| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1603831 | International Journal of Refractory Metals and Hard Materials | 2012 | 5 Pages |
CuW–La2O3 composites were fabricated using an in-situ synthesis. The breakdown voltage in vacuum, moving trajectory of cathode spots, electrical conductivity, and hardness of CuW–La2O3 composites were carefully examined. The microstructures were characterized by a scanning electron microscope (SEM). The results show that CuW–La2O3 composites have the maximum hardness of 220HB and the electrical conductivity of 45% IACS when the content of La2O3 is 0.75 wt.%. In comparison with CuW alloy, the dielectric strength, arc life and the arc mobility of the CuW–La2O3 composites increased by 36.9%, 9.7% and 46.6%, respectively. As a result, the addition of La2O3 is useful to improve the properties of CuW alloys and the in situ synthesized CuW–La2O3 composites should have excellent arc erosion resistance.
►CuW–La2O3 composites were fabricated by in-situ synthesis and infiltration. ►Fine La2O3 particles uniformly distributed in CuW matrix. ►CuW–La2O3 composites have excellent arc erosion resistance.
