MSE defs small

MSE defs small - acceptor level Alloy anion atomic packing...

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acceptor level in the band theory, local energy levels close to the valence band Alloy A mixture of two or more metals or a metal (metals) and a nonmetal (nonmetals). anion ion with a negative charge atomic packing factor the volume of atoms in a selected unit cell divided by the volume of the unit cell austenite An interstitial solid solution of carbon in FCC iron bainite a mixture of ferrite and very small particles of Fe3C body centered cubic unit cell with an atomic packing arrangement where one atom is in contact with 8 identical atoms brittle fracture A mode of fracture characterized by rapid crack propagation cation ion with a positive charge cementite The intermetallic compound Fe3C ceramic materials materials consisting of compounds of metals and nonmetals. Usually hard and brittle Cold Working permanent deformation of metals and alloys below the temperature at which a strain-free microstructure is produced continuously composite materials materials that are mixtures of two or more materials conduction band the unfilled energy levels into which electrons can be excited to become conductive electrons covalent bond a primary bond resulting from the sharing for electrons crystal a solid composed of atoms, ions, or molecules arranged in a pattern that is repeated in three dimensions Dislocation A crystalline imperfection in which a lattice distortion is centered around a line donor level In the band theory, local energy levels near the conduction band that lie within the band gap. DBTT the temperature at which reduced ductility and fracture resistance are observed. ductile fracture A mode of fracture characterized by slow crack propagation elastic deformation A material deformed by a force returns to its original dimensions after the force is removed e. current The time rate of charge through material e. current density the electric current per unit area e. conductivity a measure of the ease with which electric current passes through a unit volume of materia electrical conductors
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This note was uploaded on 04/02/2008 for the course MSE 150 taught by Professor Wittig during the Spring '07 term at Vanderbilt.

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MSE defs small - acceptor level Alloy anion atomic packing...

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