quenching


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Related to quenching: tempering, quenching oil

quenching

[′kwench·iŋ]
(atomic physics)
Phenomenon in which a very strong electric field, such as a crystal field, causes the orbit of an electron in an atom to precess rapidly so that the average magnetic moment associated with its orbital angular momentum is reduced to zero.
(electronics)
The process of terminating a discharge in a gas-filled radiation-counter tube by inhibiting reignition.
Reduction of the intensity of resonance radiation resulting from deexcitation of atoms, which would otherwise have emitted this radiation, in collisions with electrons or other atoms in a gas.
(engineering)
Shock cooling by immersing liquid or molten material into a cooling medium (liquid or gas); used in metallurgy, plastics forming, and petroleum refining.
(immunology)
An adaptation of immunofluorescence that uses two fluorochromes, one of which absorbs light emitted by the other; one fluorochrome labels that antigen, another the antibody, and the antigen-antibody complexes retain both; the initially emitted light is absorbed and so quenched by the second compound.
(mechanical engineering)
Rapid removal of excess heat from the combustion chamber of an automotive engine.
(solid-state physics)
Reduction in the intensity of sensitized luminescence radiation when energy migrating through a crystal by resonant transfer is dissipated in crystal defects or impurities rather than being reemitted as radiation.
References in periodicals archive ?
A short time-scale suggests that we need to look for external physical processes that are fast in quenching.
The fluorescence quenching of Cry1Ab toxin was measured for a toxin concentration of 40 ug/mL at pH 7, and the concentrations of metal ions changed from 0.
The heat transfer inside the solid during quenching process could be described by heat equation and corresponding boundary conditions[12], assuming no heat generation during quenching process:
In summary, the dry quenching of coke introduced in 1976 is now used at a number of plants.
There are two cooling conditions including air cooling from exit position to quenching region and water cooling during online quenching of profiles.
After intercritic quenching, samples were tested for universal hardness on a SHIMATZU dynamic ultra-micro hardness tester DUH-211S.
The Nitrofreeze[R] Uphill Quenching Process eliminates the resident residual stresses in the raw cast or forged aluminum block as well those that are created during CNC machining operations," he added.
Coupled with the basketless heat treat system, the PAQ system further reduces the size of the quenching system.
In the coke quenching process, following eight hours in the coke ovens, the material is pushed from the oven and immediately quenched by a cascade of 10 tonnes of water.