Increasing the efficiency of using capillary-porous powder materials. II. Materials with steady capillary flow

1991 ◽  
Vol 30 (5) ◽  
pp. 407-411 ◽  
Author(s):  
V. K. Sheleg
Keyword(s):  
Capillary Flow ◽  
Powder Materials ◽  
Porous Powder

Electron microscopy study of shock synthesis of silicides

1993 ◽  
Vol 51 ◽  
pp. 1162-1163
Author(s):  
Kenneth S. Vecchio
Keyword(s):  
Shock Wave ◽  
Plastic Deformation ◽  
Close Contact ◽  
Microscopy Study ◽  
High Energy ◽  
Electron Microscopy Study ◽  
Powder Materials ◽  
Porous Powder ◽  
Wave Effects ◽  
Wave Passage

Shock-induced reactions (or shock synthesis) have been studied since the 1960’s but are still poorly understood, partly due to the fact that the reaction kinetics are very fast making experimental analysis of the reaction difficult. Shock synthesis is closely related to combustion synthesis, and occurs in the same systems that undergo exothermic gasless combustion reactions. The thermite reaction (Fe2O3 + 2Al -> 2Fe + Al2O3) is prototypical of this class of reactions. The effects of shock-wave passage through porous (powder) materials are complex, because intense and non-uniform plastic deformation is coupled with the shock-wave effects. Thus, the particle interiors experience primarily the effects of shock waves, while the surfaces undergo intense plastic deformation which can often result in interfacial melting. Shock synthesis of compounds from powders is triggered by the extraordinarily high energy deposition rate at the surfaces of the powders, forcing them in close contact, activating them by introducing defects, and heating them close to or even above their melting temperatures.

Influence of the structural properties of porous powder materials on the uniformity of local permeability

1988 ◽  
Vol 27 (9) ◽  
pp. 715-716
Author(s):  
P. A. Vityaz' ◽  
V. M. Kaptsevich ◽  
V. K. Sheleg ◽  
V. V. Savich ◽  
A. G. Kostornov ◽  
...  
Keyword(s):  
Structural Properties ◽  
Powder Materials ◽  
Porous Powder ◽  
Local Permeability

Sintering kinetics of capillary-porous powder materials

1993 ◽  
Vol 32 (6) ◽  
pp. 486-490
Author(s):  
L. I. Tuchinskii ◽  
M. B. Shtern ◽  
S. A. Zakharov
Keyword(s):  
Powder Materials ◽  
Porous Powder ◽  
Sintering Kinetics ◽  
Kinetics Of

Porous powder materials with lyophilic additions

1985 ◽  
Vol 24 (11) ◽  
pp. 863-867
Author(s):  
P. A. Vityaz' ◽  
V. K. Sheleg ◽  
V. M. Aleksandrov ◽  
V. V. Mazyuk ◽  
N. V. Gubareva
Keyword(s):  
Powder Materials ◽  
Porous Powder

Aspects of the formation of porous powder materials with variable pore distribution in a pseudofluidized bed

1991 ◽  
Vol 30 (12) ◽  
pp. 1007-1011
Author(s):  
V. K. Sheleg ◽  
V. M. Kaptsevich ◽  
A. E. Galkin ◽  
Yu. S. Teplitskii ◽  
A. N. Sorokina ◽  
...  
Keyword(s):  
Pore Distribution ◽  
Powder Materials ◽  
Porous Powder
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