Solidus (diagram of phases)

See also: Solidus

For a affected Material by a process of Solidification, Crystallization or fusion, the solidus of a Diagramme of phase separates the field where of that exists only solid where coexist solid and Liquide. At increasing temperature, to cross the solidus amounts beginning a partial Fusion; at decreasing temperature, that returns to a total solidification.

The concept of solidus is used in Métallurgie and Pétrographie to specify on the diagrams of phase the end of Cristallisation or the beginning of the appearance of liquid inclusions in the Alliage, the Roche, etc For example, in a binary system representing a combination of two components (pure Substance S or made up) completely miscible S (for example, the Cuivre and the Nickel), the solidus is a curve which gives the temperature for which the mixture is completely solidified according to the mix design. In Geology, the solidus depends obviously on the Pression and the Température in-depth.

Related articles

• Liquidus
• Diagram of phase