Deformation of interparticle necks by diffusion-controlled creep

Journal Article · Fri Mar 01 04:00:00 EST 1996 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1996.tb07927.x· OSTI ID:230739

Bouvard, D ^[1]; McMeeking, R M ^[2]

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1. UJF/CNRS/INPG, Grenoble (France). Lab. Sols, Solides, Structures
2. Univ. of California, Santa Barbara, CA (United States). Mechanical and Environmental Engineering Dept.

The deformation of a neck between two spherical particles of the same size by coupled grain-boundary and surface diffusion has been simulated numerically through the finite-difference method. In the case of pure sintering where there is no applied stress, the results agree quite well with simple analytical models. When a force is applied, it is found that they do not deform as truncated spheres, even when surface diffusion is much faster than grain-boundary diffusion. Expressions are given representing the rate of approach of the particles and the rate of growth of the neck as a function of the current neck radius and the applied stress.

• Sponsoring Organization: USDOE
• OSTI ID: 230739
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 3 Vol. 79; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
FINITE DIFFERENCE METHOD
GRAIN BOUNDARIES
MATHEMATICAL MODELS
METALS
NUMERICAL ANALYSIS
SIMULATION
SINTERING
SPHERES
STRESSES
SURFACE ENERGY