| Autor: |
Ershova, I. O., Dzneladze, Zh. I., Voronin, Yu. V., Karasev, V. M., Fedoseev, G. K. |
| Zdroj: |
Powder Metallurgy and Metal Ceramics; March 1977, Vol. 16 Issue: 3 p179-183, 5p |
| Abstrakt: |
1.It is shown that in the whole pressure range investigated (9–180 kg/mm2) coarse-grained spherical tungsten powders surpass standard fine-grained powders in compressibility.2.In a wide pressure range (from 9 to 100–150 kg/mm2) the compressibility of the powders investigated is satisfactorily described by M. Yu. Bal'shin's second equation. The limiting pressure below which this equation is applicable falls with increase in the relative density of powders.3.For spherical powders the character of density, microstress, and electrical resistivity vs compaction pressure curves changes at pressures above 100 kg/mm2, which is apparently indicative of a change in the mechanism of their densification. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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