thermal properties Flashcards
Heat Capacity
General: The ability of a material to absorb heat.
Heat capacity:
* Increases with
temperature
* Reaches a limiting value of 3R for
many simple crystalline solids such as
metals
increasing cp
metal crmc polymer
increase of thermal expansion coefficient
cermc metal polymr
Polymers have larger α!
values because
Polymers have larger α!
values because of weak
secondary bonds
Thermal Stresses
Occur due to
Thermal Stresses
Occur due to:
* Restrained thermal expansion/contraction
Thermal Shock Resistance
* Occurs due to:
Thermal Shock Resistance
* Occurs due to: nonuniform heating/cooling
A material responds to heat by:
A material responds to heat by:
* Increased vibrational energy.
* Redistribution of this energy to achieve thermal equilibrium
Thermal Conductivity: Comparison
polymer crmc metal
materoal spcfc heat depends on
density