Superplasticity of Al2O3-ZrO2 (3Y) composite doped with different amounts of TiO2
Compression deformation behavior and mechanism of Al2O3-ZrO2 (3Y) composite ceramics doped with four different amounts of TiO2 (0,1,4,and 8 wt.%,designated as 0T,1T,4T,and 8T) were systematically investigated in this work.It was found out that the strain rate significantly increased by doping TiO2 addition.Then the microstructure of the ceramic before and after deformation was examined.There was serious texture in deformed microstructure in 0T and 1T,while there was light texture in 4T and no texture in 8T after the deformation.Moreover,liquid phases (about 50–100 nm) were observed along the edge facets and at the junction pockets in deformed 4T and 8T specimens.Based on the microstructural features and deformation behavior,it is suggested that for 0T and 1T,the deformation mechanism was texture-controlled grain boundary sliding accompanied by diffusion;for 4T and 8T,it was grain boundary sliding accompanied by the liquid phases.
Al2O3-ZrO2 (3Y) ceramic superplastic compression microstructure development TiO2 dopants deformation mechanism
Chen Guoqing Zu Yufei Fu Xuesong Zhou Wenlong
School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085, P.R. China
国际会议
第五届亚洲微纳成形技术研讨会(AMMFT2012)暨第三届微纳成形学术委员会会议
哈尔滨
英文
39-43
2012-08-01（万方平台首次上网日期，不代表论文的发表时间）