2010•Cailiao rechuli xuebaoRequires access
Effect of trace nano-copper on the density of Fe-base powder metallurgy parts
Xiaoyu Zhang
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Abstract
Fe-base powder with different content of nano-copper powder were mixed with a high energy ball mill,and the powder compact samples were prepared under pressure of 750 MPa,and then sintered at 920 ℃ for 6 hours.The density,microstructure and hardness of the samples were examined by means of SEM,XRD,TEM and handness test.The results show that density of the tested materials increased obviously with increasing of the content of nano-copper.The density of the samples after sintering is 6.6 g /cm3 (without nano-copper powder) and 7.3 g /cm3 (containing 3.0% nano-copper powder),respectively.The porosity ratio of the tested sample containing 3.0% nano-copper reduced obviously and it hardness increasd compared with the sample without nano-copper.The hardness of the samples is improved due to the addition of nano-copper powder,that is ascribed to the increased of density of the Fe-based powder metallurgy part.