Material Transport Rate and Stress Distribution During Grain Boundary Diffusion Driven by Surface Tension
During sintering of irregular particles or irregular arrangements of spherical particles asymmetric necks may form. The problem of stress distribution and grain boundary diffusion is solved analytically for symmetric and asymmetric necks. The stress distribution, the atomic flux and the rate of material removal or material deposition in the grain boundary are shown graphically for various ratios of curvatures at the left and the right hand side of the neck and for a constant curvature ratio for varying grain boundary length. Some conclusions are drawn for material transport and angle change between the particles during sintering.
KeywordsStress Distribution Material Removal Material Removal Rate Surface Curvature Boundary Diffusion
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