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- Liquidus abstract "The liquidus temperature, TL or Tliq, is mostly used for glasses, alloys and rocks. It specifies the temperature above which a material is completely liquid, and the maximum temperature at which crystals can co-exist with the melt in thermodynamic equilibrium. Above the liquidus temperature the material is homogeneous and liquid at equilibrium. Below the liquidus temperature more and more crystals may form in the melt if one waits a sufficiently long time, depending on the material. However, even below the liquidus temperature homogeneous glasses can be obtained through sufficiently fast cooling, i.e., through kinetic inhibition of the crystallization process.The crystal phase that crystallizes first on cooling a substance to its liquidus temperature is termed primary crystalline phase or primary phase. The composition range within which the primary phase remains constant is known as primary crystalline phase field.The liquidus temperature is important in the glass industry because crystallization can cause severe problems during the glass melting and forming processes, and it also may lead to product failure.The liquidus temperature can be contrasted to the solidus temperature. The solidus temperature quantifies the point at which a material completely solidifies (crystallizes). The liquidus and solidus temperatures do not necessarily align or overlap; if a gap exists between the liquidus and solidus temperatures, then within that gap, the material consists of solid and liquid phases simultaneously (like a slurry).For pure substances, e.g. pure metal, pure water, etc. the liquidus and solidus are at the same temperature, and the term "melting point" may be used. For impure substances, e.g. alloys, tap water, coca cola, ice cream, etc. the melting point broadens into a melting interval instead. If the temperature is within the melting interval, one may see "slurries" at equilibrium, i.e. the slurry will neither fully solidify nor melt. This is why new snow of high purity either melts or stays solid, while dirty snow on the ground tend to become slushy at certain temperatures. Weld melt pools containing high levels of sulfur, either from melted impurities from the base metal or from the welding electrode, typically have very broad melting intervals, which leads to increased risk of hot cracking.".
- Liquidus thumbnail SiO2_Li2O.GIF?width=300.
- Liquidus wikiPageExternalLink liquidus.
- Liquidus wikiPageExternalLink www.sciglass.info.
- Liquidus wikiPageID "8796024".
- Liquidus wikiPageRevisionID "591392480".
- Liquidus hasPhotoCollection Liquidus.
- Liquidus subject Category:Glass_chemistry.
- Liquidus subject Category:Glass_engineering_and_science.
- Liquidus subject Category:Glass_physics.
- Liquidus subject Category:Materials_science.
- Liquidus subject Category:Metallurgy.
- Liquidus subject Category:Phase_transitions.
- Liquidus subject Category:Threshold_temperatures.
- Liquidus type NaturalProcess113518963.
- Liquidus type PhaseChange113536016.
- Liquidus type PhaseTransitions.
- Liquidus type PhysicalEntity100001930.
- Liquidus type Process100029677.
- Liquidus comment "The liquidus temperature, TL or Tliq, is mostly used for glasses, alloys and rocks. It specifies the temperature above which a material is completely liquid, and the maximum temperature at which crystals can co-exist with the melt in thermodynamic equilibrium. Above the liquidus temperature the material is homogeneous and liquid at equilibrium. Below the liquidus temperature more and more crystals may form in the melt if one waits a sufficiently long time, depending on the material.".
- Liquidus label "Likwidus".
- Liquidus label "Liquidus".
- Liquidus label "Liquidus".
- Liquidus label "Liquidus".
- Liquidus label "Liquidus".
- Liquidus label "Liquidus".
- Liquidus label "Liquidustemperatur".
- Liquidus label "Ликвидус".
- Liquidus sameAs Liquidustemperatur.
- Liquidus sameAs Liquidus.
- Liquidus sameAs Liquidus.
- Liquidus sameAs Liquidus.
- Liquidus sameAs Likwidus.
- Liquidus sameAs Liquidus.
- Liquidus sameAs m.027k1by.
- Liquidus sameAs Q899386.
- Liquidus sameAs Q899386.
- Liquidus sameAs Liquidus.
- Liquidus wasDerivedFrom Liquidus?oldid=591392480.
- Liquidus depiction SiO2_Li2O.GIF.
- Liquidus isPrimaryTopicOf Liquidus.
