Review of A2B2O7 pyrochlore response to irradiation and pressure

被引:222
作者
Lang, Maik [1 ]
Zhang, Fuxiang [1 ]
Zhang, Jiaming [1 ]
Wang, Jianwei [1 ]
Lian, Jie [2 ]
Weber, William J. [3 ]
Schuster, Beatrice [4 ]
Trautmann, Christina [4 ]
Neumann, R. [4 ]
Ewing, Rodney C. [1 ]
机构
[1] Univ Michigan, Dept Geol Sci, Ann Arbor, MI 48109 USA
[2] Rensselaer Polytech Inst, Dept Mech Aerosp & Nucl Engn, Troy, NY 12180 USA
[3] Pacific NW Natl Lab, Richland, WA 99352 USA
[4] GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany
关键词
HEAVY-ION IRRADIATION; INDUCED AMORPHIZATION; RADIATION TOLERANCE; WASTE FORM; BEAM IRRADIATION; PLUTONIUM; IMMOBILIZATION; STABILITY; GD2TI2O7; OXIDES;
D O I
10.1016/j.nimb.2010.05.016
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
This article reviews recent research on swift heavy-ion irradiations and high-pressure studies on pyrochlores of the Gd2Zr2-xTixO7 binary [1-4]. Applying three complementary analytical techniques (synchrotron X-ray diffraction, Raman spectroscopy and transmission electron microscopy) allowed for the investigation of the response of pyrochlore to irradiation and/or pressure. The chemical composition of pyrochlore has a strong effect on the character and energetics of the type of structural modifications that can be obtained under pressure or irradiation: For Ti-rich pyrochlores, the crystalline-to-amorphous transition is the dominant process. When Zr is substituted for Ti, an order-disorder transformation to the defect-fluorite structure becomes the increasingly dominant process. Except for Gd2Zr2O7, single ion tracks in pyrochlore consist of an amorphous core, surrounded by a crystalline, but disordered, defect-fluorite shell. This shell is surrounded by a defect-rich pyrochlore region. In contrast to similar effects observed when pressure or irradiation are applied separately, the response of the pyrochlore structure is significantly different when it is exposed simultaneously to pressure and irradiation. The combination of relativistic heavy ions with high pressure results in the formation of a new metastable pyrochlore phase. TEM and quantum-mechanical calculations suggest that these novel structural modifications are caused by the formation of nanocrystals and the modified energetics of nanomaterials. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:2951 / 2959
页数:9
相关论文
共 49 条
  • [1] Heavy-ion irradiation effects in Gd2(Ti2-xZrx)O7 pyrochlores
    Begg, BD
    Hess, NJ
    McCready, DE
    Thevuthasan, S
    Weber, WJ
    [J]. JOURNAL OF NUCLEAR MATERIALS, 2001, 289 (1-2) : 188 - 193
  • [2] Heavy-ion irradiation effects on structures and acid dissolution of pyrochlores
    Begg, BD
    Hess, NJ
    Weber, WJ
    Devanathan, R
    Icenhower, JP
    Thevuthasan, S
    McGrail, BP
    [J]. JOURNAL OF NUCLEAR MATERIALS, 2001, 288 (2-3) : 208 - 216
  • [3] Heavy-ion induced damage in fluorite nanopowder
    Boccanfuso, M
    Benyagoub, A
    Toulemonde, M
    Trautmann, C
    Schwartz, K
    Dufour, C
    [J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2001, 175 : 590 - 593
  • [4] SYSTEMATICS OF THE PYROCHLORE STRUCTURE TYPE, IDEAL A2B2X6Y
    CHAKOUMAKOS, BC
    [J]. JOURNAL OF SOLID STATE CHEMISTRY, 1984, 53 (01) : 120 - 129
  • [5] High-pressure behavior of CdSb: Compound decomposition, phase formation, and amorphization
    Degtyareva, Valentina F.
    Degtyareva, Olga
    Mao, Ho-kwang
    Hemley, Russell J.
    [J]. PHYSICAL REVIEW B, 2006, 73 (21)
  • [6] Glass matrix/pyrochlore phase composites for nuclear wastes encapsulation
    Digeos, AA
    Valdez, JA
    Sickafus, KE
    Atiq, S
    Grimes, RW
    Boccaccini, AR
    [J]. JOURNAL OF MATERIALS SCIENCE, 2003, 38 (08) : 1597 - 1604
  • [7] Nuclear waste disposal-pyrochlore (A2B2O7):: Nuclear waste form for the immobilization of plutonium and "minor" actinides
    Ewing, RC
    Weber, WJ
    Lian, J
    [J]. JOURNAL OF APPLIED PHYSICS, 2004, 95 (11) : 5949 - 5971
  • [8] Phase transitions in solids stimulated by simultaneous exposure to high pressure and relativistic heavy ions
    Glasmacher, UA
    Lang, M
    Keppler, H
    Langenhorst, F
    Neumann, R
    Schardt, D
    Trautmann, C
    Wagner, GA
    [J]. PHYSICAL REVIEW LETTERS, 2006, 96 (19)
  • [9] Two-dimensional detector software: From real detector to idealised image or two-theta scan
    Hammersley, AP
    Svensson, SO
    Hanfland, M
    Fitch, AN
    Hausermann, D
    [J]. HIGH PRESSURE RESEARCH, 1996, 14 (4-6) : 235 - 248
  • [10] Enthalpies of formation of Ce-pyrochlore, Ca0.93Ce1.00Ti2.035O7.00, U-pyrochlore, Ca1.46U0.234+U0.466+Ti1.85O7.00 and Gd-pyrochlore, Gd2Ti2O7:: three materials relevant to the proposed waste form for excess weapons plutonium
    Helean, KB
    Navrotsky, A
    Vance, ER
    Carter, ML
    Ebbinghaus, B
    Krikorian, O
    Lian, J
    Wang, LM
    Catalano, JG
    [J]. JOURNAL OF NUCLEAR MATERIALS, 2002, 303 (2-3) : 226 - 239