Model of Fracture, Friction, and Wear Phenomena of Porous Iron
Table 1
The dependence of powder materials fracture toughness on porosity and sample thickness.
Number of the composition
Composition
Atmosphere and sintering mode
Porosity, %
The sample thickness, mm
Fracture toughness, MN/m3/2
1
15
2.80
9.5
2
13
4.60
10.0
Sample sizes: mm
10.0
3
PZh4M2
Vacuum, 1200°C, 2 h
10
5.50
10.5
4
9
6.45
10.0
5
10
9.75
9.5
6
OSCh 6-2
Hydrogen, 1200°C, 2 h
3.6
4.30
23.9
7
4.0
7.55
23.8
8
7.3
4.80
19.1
9
7.5
9.10
18.9
Note: The iron grade OSCh 6-2—the average particle size is 5 μm, the carbon content is less than 0.02% in mass, the total concentration of other impurities is less than 0.001%.
