2. The different stages of solid phase sintering

2.1 Thermodynamic aspect. Causes

Consider a mole of copper (63.5 g), made up of 1 µm cubic grains, and the same mole of copper made up of a single grain (figure 7 ). These two systems differ in the areas of their solid-gas interfaces. The single grain has a lower specific surface area (surface area per unit mass) than the dispersed system. This decrease in surface area d A _sg corresponds to a decrease in energy of the form γ _sg d A _sg . The proportionality coefficient γ _sg ...