TY - GEN
T1 - Scaling and hierarhical structure of cohesive agglomerates of nanoparticles
AU - Keer, Leon M.
AU - Borodich, Feodor M.
AU - Shah, Binoy M.
N1 - Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2009
Y1 - 2009
N2 - Aggregation of dry cohesive powders and dissipation of energy during loading of the aggregates are under consideration. Under the influence of interparticle adhesion, fine particles of the powders cluster together to form simple agglomerates. The simple agglomerates adhere together to form larger, complex agglomerates, which in turn, may adhere together and form a hierarchical structure. It is shown that contrary to diffusion-limited colloid aggregation, the simple agglomerates consisting of alumna or titanium dioxide particles are not mass fractals. The core structure of the simple agglomerates is described as a non-ordered homogeneous structure with a constant volume fraction, while the outer part (shell) can be considered as a rough surface that may have quite extended protuberances. It is shown that the total energy dissipated during relative motion between simple agglomerates depends on the amount of the primary cycles - "jump into contact - pull off" between cohesive particles. Finally, the specific properties of cohesive powder dampers are discussed.
AB - Aggregation of dry cohesive powders and dissipation of energy during loading of the aggregates are under consideration. Under the influence of interparticle adhesion, fine particles of the powders cluster together to form simple agglomerates. The simple agglomerates adhere together to form larger, complex agglomerates, which in turn, may adhere together and form a hierarchical structure. It is shown that contrary to diffusion-limited colloid aggregation, the simple agglomerates consisting of alumna or titanium dioxide particles are not mass fractals. The core structure of the simple agglomerates is described as a non-ordered homogeneous structure with a constant volume fraction, while the outer part (shell) can be considered as a rough surface that may have quite extended protuberances. It is shown that the total energy dissipated during relative motion between simple agglomerates depends on the amount of the primary cycles - "jump into contact - pull off" between cohesive particles. Finally, the specific properties of cohesive powder dampers are discussed.
KW - Agglomeration
KW - Cohesive nanoparticles
KW - Energy dissipation
KW - Hierarchal structure
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U2 - 10.1007/978-1-4020-9033-2_27
DO - 10.1007/978-1-4020-9033-2_27
M3 - Conference contribution
AN - SCOPUS:84862063001
SN - 9781402090325
T3 - Solid Mechanics and its Applications
SP - 287
EP - 297
BT - IUTAM Symposium on Scaling in Solid Mechanics - Proceedings of the IUTAM Symposium
PB - Springer Verlag
T2 - IUTAM Symposium on Scaling in Solid Mechanics
Y2 - 25 June 2007 through 29 June 2007
ER -