Modeling the kinetics of infiltration of porous powder materials with melts

1996 ◽  
Vol 35 (9-10) ◽  
pp. 536-539
Author(s):  
Yu. N. Kryuchkov
Keyword(s):  
Powder Materials ◽  
Porous Powder ◽  
Kinetics Of

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

Modelling of Recrystallization Curves of Porous Copper-Titanium Powder Materials

2012 ◽  
Vol 715-716 ◽  
pp. 965-970
Author(s):  
Lyudmila Ryabicheva ◽  
Dmytro Usatyuk
Keyword(s):  
Grain Size ◽  
Titanium Powder ◽  
Titanium Content ◽  
Powder Materials ◽  
Porous Powder ◽  
Degree Of Deformation ◽  
Porous Copper ◽  
Deformation Strain Rate ◽  
The Mathematical Model ◽  
Kinetics Of

In this paper, modelling and plotting of recrystallization curves of copper-titanium powder materials with titanium content of 0.5%, porosity 5% and 10%. The mathematical model that describes an influence of temperature, degree of deformation, strain rate, initial grain size and porosity to grain size after deformation has developed. The interconnection of deforming parameters and structure has presented by function of several variables with analytical expression obtained by method of undetermined coefficients based on experimental data. Theoretical recrystallization curves for copper-titanium powder materials with different porosity have plotted. It has established that porosity decelerates the kinetics of structure formation during dynamical softening of porous powder materials.

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

Debinding Kinetics of a Water Soluble Binder System for Titanium Alloys Metal Injection Moulding

2012 ◽  
Vol 520 ◽  
pp. 174-180 ◽  
Author(s):  
Gang Chen ◽  
Guian Wen ◽  
Neil Edmonds ◽  
Peng Cao ◽  
Yi Min Li
Keyword(s):  
Bath Temperature ◽  
Water Soluble ◽  
Specimen Thickness ◽  
Porous Powder ◽  
Binder System ◽  
Alloyed Powder ◽  
Time Intervals ◽  
Binder Removal ◽  
Extraction Behaviour ◽  
Kinetics Of

A water soluble binder system is used to prepare Ti-6Al-4V and NiTi pre-alloyed powder feedstock. The binder dissolution and transport kinetics through the porous powder skeleton are studied for various powder morphologies and powder loadings from 60 to 69.5 vol.%. The binder removal behaviours are evaluated with different debinding time intervals. The focus of this work is to investigate the influences of shaping pressure, specimen thickness and water bath temperature on the binder extraction behaviour.

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