crystal grain size

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• Particle size (grain size) — Particle size, also called grain size, refers to the diameter of individual grains of sediment, or the lithified particles in clastic rocks. The term may also be applied to other granular materials. This is different from the crystallite size,… …   Wikipedia

• Grain boundary strengthening — (or Hall Petch strengthening) is a method of strengthening materials by changing their average crystallite (grain) size. It is based on the observation that grain boundaries impede dislocation movement and that the number of dislocations within a …   Wikipedia

• Grain growth — refers to the increase in size of grains (crystallites) in a material at high temperature. This occurs when recovery and recrystallisation are complete and further reduction in the internal energy can only be achieved by reducing the total area… …   Wikipedia

• Grain (disambiguation) — Grain refers to course particles (e.g. grain of sand , grain of salt ): *Grain is the small, hard, fruits or seeds of arable crops. Commonly grasses (see caryopsis, Cereals). *Film grain, the gritty texture sometimes apparent on images produced… …   Wikipedia

• crystal — crystallike, adj. /kris tl/, n., adj., v., crystaled, crystaling or (esp. Brit.) crystalled, crystalling. n. 1. a clear, transparent mineral or glass resembling ice. 2. the transparent form of crystallized quartz. 3. Chem., Mineral. a solid body… …   Universalium

• Crystal — /kris tl/, n. 1. a city in SE Minnesota, near Minneapolis. 25,543. 2. a female given name. * * * I Any solid material whose atoms are arranged in a definite pattern and whose surface regularity reflects its internal symmetry. Each of a crystal s… …   Universalium

• Crystal structure — In mineralogy and crystallography, crystal structure is a unique arrangement of atoms or molecules in a crystalline liquid or solid. A crystal structure is composed of a pattern, a set of atoms arranged in a particular way, and a lattice… …   Wikipedia

• Grain boundary — A grain boundary is the interface between two grains in a polycrystalline material. Grain boundaries disrupt the motion of dislocations through a material, so reducing crystallite size is a common way to improve strength, as described by the Hall …   Wikipedia

• grain — /greɪn / (say grayn) noun 1. a small hard seed, especially a seed of one of the cereal plants: wheat, rye, oats, barley, maize, or millet. 2. the gathered seeds of cereal plants in the mass. 3. the plants themselves, whether standing or gathered …  

• grain — I. noun Etymology: Middle English, partly from Anglo French grain cereal grain, from Latin granum; partly from Anglo French graine seed, kermes, from Latin grana, plural of granum more at corn Date: 14th century 1. a. (1) obsolete a single small… …   New Collegiate Dictionary

• grain — n. & v. n. 1 a fruit or seed of a cereal. 2 a (collect.) wheat or any allied grass used as food, corn. b (collect.) their fruit. c any particular species of corn. 3 a a small hard particle of salt, sand, etc. b a discrete particle or crystal, usu …   Useful english dictionary