Crystal Growth

A crystal is a solid material whose constituent atoms, molecules, or ions are arranged in an orderly repeating pattern extending in all three spatial dimensions. Crystal growth is a major stage of a crystallization process, and consists in the addition of new atoms, ions, or polymer strings into the characteristic arrangement of a crystalline Bravais lattice. The growth typically follows an initial stage of either homogeneous or heterogeneous (surface catalyzed) nucleation, unless a "seed" crystal, purposely added to start the growth, was already present.

The action of crystal growth yields a crystalline solid whose atoms or molecules are typically close packed, with fixed positions in space relative to each other. The crystalline state of matter is characterized by a distinct structural rigidity and virtual resistance to deformation (i.e. changes of shape and/or volume). Most crystalline solids have high values both of Young's modulus and of the shear modulus of elasticity. This contrasts with most liquids or fluids, which have a low shear modulus, and typically exhibit the capacity for macroscopic viscous flow.

Read more about Crystal GrowthIntroduction, Discontinuity, Nucleation, Mechanisms of Growth, Morphology

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Space Manufacturing - History
... processing facility that included a multi-purpose electric furnace, a crystal growth chamber, and an electron beam gun ... the behavior of ignited materials in zero-gravity crystal growth processing of immiscible alloys brazing of stainless steel tubes, electron beam welding, and the formation of spheres from molten metal ... Among the experiments were crystal growth and the behavior of molten-metal in weightlessness ...
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Lodewijk Van Den Berg - Spaceflight - STS-51B
... conducted investigations into crystal growth, drop dynamics leading to containerless material processing, atmospheric trace gas spectroscopy, solar and planetary ... As a co-investigator of the Vapor Crystal Growth System (VCGS) experiment, Van den Berg was responsible for the crystal growth aspects of the VCGS experiment ...
Laser-heated Pedestal Growth
... Laser-heated pedestal growth (LHPG) is a crystal growth technique ... Among all the modern techniques for growing crystals from the melt (liquid/solid phase transition), it has become one of the most powerful for materials research ... addition, LHPG is a crucible-free technique, which allows single crystals to be grown with high purity and low stress ...

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