J. Phys. IV France 7 (1997) C2-1247-C2-1248
Structural Transformation of Immiscible Metals Induced by Mechanical AlloyingS. Wei1, L. Yuan1, W. Liu1, K.Q. Lu2 and Y. Yang3
1 Center for Fundamental Physics, and Hefei Synchrotron Radiation Laboratory, University of Science & Technology of China, Hefei 230026, P.R. China
2 Institute of Physics, Chinese Academy of Science, Beijing, 100080, P.R. China
3 Institute of Solid State Physics, Chinese Academy of Science, Hefei 230031, P.R. China
X-ray absorption fine structure(XAFS) is used to investigate the local structural change of Fe60Cu40 and Fe80Cu20 with the ball milling time. The XAFS results verify that the solid solution of mechanically alloyed Fe-Cu samples are inhomogeneous. We propose that the bcc to fcc structural transformation of Fe small particles of Fe60Cu40(160h) is induced by interfacial Cu atoms dissolving in small Fe grain boundary during the mechanical alloying process.
© EDP Sciences 1997