Effect of third element on properties of CuCr alloys produced by explosive compaction L U O S hou ji ng , L I Ji n pi ng , N IU Wei , HU Wei ye , GON G Zhao hui Abstract :The CuCr (the weight ratio of Cu and Cr was 1 :1) and CuCr + 5 % (mass fraction) M ( M = W , Fe) alloys powders were prepared by mechanical alloying . Then the CuCr contact materials for vacuum circuit breakers were made by explo