Influence of Ni and NiAu-plating on hydrogen binding behavior in Al-based SiC: a density functional theory investigation

Abstract This study investigates the influence of Ni and NiAu coatings on hydrogen binding behavior in Al-based SiC composites, critical for aerospace and electronic applications. Theoretical computations reveal distinct hydrogen migration patterns at Al/SiC, Ni/SiC, Ni/Al, and Ni/Au interfaces. Nickel plating directs hydrogen towards the coating, reducing accumulation at the SiC/Al interface. However, NiAu plating leads to hydrogen enrichment at the Ni/Au interface, necessitating dehydrogenation of the Ni layer prior to Au plating. Understanding these mechanisms is crucial for optimizing manufacturing processes and enhancing material reliability, durability, and performance in hydrogen-sensitive environments.