caa a22 4500 465799078 CHVBK 20180323112047.0 cr unu---uuuuu 170327e19900301xx s 000 0 eng 10.1007/BF00797960 doi (NATIONALLICENCE)springer-10.1007/BF00797960 Interrelationship between the properties of powders, the conditions of pressing and sintering, and the structure of porous niobium [Elektronische Daten] I. The influence of the original powders and the pressing conditions on the forming of the porous structure of a material of niobium [Yu. Levinskii, A. Zaitsev, Ya. Polyakov, Yu. Patrikeev] Conclusions: With an increase in niobium powder particle size the pressability increases while the formability decreases. There is a linear relationship between the normalized radius of the pores in high-porosity niobium powder specimens and the normalized volume of the pores. This is an indication of geometric similarity of the disposition and form of the pores in specimens pressed from niobium powders with different degrees of dispersion. The product of the coefficient of side pressure ɛ and the coefficient of friction on the die wallμ is 0.053 ± 0.10. This means that with reasonable values of ɛ the coefficient of friction of dispersed niobium powder on the wall of the steel die is 0.14. Plenum Publishing Corporation, 1990 Levinskii Yu Moscow Institute for Precision Chemical Technology, USSR aut Zaitsev A. Moscow Institute for Precision Chemical Technology, USSR aut Polyakov Ya Moscow Institute for Precision Chemical Technology, USSR aut Patrikeev Yu Moscow Institute for Precision Chemical Technology, USSR aut Soviet Powder Metallurgy and Metal Ceramics Kluwer Academic Publishers-Plenum Publishers 29/3(1990-03-01), 197-200 0038-5735 29:3<197 1990 29 11106 https://doi.org/10.1007/BF00797960 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00797960 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Levinskii Yu Moscow Institute for Precision Chemical Technology, USSR aut NATIONALLICENCE 700 1- Zaitsev A. Moscow Institute for Precision Chemical Technology, USSR aut NATIONALLICENCE 700 1- Polyakov Ya Moscow Institute for Precision Chemical Technology, USSR aut NATIONALLICENCE 700 1- Patrikeev Yu Moscow Institute for Precision Chemical Technology, USSR aut NATIONALLICENCE 773 0- Soviet Powder Metallurgy and Metal Ceramics Kluwer Academic Publishers-Plenum Publishers 29/3(1990-03-01), 197-200 0038-5735 29:3<197 1990 29 11106 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 465798624 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer