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Over the last decade electrodeposited nanocrystalline electrodeposited nanocrystals with ordinary crystals do not have excellent properties such as wear resistance , ductility , hardness , resistance , and electrochemical properties and corrosion resistance , and manufacturing electrodeposited nanocrystals is relatively easy , and thus its prospects for the application of science and technology is very broad . This article Select the DC deposition method to prepare nanocrystalline copper , pH, additives, current density of deposition effects , and then proceed to the tensile test , the size of the study strain rate on tensile properties . Experimental results : as the electrolyte pH value increases , the electro-deposition rate decline , rising levels of deposited copper layer (200 ) preferred orientation of the crystal surface , the grain size decreases ; SeO2 as the deposition of nano- additives on DC the Cu surface morphology, microstructure and hardness was found , added 0.02g / L additives can sedimentary surface smooth and dense , deposited Cu layer (111) preferred orientation to increased grain size decreases to 28nm, the microhardness was raised HV277; as the current density increases , the deposition rate increased significantly , and the current efficiency decreases , when the current density of 3.2A/dm2 obtained bright surface densified deposited layer , the average grain size uniaxial tensile test room temperature , the average grain size of 56nm nano copper 24nm, and has the ( 111) texture , microhardness of nano - copper up to HV297, approximately blister copper hardness six times ; , found the strength and toughness of the nano- copper with strain rate increasing, especially sensitive to the rate of the toughness is very significant .
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