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Название: Compaction and flow rule of oxide nanopowders
Авторы: Boltachev, G. S.
Lukyashin, K. E.
Maximenko, A. L.
Maksimov, R. N.
Shitov, V. A.
Shtern, M. B.
Дата публикации: 2017
Издатель: Elsevier B.V.
Библиографическое описание: Compaction and flow rule of oxide nanopowders / G. S. Boltachev, K. E. Lukyashin, A. L. Maximenko, et al. — DOI 10.1016/j.optmat.2016.09.068 // Optical Materials. — 2017. — Vol. 71. — P. 145-150.
Аннотация: Transparent Al2O3 ceramics have attracted considerable interest for use in a wide range of optical, electronic and structural applications. The fabrication of these ceramics using powder metallurgy processes requires the development of theoretical approaches to the compaction of nanopowders. In this work, we investigate the compaction processes of two model granular systems imitating Al2O3 nanosized powders. System I is a loosely aggregated powder, and system II is a powder strongly inclined to agglomeration (for instance, calcined powder). The processes of isostatical (uniform), biaxial, and uniaxial compaction as well as uniaxial compaction with simultaneous shear deformation are studied. The energy parameters of compaction such as the energy change of elastic interparticle interactions and dispersion interactions, dissipative energy losses related to the processes of interparticle friction, and the total work of compaction are calculated for all the processes. The nonapplicability of the associated flow rule to the description of deformation processes of oxide nanopowders is shown and an alternative plastic flow rule is suggested. A complete system of determining the relationship of the flow including analytical approximations of yield surfaces is obtained. © 2016 Elsevier B.V.
Ключевые слова: COLD COMPACTION
FLOW RULE
OXIDE NANOPOWDER
YIELD SURFACE
ALUMINA
ALUMINUM OXIDE
ASSOCIATION REACTIONS
CERAMIC MATERIALS
ENERGY DISSIPATION
NANOSTRUCTURED MATERIALS
POWDER METALLURGY
STRUCTURAL CERAMICS
ANALYTICAL APPROXIMATION
COLD COMPACTION
FLOW RULES
INTER-PARTICLE INTERACTION
NANO POWDERS
POWDER METALLURGY PROCESS
STRUCTURAL APPLICATIONS
YIELD SURFACE
COMPACTION
URI: http://elar.urfu.ru/handle/10995/102180
Условия доступа: info:eu-repo/semantics/openAccess
Идентификатор SCOPUS: 85000786930
Идентификатор PURE: 2042552
c66d3641-d047-4a17-8795-7b2aae558f24
ISSN: 9253467
DOI: 10.1016/j.optmat.2016.09.068
Располагается в коллекциях:Научные публикации ученых УрФУ, проиндексированные в SCOPUS и WoS CC

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