CORRELATION BETWEEN COPPER ELECTRICAL PROPERTIES & P/M PART DENSITY.

The electrical conductivity (?) of wrought and cast copper as accepted is 100% of IACS (International Annealed Copper Society).

Due to residual porosity, the electrical conductivity of the Powder Metallurgy (PM) parts is less than that of wrought and cast copper: higher density and lower porosity results in higher conductivity.

The electrical resistivity ( m ) of the PM material is the reciprocal of conductivity .

The relationship between the parts density, conductivity and resistivity is shown below:

Density g/cc
% of theoretical density
conductivity % IACS
resistivity µ O cm
8.92
100
100
1.72
8.00
89.6
89.6
1.91
7.80
87.4

87.4

1.96
7.60
85.2
85.2
2.01
7.40
82.9
82.9

2.07

7.20
80.7
80.7

2.13

7.00
78.4
78.4

2.19

 
The effect of level of porosity on the electrical conductivity of copper.
Correlation between copper density and resistivity.
 
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