MP0602 Thermodynamic Database

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MP0602 Thermodynamic Database

• Alan Dinsdale
• NPL Materials Centre
• National Physical Laboratory
• Teddington, UK

MP0602 Joint Working Group Meeting, Brno 27-28
August 2007
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COST531 database

• SGTE unary database v4.4
• Binary data (critically assessed) from
• SGTE/NPL solders database
• Brno solders database
• Literature
• Data generated within COST531
• Test for consistency/compatibility
• MTDATA
• ThermoCalc
• Pandat

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COST531 database managed by

• Ale Kroupa
• Jan Vretál
• Adéla Zemanová
• Jirí Vízdal
• Andy Watson
• Alan Dinsdale
• MP0602 thermodynamic database will continue to
  be managed by this group

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Current status of the COST531 database

• Scope 11 elements
• Ag, Au, Bi, Cu, In, Ni, Pb, Pd, Sb, Sn, Zn
• Binary systems All 55 binary systems except
• Ni-Sb and Pd-Sb
• Selected ternary systems
• Ag-Au-Bi, Ag-Au-Sb, Ag-Bi-Sn, Ag-Cu-Ni, Ag-Cu-Pb,
  
• Ag-Cu-Sn, Ag-In-Sn, Ag-Ni-Sn
• Au-Bi-Sb, Au-In-Sb, Au-In-Sn, Au-Ni-Sn
• Bi-In-Sn, Bi-Sb-Sn, Bi-Sn-Zn
• Cu-In-Sn, Cu-Ni-Pb, Cu-Ni-Sn
• In-Sb-Sn, In-Sn-Zn

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The Atlas

• The Atlas of lead free solders phase Diagrams
  is under construction, to be published Autumn
  2007 . based on the data in the COST531 database

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What do we mean by critical assessment ?

• Critical assessment is a process to generate a
  set of reliable data or diagrams which are self
  consistent and represent all the available
  experimental data for the system eg phase
  diagram, enthalpies of mixing, vapour pressures,
  
• It involves a critical analysis of the
  experimental data (Hultgren, Massalski etc)
• .. followed by a computer based optimisation
  process to reduce the experimental data into a
  small number of model parameters
• .. using rigorous theoretical basis underlying
  thermodynamics

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Database for MP0602

• Will use the COST531 database as its basis
• Updated as new critically assessed data become
  available
• Addition of
• P (to allow for modelling of interface between
  solder and electroless Ni contacts)
• Al, Mg (for Zn-Al based high temperature solders)
• Ge, Ga (for Zn-Al based high temperature solders)
• Ti, Co (some indication that these may be useful)
• In will be still be in database but not thought
  to useful for high temperature solders

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What is available new binary systems

• All Al containing binary systems
• Al-Sn, Al-Zn, Al-Mg .. except (Al-Pd)
• Most Mg containing binary systems
• except Au-Mg, Bi-Mg, Co-Mg, Ge-Mg, Mg-P,
• Mg-Pb, Mg-Pd, Mg-Sb
• Most Ge containing binary systems
• except Ge-Mg, Ge-Ni, Ge-P, Ge-Pd
• Most Ga containing binary systems
• except Ag-Ga, Au-Ga, Cu-Ga, Ga-Pd
• Limited P containing systems
• Ni-P and Sn-P (currently being assessed in
  Vienna)
• Al-P, Ga-P, P-Sb are OK
• Other binary systems require assessment or
  revision

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What is available ternary systems

• Zn-Al with Cu, Mg, Sn
• Sn-Sb with Bi, (In)
• Ag-Bi with Au, Sn
• Au-Sn with Ni
• Zn-Sn with Bi
• Other assessments are available in literature
  but will require validation and modification

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Priority systems

• Ag-Cu-Ni-P-Sn (part of GP on interfacial
  reactions ?)
• Ni-P, Sn-P (experiments and assessment underway
  in Vienna)
• Other P containing binary systems
• Remaining ternary and quaternary systems
• Zn-Al-X
• (Al-Pd), Zn-Al-Ni, (Zn-Al-Ga), Zn-Al-Ge,
  Zn-Al-Cu-Ni, Ge-Ni, Ge-P, Ge-Mg, Mg-P, Mg-Pb,
  Mg-Pd
• Sn-Sb-X
• Ni-Sb, Pd-Sb (assessments underway in Brno)
• Ni-Sb-Sn, (Ag-Sb-Sn), Au-Sb-Sn, Cu-Sb-Sn,
  Sb-Sn-Zn
• Co and Ti in solders
• Co-Cu-Sn, Bi-Co, Co-Cu-Ti, Bi-Ti
• Bi-Ag-X
• Bi-Ag-Ni, Bi-Ag-Cu
• Zn-Sn-X
• Zn-Sn-Ni

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Related database activities within Action

• Surface tension database
• Surface energy database
• Chemical diffusion (mobility) database
• Volume (density) database ?

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Please !

• Let us know of any assessment work you are
  involved in. It helps us to avoid duplication of
  effort.