Abstract
The co-deposited behavior was investigated under varied bath compositions and current densities from Watt Ni plating bath containing Al and A1<TEX>$_2$</TEX>O<TEX>$_3$</TEX>powders. For single-particle bath, Al and A1<TEX>$_2$</TEX>O<TEX>$_3$</TEX>particles were agglomerated. The area percentage of A1<TEX>$_2$</TEX>O<TEX>$_3$</TEX>on plating surface decreased with increasing the current density, while that of Al on plating surface increased. On the other hand, in case of double-particle bath with 1.25g/<TEX>$\ell$</TEX> of Al and 5.0g/<TEX>$\ell$</TEX> of A1<TEX>$_2$</TEX>O<TEX>$_3$</TEX>5g, the area percentage of Ni-Al-A1<TEX>$_2$</TEX>O<TEX>$_3$</TEX>increased with increasing current density and the surface morphology was fine without agglomeration. Intermetallic compounds such as <TEX>$\gamma$</TEX>'and <TEX>$\gamma$</TEX>+<TEX>$\gamma$</TEX>' phases appeared when the co-deposited film was annealed.
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