Diffusion bonding is a different technique for bonding metals together. This is often referred to as brazing, but with diffusion bonding no filler material or flux is added and the temperature remains up to 100°C below the melting temperature. The components are pressed together by mechanical pressure. The metal components that are joined only undergo microscopic deformation and the joining area is homogeneous. The surface must be cleaned in advance: for example, all surface oxides, oils and dirt must be removed.
Diffusion bonding (in combination with SPF) is mainly seen in the aerospace industry.
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