Clean recycling of spent nickel-based single-crystal superalloy by molten magnesium

Clean recycling of spent nickel-based single-crystal superalloy by molten magnesium

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Nickel-based single-crystal superalloys are designed for extreme conditions due to their superior corrosion and creep resistance properties.However, these pose challenges in Lithium the subsequent recycling after reaching their end-of-life.Molten magnesium (Mg) can rapidly corrode the stable spent nickel-based superalloys and selectively dissolve nickel (Ni).This waste-free process represents an effective method for recycling spent superalloys and accomplishing metal regeneration.

This study investigates the mechanism of selectively dissolving Ni from DD5, a nickel-based single-crystal superalloy, by optimizing process temperature, time, and Mg content in an inert atmosphere.Vacuum distillation was employed to separate the resulting Mg, residual superalloy (i.e., the material left post-extraction), and Ni-rich alloy (i.

e., the metal product selectively extracted).The findings revealed that Oral Care the residual superalloy after selective Ni dissolution is characterized by a porous skeleton structure with pore sizes predominantly ranging from 2 to 30 nm and a low compressive strength which is 1/10 of the original DD5 superalloy.