Browsing by Author "Popov, Vladimir V."

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    Novel hybrid method to additively manufacture denser graphite structures using Binder Jetting
    (Nature Publishing Group, 2021-01-28) Popov, Vladimir V.; Fleisher, Alexander; Muller-Kamskii, Gary; Shishkin, Andrei; Katz-Demyanetz, Alexander; Travitzky, Nahum; Goel, Saurav
    This study introduces two hybrid processes integrating an additive manufacturing technique with post-processing treatments namely (i) Binder Jetting Printing (BJP) + Cold Isostatic Pressing (CIP) + cycle and (ii) BJP + cycle where cycle refers to a sequence of Impregnation—Drying—Pyrolysis. These two new processes yielded additively manufactured parts with higher density and reduced defects/porosities. As a testbed, we used these new processes to fabricate graphite structures. The samples produced by both methods were compared with each other and benchmarked to the samples produced by (a) BJP alone and (b) Traditional uniaxial pressing like compaction moulding. Various characterisation methods were used to investigate the microstructure and mechanical properties which showed that the porosity of hybrid manufactured samples reduces from 55% to a record 7%. This technological pathway is expected to create a new avalanche of industrial applications that are hitherto unexplored in the arena of hybrid additive manufacturing with BJP method.
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    Powder bed fusion additive manufacturing using critical raw materials: a review
    (MDPI, 2021-02-14) Popov, Vladimir V.; Grilli, Maria Luisa; Koptyug, Andrey; Jaworska, Lucyna; Katz-Demyanetz, Alexander; Klobčar, Damjan; Balos, Sebastian; Postolnyi, Bogdan O.; Goel, Saurav
    The term “critical raw materials” (CRMs) refers to various metals and nonmetals that are crucial to Europe’s economic progress. Modern technologies enabling effective use and recyclability of CRMs are in critical demand for the EU industries. The use of CRMs, especially in the fields of biomedicine, aerospace, electric vehicles, and energy applications, is almost irreplaceable. Additive manufacturing (also referred to as 3D printing) is one of the key enabling technologies in the field of manufacturing which underpins the Fourth Industrial Revolution. 3D printing not only suppresses waste but also provides an efficient buy-to-fly ratio and possesses the potential to entirely change supply and distribution chains, significantly reducing costs and revolutionizing all logistics. This review provides comprehensive new insights into CRM-containing materials processed by modern additive manufacturing techniques and outlines the potential for increasing the efficiency of CRMs utilization and reducing the dependence on CRMs through wider industrial incorporation of AM and specifics of powder bed AM methods making them prime candidates for such developments.