J Mater Sci Technol ›› 1993, Vol. 9 ›› Issue (1): 32-36.

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Phase Transformations in ZrO_2 after Shock Loading

Sergey N.Kulkov Alexander G.Melnikov Institute of Strength Physics and Materials Science,The Russian Academy.of Science,Siberian Branch,Tomsk,634055,RussiaYanchun ZHOU Shengqi CHEN Zhe QU Institute of Metal Research,Academia Sinica,Shenyang,110015,China   

  • Received:1993-01-28 Revised:1993-01-28 Online:1993-01-28 Published:2009-10-10

Abstract: 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 modify submicron 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. Annealing of powders resulted in reversible transformation to the tetragonal without considerable grain growth up to 1200℃.

Key words: submicron ceramics, nanocrystalline, shock loading, phase transformation