ALUMINUM
|
PROPERTY |
@ 300K |
UNITS |
REFERENCES |
|
Density |
2.71 |
G/cm3 |
Al1 Al2 Al3 |
|
Specific Heat |
0.211 |
Cal/g-K |
Al4 Al5 Al6 |
|
Thermal Conductivity |
0.566 |
Cal/cm-s-K |
Al7 Al8 Al9 |
|
Thermal Exp Coef 2 |
23.2x10-6 |
1/K |
Al10 Al11 Al12 |
|
Melting Point |
933.52 |
K |
Al13 |
|
Resistivity 1 |
2.73x10-6 |
Ohm-cm |
Al14 Al15 Al16 |
|
TCR (218K to 398K) |
4190 |
Ppm/K |
Al14 Al15 Al16 |
|
Young’s Modulus 2 |
1.02x107 |
psi |
Al17 Al18 Al19 |
|
Poisson’s Ratio |
0.346 |
----- |
Al17 Al18 Al19 |
|
Yield Strength |
1500 |
psi |
Al20 Al21 Al23 |
|
Ult Tensile strength |
6500 |
psi |
Al20 Al21 Al22 |
|
Elongation at Break |
50 |
% |
Al20 Al22 Al23 |
|
Hardness |
17 |
Brinell |
Al24 Al25 Al26 |
1: Aluminum deposited on substrates held at 150C-200C in vacuums in the range of 10-5 to 10-6 torr produces thin films with resistivities in the range of 3 to 4x10-6 ohm-cm. A sheet resistivity of 0.1 ohms/sq can be achieved with 3000 to 4000 angstrom films. [A127]
2: Recent work on aluminum thin films on quartz suggests the modulus of elasticity for 99.999% pure material deposited in vacuum of 8x10-4 Pa is about one-half the bulk value and the expansion coefficient is about twice the bulk value. Heating the film subsequent to deposition will cause the properties of the film to approach the bulk values. [Al28]
Mechanical properties listed are for fully annealed, bulk material. 75% cold work will increase the strength of 0.08 inch sheet to 25,000 psi, increase hardness to 47 and reduce the elongation (3 inch gauge length) to 5.4%. [Al29] Thin polycrystalline aluminum films have a reported maximum tensile strength of 57,000 psi with a total strain at fracture of 0.5 to 0.8%. [Al30] Heating cold worked material to temperatures in the range of 400 to 600K will cause recovery and recrystallization erasing the effects of cold work.