Study on the Electrical Arc Ablation Performance of Nano-SiC_W Reinforced Cu-Matrix Composites

Abstract:

The nano-SiC whisker reinforced Cu-matrix composites (SiCw/Cu) were obtained by powder metallurgy processes. The electrical arc ablation performance of composite SiCw/Cu was compared with copper H62 through stagnation-point ablation experiments. The results indicated that the qualities of copper H62 samples decreased with the increasing of ablating current; and the qualities of SiCw/Cu samples firstly increased and then decreased with the increasing of ablating current. Ablation mechanism research indicates the ablation hole of SiCw/Cu is smaller than copper H62, but it produced micro cracks because of different thermal expansion coefficients between nano-SiC whisker and Cu-matrix. At the same time, nano-SiC whisker happens to intricate oxidation reaction during arc ablation, it can reduce Cu-matrix smelts and sprays by absorbing arc energy. The anchoring effect and protection for the copper matrix of the uniformly dispersing nano-SiC whiskers have been considered to contribute the excellent arc ablation performance of composite SiCw/Cu.

• Periodical: Advanced Materials Research (Volumes 228-229)
• Pages: 509-513
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.228-229.509
• Online since: April 2011
• Authors: Gui Min Liu, Bin Li
• Keywords: Arc Ablation, Cu Matrix Composites, Nano-SiC Whisker

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