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Production of low cost Cu-based metallic glasses from recycled Cu

Metallic glasses have a large scientific and industrial interest. Since the production of the first metallic amorphous ribbons by fast undercooling a large number of amorphous metallic alloys have been produced by using several methods. Bulk metallic glasses (BMG) are defined as amorphous metallic alloys that can be obtained with characteristic dimensions of millimetre or larger. Since the late 1980's a large amount of BMG alloys have been reported, based in almost all metals with technological interest. The non-conventional mechanical properties of BMG, such as high strength to density ratios and very high restitution coefficients during elastic deformation combined with the possibility of producing relatively large parts and complex characteristics by mould casting make BMG highly promising materials for industrial use. Cu-based metallic glasses are of high interest, as they show better mechanical properties than crystalline alloys with similar compositions. The research group of the student has already established a collaboration with one of the most important Spanish companies of Cu production, La Farga Group. La Farga is leader in Cu recycling, and is at present supplying high value Cu products, mostly for power applications. The aim of this project is to explore the possibility of producing binary Cu-Zr metallic glasses using residual Cu supplied by La Farga that has several degrees of impurity (up to 13%). The exit of the project will imply, on the one hand, the possibility of producing metallic glasses without using high purity elements, thus reducing their cost and, on the other hand, the possibility for La Farga to obtain profit from residual Cu that nowadays has no use.