Microstructure and Property Evolution of Cu90Zr10 Alloy in the Process of Mechanical Alloying

C.J. Li; L. Teng; J. Tan; Q. Yuan; J.J. Tang; T.L. Chen; Xin Kun Zhu

doi:10.4028/www.scientific.net/AMR.750-752.667

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Microstructure and Property Evolution of Cu90Zr10 Alloy in the Process of Mechanical Alloying

Abstract:

Cu90Zr10 alloy powder was prepared by high-energy ball milling. The microstructure and property evolution of this alloy powder during mechanical alloying (MA) were investigated by using X-ray diffraction and optical microscopy (OM). The alloy powder with an average grain size of 10 - 40 nm was obtained, and the grain size was found to decrease gradually with increasing milling time. The microhardness reached a maximum value (about 295 Hv) after 30 h milling. The internal microstrain and the microhardness of the samples increased due to the grain refinement and solid solution during milling, and 10at.% Zr could be brought into Cu lattice by solid solution during MA. At last, the mechanisms of strengthening were discussed.