Abstract：Taking Cu, Cr and C powder as raw material, Cu、Cr and C content was calculated according to Cr₃C₂ mass fraction of5%, Cu-Cr-C composite powders were prepared by mechanical alloying(MA). The phase, microstructure and element distribution of the powders during MA process were studied by XRD, SEM and EDS. The result shows that supersaturated solid solution alloy powder Cu-Cr-C can be prepared by MA. With the milling time increasing, the size of the alloy powders is refined and the morphology becomes to flake shape. After further milling,the new product Cr₃C₂ is observed, the trend of powder's refinement becomes slow gradually and the morphology changes from flake shape to globosity with agglomeration. It is concluded that the best milling time for in-situ formation of Cr₃C₂ is 30 hours of MA.

Keywords: mechanical alloying; in-situ formation; supersaturated solid solution