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

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;