The irradiation effects of Gd2Hf2O7 and Gd2Ti2O7

被引：23
|
作者：
Li, Y. H. [1 ,2 ]
Wen, J. [1 ]
Wang, Y. Q. [2 ]
Wang, Z. G. [3 ]
Tang, M. [2 ]
Valdez, J. A. [2 ]
Sickafus, K. E. [2 ]
机构：
[1] Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China
[2] Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA
[3] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2012年 / 287卷
基金：
中国国家自然科学基金;
关键词：
Gd2Ti2O7; Gd2Hf2O7; Ion irradiation effects; HEAVY-ION IRRADIATION; RADIATION TOLERANCE; INDUCED AMORPHIZATION; PYROCHLORE; A(2)B(2)O(7); FLUORITE; LA2ZR2O7; BOND;
D O I：
10.1016/j.nimb.2012.06.003
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
In this report, we present dramatically different behavior between isostructural Gd2Hf2O7 and Gd2Ti2O7 pyrochlore using 400 keV Ne2+ irradiation under cryogenic conditions (similar to 77 K), in which the lattice volume of the irradiated layer of Gd2Ti2O7 increased with ion fluence up to 1 x 10(15) ions/cm(2), whereas, the lattice volume of the irradiated layer of Gd2Hf2O7 decreased with increasing fluence from 1 x 10(15) to 6 x 10(16) ions/cm(2). The cation radius ratio r(A)/r(B), the bond-type of A-O and B-O bonds, the order-to-disorder transition energy of Gd2Hf2O7 and Gd2Ti2O7, temperature-composition (T-C) phase diagrams of HfO2-Gd2O3 and TiO2-Gd2O3 mixtures were used to explain the response of Gd2Hf2O7 and Gd2Ti2O7 to ion irradiation-induced structure transformation. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：130 / 134
页数：5
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