Chapter 2 Metallurgy Flashcards
Atomic Bond
The force that holds atoms together
Density
The mass per unit volume of a material, measured in grams per cubic centimeter or pounds per cubic inch.
Physical properties
Of metals are the characteristic responses to forms of energy such as heat, electricity, and magnetism.
Melting point
Temp. At which a material transitions from a solid to a liquid state
Absolute zero
The theoretical condition at which no heat is present.
Heat sink
A component with high thermal conductivity that is used to rapidly conduct heat away from a location.
Heat capacity
The amount of thermal energy required to raise the temp. Of a body by one degree.
Thermal expansion
The change in a material size due to changes in temperature.
Thermowell
A protective sheath used to protect a thermocouple from a harsh environment and mechanical abuse.
Thermal conductivity
The rate at which thermal energy flows through a material.
Temp. Indicating crayon
Marker made from a material that melts at a certain temp.
Pyrometer
An instrument used for measuring temps. (Beyond the range of mercury thermometers) by the increase of electrical resistance in a metal, generation of electrical current of a thermocouple, or increase in intensity of light radiated by an incandescent body.
Thermocouple
A device consisting of 2 electrically connected dissimilar metal wires that produces a small voltage in proportion to temp.
Super conductivity
A complete reduction of electrical resistance in a material at temps near absolute zero.
Electrical resistivity
The measure of how strongly a material opposes the flow of electrical current
