Journal
VACUUM
Volume 177, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.vacuum.2020.109423
Keywords
W-Cu composite; Tungsten carbide; Microstructure; Mechanical properties; Vacuum arc erosion resistance
Funding
- National Natural Science Foundation of China [51801151, 51631002]
- Key Research and Development Project of Shaanxi Province [2019ZDLGY05-07, 2017ZDXM-GY-033]
Ask authors/readers for more resources
W-Cu composites that are strengthened with tungsten carbide ceramic particles have been proposed thanks to their high melting point, high hardness and excellent high-temperature mechanical properties. In this paper, tungsten carbide-reinforced W-25 wt% Cu composites were fabricated via an in situ synthesis technique that used mixed tungsten, copper and graphite powders. The impact of the graphite content on the microstructure and properties of the W-Cu composite was investigated. The results showed that tungsten carbide phases formed through the carbonization reaction of tungsten and graphite at high temperature. With the generation of tungsten carbide phases, the hardness, vacuum arc erosion resistance, high-temperature strength and wear resistance of the W-Cu composites were improved. The improvement was very significant for the W-Cu composites with an increase in the graphite content. However, the electrical conductivity was slightly sacrificed for the W-Cu composites. Moreover, the effects of the graphite on the comprehensive properties were evaluated and compared with those of reinforced with CNTs. Based on the laboratory properties and preparation cost of W-Cu composites, graphite can be used for the industrial fabrication of in situ self-generated tungsten carbide-reinforced W-Cu composites.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available