DIFFUSION BONDING OF REFRACTORY METALS
29 September 1962 - 28 December 1962
SOLAR TURBINES INTERNATIONAL SAN DIEGO CA
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Six concepts to actuate the diffusion bonding process were evaluated experimentally. Three of these - surface active elements, recrystallization of cold worked metal, and allotropic transformations - promote bonding. Small atom diffusion aids, acceleration of diffusion by a high frequency field, and bonding under subsolidus conditions are ineffective or inapplicable to refractory metal bonding. The magnitude of improvement of joints with intermediate foils that recrystallize or undergo allotropic transformation has been found to be small, whereas surface active elements produce a severalfold increase in bond strength.
- Inorganic Chemistry