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Kovar (shown in Blue). Properties of Copper. Thermal Expansion of Copper. Thermal expansion of Molybdenum. TE=4.535 x 10 -6 per deg C at 400 C. Glass used with Kovar. Code 7070. Comparison of Filler Materials. Sn – Ag Solder Shear Strength= 2,700 psi Tensile Strength= 5,800 psi

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thermal expansion of molybdenum
Thermal expansion of Molybdenum

TE=4.535 x 10-6 per deg C at 400 C

comparison of filler materials
Comparison of Filler Materials
  • Sn – Ag Solder
  • Shear Strength= 2,700 psi
  • Tensile Strength= 5,800 psi
  • Expansion 30 PPM/oC
  • Liquidus 430 oF
  • Georo

Au - Ge Braze

  • Shear Strength= 26,825 psi
  • Tensile Strength= 26,835 psi
  • Young’s Modulus =10.55 x 106 psi
  • Expansion 13 PPM/oC
  • Liquidus 673 oF
  • Sn – Cu - Ag Solder
  • Shear Strength= 5,874 psi
  • Liquidus 423oF