Fabrication of Cu-W Nanocomposites by Integration of Self-Propagating High-Temperature Synthesis and Hot Explosive Consolidation Technologies

Authors

  • S. V. Aydinyan Yerevan State University, A. Manukyan str., 1, Yerevan, 0025, Armenia
  • H. V. Kirakosyan A.B. Nalbandyan Institute of Chemical Physics NAS RA, P. Sevak str., 5/2, Yerevan, 0014, Armenia
  • M. K. Zakaryan Yerevan State University, A. Manukyan str., 1, Yerevan, 0025, Armenia; A.B. Nalbandyan Institute of Chemical Physics NAS RA, P. Sevak str., 5/2, Yerevan, 0014, Armenia
  • L. S. Abovyan A.B. Nalbandyan Institute of Chemical Physics NAS RA, P. Sevak str., 5/2, Yerevan, 0014, Armenia
  • S. L. Kharatyan Yerevan State University, A. Manukyan str., 1, Yerevan, 0025, Armenia; A.B. Nalbandyan Institute of Chemical Physics NAS RA, P. Sevak str., 5/2, Yerevan, 0014, Armenia
  • A. Peikrishvili Tsulukidze Institute of Mining and Technology, E. Mindeli str., 7, Tbilisi, 0186, Georgia; F.Tavadze Institute of Metallurgy and Materials Science, E. Mindeli str., 10, Tbilisi, 0186, Georgia
  • G. Mamniashvili Andronikashvili Institute of Physics, Tamarashvili St., 6, Tbilisi, 0186, Georgia
  • B. Godibadze Tsulukidze Institute of Mining and Technology, E. Mindeli str., 7, Tbilisi, 0186, Georgia
  • E. Sh. Chagelishvili Tsulukidze Institute of Mining and Technology, E. Mindeli str., 7, Tbilisi, 0186, Georgia
  • D. R. Lesuer Lawrence Livermore National Laboratory, East Ave., 7000, Livermore, CA 94550-9234, USA
  • M. Gutierrez Tecnalia Research Institute, Mikeletegi Paselekua 1-3, San Sebastian, 20009, Spain

DOI:

https://doi.org/10.18321/ectj763

Keywords:

tungsten-copper nanocomposite, SHS, hot explosive consolidation, microhardness, mechanical properties

Abstract

Manufacturing W-Cu composite nanopowders was performed via joint reduction of CuO and WO3 oxides with various ratios (W:Cu = 2:1, 1:1, 1:3, 1:13.5) using combined Mg–C reducer. Combustion synthesis was used to synthesize homogeneous composite powders of W-Cu and hot explosive consolidation (HEC) technique was utilized to fabricate dense compacts from ultrafine structured W-Cu powders. Compact samples obtained from nanometer sized SHS powders demonstrated weak relation between the susceptibility and the applied magnetic field in comparison with the W and Cu containing micrometer grain size of metals. The density, microstructural uniformity and mechanical properties of SHS&HEC prepared samples were also evaluated. Internal friction (Q-1) and Young modulus (E) of fabricated composites studied for all samples indicated that the temperature 1000 °С is optimal for full annealing of microscopic defects of structure and internal stresses. Improved characteristics for Young modulus and internal friction were obtained for the W:Cu = 1:13.5 composite. According to microhardness measurement results, W-Cu nanopowders obtained by SHS method and compacted by HEC technology were characterized by enhanced (up to 85%) microhardness.

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Published

2018-12-21

How to Cite

Aydinyan, S. V., Kirakosyan, H. V., Zakaryan, M. K., Abovyan, L. S., Kharatyan, S. L., Peikrishvili, A., … Gutierrez, M. (2018). Fabrication of Cu-W Nanocomposites by Integration of Self-Propagating High-Temperature Synthesis and Hot Explosive Consolidation Technologies. Eurasian Chemico-Technological Journal, 20(4), 301–309. https://doi.org/10.18321/ectj763

Issue

Vol. 20 No. 4 (2018)

Section

Articles

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