| Abstract: |
The manufacturing of similar and dissimilar joints of advanced materials by diffusion bonding is driven by process control and surface engineering. In order to avoid any regeneration of oxide layers and improve the diffusivity during diffusion bonding, a unique concept for in-line surface treatment and diffusion bonding was developed. A diffusion bonding chamber coupled to a glove box, to treat specimens and transfer samples under inert atmosphere was established. Surface treatments included for example grinding, milling and different chemical treatments. Results have shown that surface treatments strongly influence topography, microstructure and therefore free energy. Improved joint properties can be achieved or bonding temperature for temperature sensitive materials can be significantly reduced applying this in-line technology. Joining strategies for various metals and dissimilar combinations, such as Cu-Cu, Al-Al, Al-Mg, Al-stainless steel, Ti-Al and Ti-stainless steel are presented.
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