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has been cited by the following article:

• TITLE: Electrical Conductivity of Spark Plasma Sintered W-Cu and Mo-Cu Composites for Electrical Contact Applications

  AUTHORS: N. I. Amalu, B. A. Okorie, J. C. Ugwuoke, C. S. Obayi

  KEYWORDS: Sintering, Infiltration, Conductivity, Porosity, Spark Plasma, Electrical Contact, Relative Density

  JOURNAL NAME: Journal of Minerals and Materials Characterization and Engineering, Vol.9 No.1, January 18, 2021

  ABSTRACT: Tungsten copper and molybdenum copper composites, with weight percent copper in the range of 20% - 40%, have been produced using the spark plasma sintering (SPS) technique. Other specimens having similar compositions were also developed using the conventional techniques of Liquid Phase Sintering (LPS) and Infiltration. Electrical conductivity measurements showed that the specimens produced by the SPS process had substantially higher levels of electrical conductivity than those produced by the other methods. Relative density measurements showed that the SPS specimens achieved very high densification, with relative densities in the range of 99.1% - 100%. On the other hand, the specimens produced by LPS and infiltration had relative densities in the range of 88% - 92% and 96% - 98% respectively. The superior conductivity of the SPS specimens has been attributed to the virtually full densification achieved by the process. The effect of porosity on electrical conductivity has been discussed and three standard models were assessed using results from porous sintered skeletons of pure tungsten and pure molybdenum.