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The effects of shock loading on the morphology,grain growth during heating and phase transforma-tion of ZrO_2 have been investigated.It is shown that shock loading may be efficiently used to modifysubmicron ceramic powders with nanocrystalline structure.After shock loading,the critical diameterof ZrO_2 particles transformed from tetragonal to monoclinic decreased due to stored strain energy.Annealing of powders resulted in reversible transformation to the tetragonal without considerablegrain growth up to 1200℃.
The effects of shock loading on the morphology, grain growth during heating and phase transforma- tion of ZrO 2 have been investigated. It is shown that shock loading may be efficiently used to modifysubmicron ceramic powders with nanocrystalline structure. After shock loading, the critical diameter of ZrO 2 particles transformed from tetragonal to monoclinic decreased due to stored strain energy. An increasing of the powder resulted in reversible transformation to the tetragonal without considerablegrain growth up to 1200 ° C.