Electrodeposition of Dispersion-Hardened Nickel-Al[sub 2]O[sub 3] Alloys

alloys were electrodeposited from a Watt's‐type nickel‐electrolyte, which contained the second phase particles suspended in the solution. The effects of particle concentration, particle size, and plating conditions on microstructure and physical properties of the deposits were studied. Using submicroscopic particles, the room temperature yield strength increased from 8 kg/mm 2 for pure nickel to 35 kg/mm 2 for alloys containing 3.5–6.0 v/o (volume per cent) . It is believed that this increase was due to dispersion strengthening effects similar to those observed in sintered or internally oxidized metal‐metal oxide systems.