Method and system for recovering bond coat and barrier coat materials from overspray and articles

摘要

The disclosure relates generally to recovering bond coat materials and barrier coat materials from co-mingled mixtures of bond coat and barrier coat materials (e.g., plasma overspray waste), and from mixtures of co-mingled bond coat and barrier coat materials stripped from a substrate. The disclosure also relates to recovering rare earth elements (e.g., yttrium) from a barrier coat of the co-mingled plasma overspray waste or mixture of co-mingled bond coat and barrier coat materials stripped from the substrate.

主权项

1. A method for recovering bond coat and/or barrier coat materials, comprising:
applying one or more magnetic fields to a mixture comprising co-mingled bond coat and barrier coat materials under conditions effective to yield one or more paramagnetic fractions comprising a portion of the bond coat material and a diamagnetic fraction comprising a portion of the barrier coat material; subjecting the mixture to a first magnetic field under conditions effective to yield a first paramagnetic fraction comprising a paramagnetic bond coat oxide component and a paramagnetic-diamagnetic fraction comprising a paramagnetic bond coat component co-mingled with the diamagnetic barrier coat material; and subjecting the paramagnetic-diamagnetic fraction to a second magnetic field under conditions effective to separate the paramagnetic bond coat component from the diamagnetic barrier coat material; wherein said first magnetic field is weaker than said second magnetic field.