Consolidation of nanoparticles—development of a micromechanistic model

Preparation of Nanocrystalline Molybdenum Disilicide (MoSi2) by a Chlorine-Transfer Reaction

“…No discernible enhancement in densification rate over coarse-grained MoSi 2 powders, which have been shown to condense to 93% of full density within 4 h at 1200 °C and 207 MPa, was observed. This is in contrast to previous reports for densification rates of nanocrystalline materials in comparison to conventional, coarse- grained counterparts, , but matches model predictions for the densification of nanocrystalline MoSi 2 . Enhanced rates have been attributed to greater diffusivities for the high-surface-area nanocrystalline materials.…”

Effect of Varying Displacement Rates on the Densification of Nanostructured Zirconia by Current Activation

“…The mechanisms are related in that they all require diffusion either along the grain boundary or through the lattice. The equations given by Suryanarayanan Iyer 15 following the equations derived by Helle et al 16 in their classic HIP model for possible densification mechanisms in Stage 1 (where there is open porosity in the compact) are listed below:…”

Pressure effects and grain growth kinetics in the consolidation of nanostructured fully stabilized zirconia by pulsed electric current sintering

“…In the sintering of nanopowders the application of pressure can influence various mass transport mechanisms including diffusion creep, plastic yield, and grain boundary sliding [17]. The commonly experienced difficulty in the sintering of nanopowders is attributed to the presence of agglomerates.…”