As mentioned before, the liquid pha

As mentioned before, the liquid phase is formed when the mixed powders are heated to a certain temperature. Immediately after liquid formation, there is a rapid initial densification due to the capillary force exerted by the wetting liquid on the solid particles. During this initial rearrangement stage,the powder system responds as a viscous solid to the capillary action. At a later stage of LPS, as the densification rate decreases, solubility and diffusivity effects lead to grain growth, shape accommodation, and microstructural coarsening. The densification finally stops when the rigidity of the solid skeleton formed prevents further rearrangement of particles.