Properties of powders
The above-described methods
allow production of powders from metals
(Sn, Pb, Zn, Mg, Al, Cu, etc) and alloys
(Cu-Sn, Al-Cu-Si, Fe-C, Fe-Nd-B, etc)
having low oxygen content (0,08 mass %,
maximum), with particle size from 10 to
300 mkm and granule dimension from 500
to 1000 mkm. Figure 1 shows particle size
distribution of powders produced under
pressure P and with gas consumption Q.
Figure
1
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These powders and granules
are distinguished for a high
dimension homogeneity of particles.
The particles can be varied
in shape from whiskers and
flakes to spherical. High
cooling rates ensure microcrystalline
or amorphouse structure of
the powder particles.
m -particle weight,%; d -
particle size, mkm; A- Sn;
CPA; P=1.2 MPa; Q=0.07 m3/kg;
B -bronze; 60%Cu; 40%Sn; CPA;
P=1.2 MPa; Q=0.06 m3/kg;
C- brass; 61% Cu; 37.5% Zn;
1.5% Pb; CPA; P=1.2 MPa; Q=0.05
m3/kg;
D- Sn; CHA; P=1.2 MPa; Q=0.005
m3/kg;
E- Al; CPA; P=1.2 MPa; Q=0.05
m3/kg;
F- Mg; CPA; P=1.2 MPa; Q=0.007
m3/kg;
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