2018 - Sustainable Industrial Processing Summit & Exhibition
4-7 November 2018, Rio Othon Palace, Rio De Janeiro, Brazil
Seven Nobel Laureates have already confirmed their attendance: Prof. Dan Shechtman, Prof. Sir Fraser Stoddart, Prof. Andre Geim, Prof. Thomas Steitz, Prof. Ada Yonath, Prof. Kurt Wüthrich and Prof. Ferid Murad. More than 400 Abstracts Submitted from about 60 Countries.
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    Fabrication of Nanocomposites by Mechanical Alloying and Explosive Consolidation
    Nikoloz Chikhradze1; Guram Abashidze1; Fernand Marquis2; Mikheil Chikhradze3;
    1G. TSULUKIDZE MINING INSTITUTE, Tbilisi, Georgia; 2SAN DIEGO STATE UNIVERSITY, San Diego, United States; 3GEORGIAN TECHNICAL UNIVERSITY, Tbilisi, Georgia;
    PAPER: 212/AdvancedMaterials/Invited (Oral)
    SCHEDULED: 15:15/Mon./Guaratiba (60/2nd)



    ABSTRACT:
    Bulk nanostructure materials are characterized by high specific strength, hardness, corrosion, and wear resistant properties, and in particular, conditions by super-plasticity [1, 2, 3]. They exhibit specific electrical, thermal, magnetic, optical, chemical and other properties. Accordingly, the demand on nanoparticles and bulk nanocomposites in increased for practical application. Therefore, the development of new technologies for fabrication of bulk nanocomposites is big challenge. This paper consists of an experimental investigation and manufacture of multifunctional bulk nanostructured composite materials in Ti-Al-B-C, Si-B-C, SiC-B-C B<sub>4</sub>C-SiC, B<sub>4</sub>C-Si-C systems. The coarse crystalline Ti, Al, amorphous Boron and Carbon (Graphite) elementary pure (at least 98%) powders were used as precursors. The blend with different percentage contents of the powders were prepared. The high energetic "Fritsch" Planetary ball mill was used for blend processing, mechanical alloying, amorphization, and nanopowder production. The time of processing varied in range of: 1-36h. The optimal technological regimes for nanopowder preparation are determined experimentally. Ball milled blend compacted by explosive consolidation technology and bulk composite materials are fabricated. For shock wave generation, the industrial explosives and new explosives obtained from decommissioned weapons were used in the experiments. The technological parameters of the explosive consolidation and the structure-properties relationship are presented and discussed in the paper.

    References:
    [1] The Second World Space Congress, 10-19 October, 2002, Houston, TX, USA., I-4-03IAF, 34th COSPAR Scientific Assembly
    [2] R. Mania, M. Dabrowski et all, International Journal of Self-Propagating High-Temperature Synthesis. 2003 v. 12, #3, 159-164
    [3] R.M. Da Rocha, Chapter in Ceramic Engineering Science Proceeding, Jan., 2010