Interatomic bonds may be established by bringing atoms of two surfaces in close enough proximity to assure adhesion. Relative moment of the surfaces under pressure and controlled roughness are helpful in breaking through surface films. While theoretically no pressure would be required for bonding, in practice a certain normal pressure is necessary to assure conformity with the contacting surfaces. In principle, however, any material can be bonded and solid state bonding is often applied when other technique fails.
SOLID STATE WELDING METHODS
Solid State Welding Includes :
(1) Friction welding
(2) Ultrasonic welding and
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