Materials Science Final Vocab (Vanderbilt)

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Materials which are characterized by high thermal and electrical conductivity
 
Materials consisting of compounds of metals and nonmetals which are usually hard and brittle
 
Materials consisting of long molecular chains or networks of low-weight elements such as carbon, hydrogen, oxygen, and nitrogen.
 
An ion with a negative charge.
 
An ion with a positive charge
 
A nondirectional primary bond resulting from electrostatic attraction
 
A directional primary bond resulting from the sharing of electrons
 
A primary bond resulting from the sharing of delocalized electrons.
 
Electrons in the outermost shells which are most often involved in bonding
 
A regular three-dimensional pattern of atoms or ions in space
 
A convenient repeat unit of a space lattice
 
A unit cell with an atomic packing arrangement in which one atom is in contact with eight identical atoms located at the corners of an imaginary cube
 
A unit cell with atomic packing where each atom has 12 nearest neighbors. The stacking sequence of close-packed layers is ABCABC
 
A unit cell with atomic packing where each atom has 12 nearest neighbors. The stacking sequence of close-packed layers is ABAB
 
The volume of atoms in a selected unit cell divided by the volume of the unit cell.
 
A single crystal in a polycrystalline aggregate
 
Grains which are approximately equal in all directions
 
A crystalline structure which contains many grains
 
An alloy of two or more metals or a metal(s) and a nonmetal(s) which is a single-phase atomic mixture
 
A mixture of two or more metals or a metal (ketals) and a nonmetal (nonmetals)
 
A crystalline imperfection in which a lattice distortion is centered around a line
 
A surface imperfection which separate crystals of different orientations in a polycrystalline aggregate
 
Permanent deformation of metals and alloys below the temperature at which a strain-free microstructure is produced continuously
 
A measure of the resistance of a material to permanent deformation.
 
The process of atoms moving over each other during the permanent deformation of a metal.
 
Line markings on the surface of a metal due to slip caused by permanent deformation.
 
A combination of a slip plane and a slip direction.
 
The first sage in the removal of the effects of cold working when a cold-worked meal is slowly heated.
 
The process whereby a cold-worked metal is heated to a sufficiently high temperature for a long enough time to form a new strain-free grain structure.
 
A planar defect where the structure is a mirror image across the twin plane.
 
The time rate passage of charge through material.
 
The electric current per unit area
 
The measure of the difficulty of electric current to pass through a volume of material
 
The measure of the difficulty of electric current to pass through a unit volume of material
 
A measure of the ease of electron current to pass through a unit volume of material
 
A material with a low electrical conductivity
 
A material with high electrical conductivity
 
A material whose electrical conductivity is approximately midway between the values for conductors and insulators
 
The energy band containing the valence electrons
 
The unfilled energy levels into which elecrons can be excited to become conduction electrons
 
A semiconducting material which is essentially pure and for which the energy gap is small enough to be surmounted by thermal excitation
 
A negative charge carrier with a charge of 1.60 x 10-19 C
 
A positive charge carrier with a charge of 1.60 x 10-19 C
 
A semiconductor that has been doped with an impurity element to increase its conductivity
 
In the band theory, local energy levels near the conduction band that lie within the band gap
 
In the band theory, local energy levels near the valence band that lie within the band gap
 
Average force divided by the original cross-sectional area
 
The change in length of sample divided by the original length of the sample
 
Stress divided by strain in the elastic region of an engineering stress-strain diagram
 
The stress at which a specific amount of strain (0.2%) occurs in the engineering tensile test
 
The maximum stress in the engineering stress-strain diagram
 
A mode of fracture characterized by slow crack propagation.
 
A mode of fracture characterized by rapid crack propagation
 
A measure of the amount of energy a material can absorb before fracture
 
The critical value of the stress-intensity factor
 
A localized decrease in the cross-section of a tensile specimen
 
A material deformed by a force returns to its original dimensions after the force is removed
 
A material deformed by a force has changed its shape after the force is removed
 
The tensile strength of a material divided by its density
 
The elastic modulus of a material divided by its density
 
The condition of stress on a composite material which causes uniform stress on all the composite layers
 
The condition of stress on a composite material which causes uniform strain on all the composite layers
 
A system where no macroscopic changes take place with time
 
A physically homogeneous and distinct portion of a material system
 
The temperature at which liquid starts to solidify under equilibrium conditions
 
The temperature during solidification of an alloy at which the last of the liquid phase solidifies
 
A phase transformation in which all the liquid phase transforms on cooling into tow solid phases isothermally
 
The temperature at which a eutectic reaction takes place
 
The composition of the liquid phase that reacts to form two new solid phases at the eutectic temperature
 
The point determined by the eutectic composition and temperature
 
Equilibrium phase transformations involving zero degrees of freedom
 
One which is to the left of the eutectic point
 
One which is to the right of the eutectic point
 
An interstitial solid solution of carbon in FCC iron
 
An interstitial solid solution of carbon in BCC iron
 
The intermetallic compound Fe3C, a hard and brittle substance
 
A mixture of ferrite and cementite phases in parallel plates produced by the euctectoid decomposition of austenite
 
A steel with 0.8% C
 
The ease of forming martensite in a steel upon quenching from the austenitic condition
 
A supersaturated interstitial solid solution of carbon in body-centered tetragonal iron
 
A mixture of ferrite and small particles of Fe3C produced by the decomposition of austenite
 
A test in which a 1 in diameter bar by 4 in long is austenitized and then water quenched at one end.
 
Substances of which something is composed or made
 
A discipline, which is primarily concerned with the search for basic knowledge about the internal structure, properties, and processing of materials
 
A discipline which is primarily concerned with use of fundamental and applied knowledge of materials so that they can be converted into products needed or desired by society
 
Metals and alloys which do not contain iron or if they do contain iron, it is only in a relatively small percentage
 
Metals and alloys which contain a large percentage of iron such as steels and cast irons
 
Materials which are a mixture of two or more materials
 
Materials used in electronics, especially microelectronics
 

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Created Apr 26, 2012ReportNominate
Tags:final, material, vanderbilt