A study on the production and mechanical behavior of nanocrystalline nickel-phosphorous electrodeposits.

摘要

The mechanical properties of nanocrystalline Ni-P electrodeposits are investigated in this study. Peak hardness and the transition from a traditional to an inverse Hall-Petch relationship is observed in nanocrystalline Ni-P at a grain diameter of approximately 7 nm. This transition was observed in deposits produced using three distinct plating current densities (10 A/dm;The mechanical behavior of the Ni-P electrodeposit with peak hardness was also examined in tension and compression. The changes in the modulus of elasticity were insignificant when comparing the results from the nanocrystalline material with accepted values for its crystalline counterpart. This is contrary to results reported for gas-condensed nanocrystalline materials. It is proposed that this is due to the pore-free structure of electrodeposited Ni-P.;The feasibility of producing thick, flat nanocrystalline Ni-P electrodeposits was also examined. By altering the initial plating parameters (temperature 80