Diffusion bonding technique concerning production of microchannel heat exchangers

Diffusion bonding process of aluminium 1070A concerning production of microchannel heat exchangers (MCHE) has been investigated. It has been proposed to raise manufacturability of the process owing to introduction into contact zone of joining details composition on the basis of sodium silicate before welding. The results of investigations of microstructure and chemical composition of welded joints and also mechanical strength of products have been presented.