کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1517437 | 1511604 | 2008 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Mechanical properties of bulk and nanoscale TiO2 phases Mechanical properties of bulk and nanoscale TiO2 phases](/preview/png/1517437.png)
The mechanical properties of bulk and nanoscale TiO2 phases are examined with a view to assess the available bulk modulus and hardness data, and to understand the size-dependent behaviors. The bulk modulus values of thermodynamically stable bulk TiO2 phases show a general correlation with Ti–O coordination number. As with the cotunnite-structured (OII) phase, it is likely that the seven-coordinated OI and eight-coordinated fluorite forms of TiO2 are ultrahard substances. Of the nanoscale phases investigated thus far, nanocrystalline anatase displays the strongest size dependence of bulk modulus values, with possible stiffening behavior effected by incipient grain boundary amorphization under pressure. Nanocrystalline rutile and baddeleyite phases do not show appreciable size dependence in their compression behaviors.
Journal: Journal of Physics and Chemistry of Solids - Volume 69, Issue 9, September 2008, Pages 2332–2335