Size-Dependent Amorphization of Nanoscale Y2O3 at High Pressure

被引：82

作者：

Wang, Lin ^{[1
,2
]}

Yang, Wenge ^{[1
,3
]}

Ding, Yang ^{[1
]}

Ren, Yang ^{[4
]}

Xiao, Siguo ^{[5
]}

Liu, Bingbing ^{[2
]}

Sinogeikin, Stanislav V. ^{[3
]}

Meng, Yue ^{[3
]}

Gosztola, David J. ^{[6
]}

Shen, Guoyin ^{[3
]}

Hemley, Russell J. ^{[7
]}

Mao, Wendy L. ^{[8
,9
]}

Mao, Ho-kwang ^{[1
,3
,7
]}

机构：

[1] Carnegie Inst Washington, HPSynC, Argonne, IL 60439 USA

[2] Jilin Univ, State Key Lab Superhard Mat, Changchun 130012, Peoples R China

[3] Carnegie Inst Washington, HPCAT, Argonne, IL 60439 USA

[4] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[5] Xiangtan Univ, Inst Nanophys & Rare Earth Luminescence, Xiangtan 411105, Peoples R China

[6] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA

[7] Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA

[8] Stanford Univ, Stanford, CA 94305 USA

[9] SLAC Natl Accelerator Lab, Photon Sci & Stanford Inst Mat & Energy Sci, Menlo Pk, CA 94025 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 09期

基金：

美国国家科学基金会;

关键词：

PHASE-TRANSITION; NANOCRYSTALLINE;

D O I：

10.1103/PhysRevLett.105.095701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Y2O3 with particle sizes ranging from 5 nm to 1 mu m were studied at high pressure using x-ray diffraction and Raman spectroscopy techniques. Nanometer-sized Y2O3 particles are shown to be more stable than their bulk counterparts, and a grain size-dependent crystalline-amorphous transition was discovered in these materials. High-energy atomic pair distribution function measurements reveal that the amorphization is associated with the breakdown of the long-rang order of the YO6 octahedra, while the nearest-neighbor edge-shared octahedral linkages are preserved.

引用

页数：4

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