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Effects of rare earth Ce addition on microstructure and mechanical properties of impure copper containing Pb 被引量:11
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作者 Hai-hong LI Xiao LIU +5 位作者 Yang LI Shi-hong ZHANG Yan CHEN Song-wei WANG Jin-song LIU Jin-hu WU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2020年第6期1574-1581,共8页
The effects of rare earth Ce on the microstructure and mechanical properties of impure copper containing Pb were investigated using OM,SEM,EPMA,TEM and tensile testing.TEM and EDS analysis reveal that spherical CePb3 ... The effects of rare earth Ce on the microstructure and mechanical properties of impure copper containing Pb were investigated using OM,SEM,EPMA,TEM and tensile testing.TEM and EDS analysis reveal that spherical CePb3 particles form after Ce addition.CePb3 particles,with average size of^3.6μm,homogenously distribute in the Cu matrix.Due to small lattice misfit(~4.62%)with Cu matrix,CePb3 particles can act as effective nucleation sites beneficial to the grain refinement.Pb at grain boundaries seriously deteriorates the mechanical properties of Cu.The tensile strength and the elongation of Cu-0.1 Pb are decreased by 43.1%and 56.7%compared with those of pure copper,respectively.Ce can purify grain boundaries,cause the precipitation of CePb3 particles and refine grain sizes,which contribute to significant improvement of the mechanical properties of Cu.Compared with Cu-0.1Pb,the tensile strength(179 MPa)and the elongation(38.5%)of Cu-0.1Pb-0.3Ce are increased by 117.6%and 151.6%,respectively. 展开更多
关键词 Ce addition impure copper containing Pb cepb3 second phase particle lattice misfit grain refinement mechanical property
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