The effect of technological factors on the density and strength of sintered refractory metals
1965
1.
The optimum compacting pressures for niobium and molybdenum are 4000–6000 daN/cm2.
2.
The maximum compact density is secured under the following sintering conditions:
a)
for molybdenum: temperature 2173°K, isothermal holding for 4–5 h, environment-hydrogen;
b)
for niobium: temperature 2173°K, isothermal holding for 3–4 h, vacuum of 0.133 N/m2(l ·10−3mmHg).
3.
Molybdenum and, particularly, niobium show little tendency to strength loss in the temperature range 293-1473°K.
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