Interface development in sintering of roll bonded metal laminates

Publisher:
Trans Tech Publications
Publication Type:
Journal Article
Citation:
Solid State Phenomena, 2006, 118 (1), pp. 437 - 442
Issue Date:
2006-01
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Metal laminates have experienced rapid development in many engineering applications and generally possess enhanced properties with improved service performance. Roll bonding is a major technique used in manufacture of metal laminates. This paper is to investigate the effects of atomic diffusion on the interface development of roll bonded metal laminates in the sintering heat treatment process. Copper/aluminium bi-metal laminates were prepared by roll bonding at 430C with a 40% rolling reduction in a single pass. Sintering was then applied at 450C for various periods. it was found that multi-phase interfacial layers developed in the sintering process and shofted towards the aluminium metal with increasing sintering time. Composition profiles of the metallic elements were carefully determined acorss the interfacial area of the bonded material. Interdiffusion coefficients of the metallic elements were determined using Boltzmann-Matano analysis. The results were correlated with the multi-phase development in the interfacial area.
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