title: Evolution of fractal particles in systems with conserved order parameter
abstract: Computer simulations of the evolution of fractal aggregates in systems with conserved order parameter are described in this work. The aggregates are generated by diffusion-limited aggregation. This model describes such important processes as annealing of dendrite inclusions in solids, healing of cracks in ceramics, temperature-induced transformations in composites, relaxation of rough surfaces, aging of colloid particles, etc. It is shown that the evolution in fractal media differs significantly from that occurring in initially homogeneous systems and leads to different values of the scaling exponent. A relationship between the fractal dimension, mechanism of relaxation, and scaling exponent was also derived.
authors.affiliation: Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
authors.initials: SV
authors.lastname: Kalinin
authors.initials: DL
authors.lastname: Gorbachev
authors.initials: AY
authors.lastname: Borisevich
authors.initials: KV
authors.lastname: Tomashevitch
authors.initials: AA
authors.lastname: Vertegel
authors.initials: AJ
authors.lastname: Markworth
authors.initials: YD
authors.lastname: Tretyakov