram Studies
of Systems for
High Temperature Lead-Free Solders
Pavel Bro
Masaryk University, Faculty of Science, Brno,
Czech Republic Department Chemistry
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Expressions of Interest

• Members of the team
• Staff Pavel Bro, Jirí Sopouek, Jan Vretál
• Students Katerina Hajdová,..
• Project topic
• Extension of the knowledge on lead free solders
  convenient for high temperature applications at
  the level of basic and applied research
• - theoretical studies - TD modelling (CALPHAD
  approach)
• - experimental investigations on TD properties
  (calorimetry - TGA-DSC/DTA gt
  enthalpies, heat capacities) (partial pressures
  - DSC/KC/MS gt activities, TD functions)
• Proposed systems Zn-Al-X (X Mg, Ni, Sb, Sn)

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Thermodynamic modelling

• TD database - for lead free solders - output of
  COST 531 action
• Software - ThermoCalc
• - MTDATA
• - DICTRA

- Thermodynamic database of the phase diagrams
in the Mg-Al-Zn-Y-Ce system Liu X. J. et
al., Rare Metals 25 (5), 2007, 441-447
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Experimental studies

• Calorimetry - Thermogravimetry analysis (TGA)
• - Diferential scanning calorimetry (DSC)
• - Diferential thermal analysis (DTA)
• (Netzsch - STA 449C )
• Activity
• measurement

- DSC coupled with Knudsen cell and a
quadrupole mass spectrometer (DSC/KC/MS)
(Netzsch - DSC 409 CD/3/5/G ) will be
delivered in X/2007
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Welcome cooperation

• Thermodynamic modelling
• - exchange of thermodynamic data
• Thermodynamic and phase data measurements data
  unavailable in our laboratory - structure
  analyses (phase data)- EMF measurements (TD
  data) - other convenient data - possible
  exchange of experimental samples