SHOCK-WAVE COMPACTING OF POWDERS

Compacting of Metal Powders

Shock wave initiation of the Ti5Si3 reaction in elemental powders

Elemental powder mixes were subjected to plane-wave shock processing which reduced the initial porosity to essentially zero. Two powder mixes in a 5:3 Ti:Si atomic ratio were used: 2325 mesh Ti and Si ~,45 mm!, and 2100 mesh Ti and Si ~,150 mm! with shock pressures up to 7.3 GPa and shock energies up to 671 J/g. Shock pressures were calculated using hugoniot parameters for porous elemental powd...

Periodic Wave Shock solutions of Burgers equations

In this paper we investigate the exact peroidic wave shock solutions of the Burgers equations. Our purpose is to describe the asymptotic behavior of the solution in the cauchy problem for viscid equation with small parametr ε and to discuss in particular the case of periodic wave shock. We show that the solution of this problem approaches the shock type solution for the cauchy problem of the in...

Thermoelectric measurements of energy deposition during shock-wave consolidation of metal powders of several sizes

The degree of shock energy localization within individual particles and between neighboring particles of diierent size was explored during shock-wave consolidation of spherical metal powders. The thermoelectric voltage generated by the passage of a shock wave through a copper powder-constantan powder interface was recorded. The sizes of the copper and constantan powders were varied between mean...

Application of the Electromagnetic Impulses for Joining of Details and Compacting of Powders

The basic physics and technological aspects of application of the electromagnetic impulses for the obtaining of permanent connections from pipes, for compacting of powders and for shaping of details from metallic and nonmetallic materials are analyzed. The recommendations on choice of parameters of the equipment (pulsed electromagnetic fields generator) and of the tool (magnetic coil) for the a...