Anomalous compression behavior of similar to 12nm nanocrystalline tio2
文献类型：期刊论文
| 作者 | Wang, Qiming1,2; Li, Shourui2; Peng, Fang1; Lei, Li1; Hu, Qiwei1; Wang, Pei1; Nan, Xiaolong2; Liu, Jing3; Zhu, Wenjun2; He, Duanwei1,2 |
| 刊名 | Journal of applied physics
 |
| 出版日期 | 2017-06-07 |
| 卷号 | 121期号:21页码:7 |
| ISSN号 | 0021-8979 |
| DOI | 10.1063/1.4984918 |
| 通讯作者 | Zhu, wenjun(wjzhu@caep.cn) |
| 英文摘要 | When the grain size decreases, there inevitably exists a critical size (d(c)) where the contribution of surface atoms to the physical properties is competitive with that of the interior atoms, giving rise to a wide variety of new phenomena. the behavior of granular materials near d(c) is particularly interesting because of the crossover, a continuous transition from one type of mechanism to another. in situ high-pressure x-ray diffraction experiments showed that the compression curve of nanocrystalline anatase tio2 with grain size near d(c) reached a platform after about 5%-6% of deformation under hydrostatic compression. eventually, the unit cell volume of anatase expanded at similar to 14-16 gpa. we propose that the anomalous compression behavior is attributed to the formation and thickening of the stiff high density amorphous shell under high pressure, giving rise to a great arching effect at the grain boundary at the nanolevel. this process results in a remarkable difference in stress between inside and outside of the shell, generating the illusions of the hardening and the negative compressibility. this study offers a new insight into the mechanical properties of nanomaterials under extreme conditions. published by aip publishing. |
| WOS关键词 | X-RAY-DIFFRACTION ; HIGH-PRESSURE ; ANATASE TIO2 ; CATION MIGRATION ; SIZE ; TRANSITION ; STABILITY ; EXPANSION ; NANOPARTICLES ; GPA |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Applied |
| 语种 | 英语 |
| 出版者 | AMER INST PHYSICS |
| WOS记录号 | WOS:000407490100005 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2176967 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Zhu, Wenjun |
| 作者单位 | 1.Sichuan Univ, Inst Atom & Mol Phys, Chengdu 610065, Sichuan, Peoples R China 2.China Acad Engn Phys, Inst Fluid Phys, Mianyang 621900, Peoples R China 3.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Qiming,Li, Shourui,Peng, Fang,et al. Anomalous compression behavior of similar to 12nm nanocrystalline tio2[J]. Journal of applied physics,2017,121(21):7. |
| APA | Wang, Qiming.,Li, Shourui.,Peng, Fang.,Lei, Li.,Hu, Qiwei.,...&He, Duanwei.(2017).Anomalous compression behavior of similar to 12nm nanocrystalline tio2.Journal of applied physics,121(21),7. |
| MLA | Wang, Qiming,et al."Anomalous compression behavior of similar to 12nm nanocrystalline tio2".Journal of applied physics 121.21(2017):7. |
入库方式： iSwitch采集
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。