Radiation stability of Gd2Zr2O7: Effect of stoichiometry and structure

被引：33

作者：

Kumari, Renu ^{[1
]}

Kulriya, P. K. ^{[1
]}

Grover, V. ^{[2
]}

Shukla, R. ^{[2
]}

Saravanan, K. ^{[1
]}

Mohapatra, S. ^{[3
]}

Tyagi, A. K. ^{[2
]}

Avasthi, D. K. ^{[1
]}

机构：

[1] Inter Univ Accelerator Ctr, Div Mat Sci, New Delhi 110067, India

[2] Bhabha Atom Res Ctr, Div Chem, Bombay 400085, Maharashtra, India

[3] GGS Indraprastha Univ, Univ Sch Basic & Appl Sci, New Delhi 110078, India

来源：

CERAMICS INTERNATIONAL | 2016年 / 42卷 / 01期

关键词：

Gd2Zr2O7; Swift heavy ions irradiation; in-situ X-Ray diffraction; Raman spectroscopy; RRBS; HEAVY-ION IRRADIATION; COMPLEX OXIDES; WASTE FORM; PYROCHLORES; A(2)B(2)O(7); ACTINIDES; ZIRCONATE; TOLERANCE; PLUTONIUM; BEHAVIOR;

D O I：

10.1016/j.ceramint.2015.08.007

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The dependence of radiation stability of Gd2Zr2O7 on stoichiometry and structure under swift heavy ion irradiation was investigated. Gd2Zr2O7, lies on the borderline of pyrochlore to fluorite phase transition, hence, it is highly sensitive to variations in the composition and/or synthesis conditions. The Gd2Zr2O7 was synthesized in two sets (Set-A and -B) by solid state synthesis and gel combustion yielding different phases and stoichiometry as confirmed by Resonant Rutherford backscattering spectrometry (RRBS) and field emission scanning electron microscopy (FESEM). Both sets of Gd2Zr2O7 were irradiated with 120 MeV Au ions with fluences varying from 3 x 10(11) to 1 x 10(14) ions/cm(2). The pristine and irradiated samples were studied by X-ray diffraction (XRD) and Raman spectroscopy. The Set-A sample with pyrochlore structure remained crystalline upto the highest fluence 10(14) ions/cm(2) employed, whereas Set-B sample having anion-deficient fluorite structure lost crystallinity at the fluence of 5 x 10(13) ions/cm(2), as revealed by in-situ XRD experiment. The in-situ XRD along with Raman studies elucidated that sample synthesized using solid state reaction process exhibits better stability under swift heavy ion irradiation, implying that the sample with perfect stoichiometric pyrochlore structure possess better radiation stability. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：103 / 109

页数：7

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