Electroless deposition of amorphous Ni-Re-P alloys from acidic hypophophite solutions

摘要

Amorphous Ni-Re-P alloys of varying composition (at. percent rhenium 0.0-3.5 percent) were prepared using electroless deposition from acidic solutions of Ni~(2 +), perrhenate, hypophosphite and succinic acid/ succinate. A pH of 4.5 produced deposits more readily than other pH values. All of the alloys prepared in this study were amorphous and the crystallization temperatures of the alloys increased with increasing rhenium (decreasing phosphorus) composition. The composition of each alloy was determined using microprobe analysis and varies as a function of solution composition. The mole ratio of rhenium to nickel in the alloys is approximately one half the value for that ratio in the solution from which it is deposited.