Abstract: The CuCr alloy powders (the mass ratio was 1∶1) were made by mechanical alloying, then CuCr alloys for the vacuum breaker were aprepared by explosive sintering. The effect of the technology parameters on the characteristics of the CuCr contact materials was studied. The results show that CuCr contact materials with higher density (>7.398 g/mm3), higher rigidity (>HB144) and lower conductance (106 kS/m) can be made by the process; grinding time has important effect on the characteristics of CuCr alloy, the longer the grinding time is, the higher the density and the rigidity of the CuCr alloy is, and the lower the conductance of the CuCr alloy is. The effect of the explosive density on the characteristics of CuCr alloys is not obvious; when the ratio of explosive to powder or the ratio of explosive to powder and tube is too large or too low, the characteristics of the CuCr alloys are deteriorated.
Characteristics of CuCr contact materials made by explosive sintering
Abstract:
The CuCr alloy powders (the mass ratio was 1∶1) were made by mechanical alloying, then CuCr alloys for the vacuum breaker were aprepared by explosive sintering. The effect of the technology parameters on the characteristics of the CuCr contact materials was studied. The results show that CuCr contact materials with higher density (>7.398?g/mm 3) , higher rigidity (>HB144) and lower conductance (106?kS/m) can be made by the process; grinding time has important effect on the characteristics of CuCr alloy, the longer the grinding time is, the higher the density and the rigidity of the CuCr alloy is, and the lower the conductance of the CuCr alloy is. The effect of the explosive density on the characteristics of CuCr alloys is not obvious; when the ratio of explosive to powder or the ratio of explosive to powder and tube is too large or too low, the characteristics of the CuCr alloys are deteriorated.