Microstructure evolution in nanocrystalline Cu-Nb alloy during mechanical alloying
The microstructural evolution of nanocrystalline Cu-10％Nb(mass fraction) alloy during mechanical alloying (MA) was investigated by using X-ray diffraction,optical microscopy(OM),scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observation.Upon milling of Cu-Nb powders with coarse grains,the grain size is found to decrease gradually with lengthening milling time,and reach the minimum value (about 9 nm) after 100 h milling.The microstrain and the microhardness of the powders increase during the grain refinement.And Cu lattice parameter increases steadily over 100 h milling.The mechanisms of solid solution extension during milling were discussed.The results show that up to 10％Nb can be brought into solid solution by MA.The extension of solid solution is found to relate closely with the formation of nanocrystalline.
mechanical alloying nanocrystalline material Cu-Nb alloy microstructure
LEI Ruo-shan WANG Ming-pu GUO Ming-xing LI Zhou DONG Qi-yi
School of Materials Science and Engineering,Central South University,Changsha 410083,China
国际会议
2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)
长沙
英文
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）