Modifications of structural and physical properties induced by swift heavy ions in Gd2Ti2O7 and Y2Ti2O7 pyrochlores

被引：19

作者：

Sellami, N. ^{[1
]}

Sattonnay, G. ^{[1
]}

Grygiel, C. ^{[2
]}

Monnet, I. ^{[2
]}

Debelle, A. ^{[3
]}

Legros, C. ^{[1
]}

Menut, D. ^{[4
]}

Miro, S. ^{[5
]}

Simon, P. ^{[6
]}

Bechade, J. L. ^{[4
]}

Thome, L. ^{[3
]}

机构：

[1] Univ Paris 11, ICMMO LEMHE, F-91405 Orsay, France

[2] Univ Caen, CNRS, CEA, CIMAP, F-14070 Caen 5, France

[3] Univ Paris 11, CNRS, CSNSM, IN2P3, F-91405 Orsay, France

[4] CEA, DEN, Serv Rech Met Appl, F-91191 Gif Sur Yvette, France

[5] CEA, DEN, Serv Rech Met Phys, Lab JANNUS, F-91191 Gif Sur Yvette, France

[6] CNRS, UPR 3079, CEMHTI, F-45071 Orleans 2, France

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2015年 / 365卷

关键词：

Ion irradiation; Pyrochlores; X-ray diffraction; Raman spectroscopy; INDUCED AMORPHIZATION; THERMAL-CONDUCTIVITY; RADIATION TOLERANCE; WASTE FORM; IRRADIATION; PLUTONIUM; OXIDES; TRACKS;

D O I：

10.1016/j.nimb.2015.07.017

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The structural transformations induced by ionization processes in Gd2Ti2O7 and Y2Ti2O7 pyrochlores irradiated with swift heavy ions have been studied using XRD and Raman experiments. Results show that irradiation induces amorphization and that the phase transformation build-up can be accounted for in the framework of a model involving a single-impact mechanism. The radiation induced amorphization build-up is faster in Gd2Ti2O7 than in Y2Ti2O7. Moreover, a decrease of the thermal conductivity (measured by the laser flash method) is induced by irradiation both in Gd2Ti2O7 and Y2Ti2O7. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：371 / 375

页数：5

共 30 条

[1] Photocatalytic activity of R3MO7 and R2Ti2O7 (R = Y, Gd, La;: M = Nb, Ta) for water splitting into H2 and O2 [J].