Phase Transformations in ZrO_2 after Shock Loading  

作　　者：Sergey N.Kulkov Alexander G.Melnikov 

机构地区：[1]Institute of Strength Physics and Materials Science.

出　　处：《Journal of Materials Science & Technology》1993年第1期32-36,共5页材料科学技术（英文版）

摘　　要：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℃.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℃.

关 键 词：submicron ceramics NANOCRYSTALLINE shock loading phase transformation 

分 类 号：TB3-55[一般工业技术—材料科学与工程]