Fabrication of Cu-W nanocomposites by integration of self-propagating high-temperature synthesis and hot explosive consolidation technologies

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URI: https://hdl.handle.net/11556/4321
ISSN: 1562-3920
DOI: 10.18321/ectj763
Publication date
2018
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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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Publisher Copyright: © 2018 Al-Farabi Kazakh National University.
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Hot explosive consolidation , Mechanical properties , Microhardness , SHS , Tungsten-copper nanocomposite , General Chemistry , General Chemical Engineering , General Materials Science , Condensed Matter Physics
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journal article
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Aydinyan , S V , Kirakosyan , H V , Zakaryan , M K , Abovyan , L S , Kharatyan , S L , Peikrishvili , A , Mamniashvili , G , Godibadze , B , Chagelishvili , E S , Lesuer , D R & 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 , vol. 20 , no. 4 , pp. 301-309 . https://doi.org/10.18321/ectj763