Publication

Kinetics of densification by solution-reprecipitation

Andreas Mortensen
1997
Journal Articles

Abstract

The densification rate and microstructural evolution of powder compacts densifying by solution-reprecipitation in the presence of a liquid phase are predicted with the assumption that solid particles are equisized spheres randomly packed and pulled together by a liquid that wets perfectly both the solid and its grain boundaries. The influences of applied pressure, initial packing density and of the ''sphering force'' due to changes in solid particle shape are accounted for. The resulting sintering rate retains approximately the one-third power law dependence of linear shrinkage on time predicted by Kingery, and shows good agreement with published experimental data. The analysis is extended to include the role of particle coarsening, so as to assess its importance and influence in densification kinetics. Copyright (C) 1997 Acta Metallurgica Inc.

Official source

https://infoscience.epfl.ch/entities/publication/9d2ef740-c299-4862-be8b-fed9723036c8

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Andreas Mortensen
1997
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/9d2ef740-c299-4862-be8b-fed9723036c8

About this result

Related concepts (32)

Grain growth

In materials science, grain growth is the increase in size of grains (crystallites) in a material at high temperature. This occurs when recovery and recrystallisation are complete and further reduction in the internal energy can only be achieved by reducing the total area of grain boundary. The term is commonly used in metallurgy but is also used in reference to ceramics and minerals. The behaviors of grain growth is analogous to the coarsening behaviors of grains, which implied that both of grain growth and coarsening may be dominated by the same physical mechanism.

Sintering

Sintering or frittage is the process of compacting and forming a solid mass of material by pressure or heat without melting it to the point of liquefaction. Sintering happens as part of a manufacturing process used with metals, ceramics, plastics, and other materials. The nanoparticles in the sintered material diffuse across the boundaries of the particles, fusing the particles together and creating a solid piece.

Liquid

A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a nearly constant volume independent of pressure. It is one of the four fundamental states of matter (the others being solid, gas, and plasma), and is the only state with a definite volume but no fixed shape. The density of a liquid is usually close to that of a solid, and much higher than that of a gas. Therefore, liquid and solid are both termed condensed matter.

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Kinetics of densification by solution-reprecipitation

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