STRUCTURAL AND PHASE CHANGES IN COPPER, COBALT, AND TITANIUM OXIDE POWDERS SUBJECTED TO SHOCK WAVES

摘要

Powders TiO_2, CuO, Cu_2O, and CoO mixed with inert filler are subjected to shock waves in cylindrical preservation devices. The shock waves are generated by the explosion of TG40 charge at a detonation speed of 7.8 km/sec and detonation wave pressure of 28 GPa. It is established that shock-wave processing of oxide powders leads to changes in particle-size distribution since coarse and medium particles are crushed, coherent scattering regions become smaller, and concentration of phase distortions increases. Phase transformation of rutile into denser orthorhombic modification occurs in TiO_2, and the content of phases with higher oxygen amount increases in Cu_2O and CoO.