Isometric with the ordered, pyrochlore structure has an extremely high resistance to radiation-induced amorphization. Ion-beam irradiations at keV to GeV energies result in a disordered, defect-fluorite structure that remains crystalline to very large fluences. However, we report liquid-like phase formation of droplet-like surface hillocks and quenched molten tracks in . The extremely high energy density of 12-MeV clusters creates tracks with substantial volumes of amorphous material, accompanied by the formation of nanocrystals of the disordered, defect-fluorite structure. This is the first evidence of irradiation-induced amorphization of . In contrast, irradiation of pyrochlore with swift heavy ions of U resulted in an order-disorder transformation to defect-fluorite without any evidence of amorphization. Thermal-spike calculations highlight the dominance of the effect of deposited energy density, controlled by the projectile velocity, as compared with the energy loss.
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1 June 2009
Research Article|
June 03 2009
Liquid-like phase formation in by extremely ionizing irradiation
Jiaming Zhang;
Jiaming Zhang
1Departments of Geological Sciences and Materials Science and Engineering,
University of Michigan
, Ann Arbor, Michigan 48109-1005, USA
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Maik Lang;
Maik Lang
1Departments of Geological Sciences and Materials Science and Engineering,
University of Michigan
, Ann Arbor, Michigan 48109-1005, USA
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Jie Lian;
Jie Lian
2Department of Mechanical, Aerospace and Nuclear Engineering,
Rensselaer Polytechnic Institute
, Troy, New York 12180, USA
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Jie Liu;
Jie Liu
3Institute of Modern Physics,
Chinese Academy of Sciences
, Lanzhou 730000, People’s Republic of China
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Christina Trautmann;
Christina Trautmann
4GSI,
Helmholtzzentrum für Schwerionenforschung
, Planckstr.1, 64291 Darmstadt, Germany
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Serge Della-Negra;
Serge Della-Negra
5
Institut de Physique Nucléaire (IPN)
, CNRS-IN2P3, 91406 Orsay, France
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Marcel Toulemonde;
Marcel Toulemonde
6Centre de Recherche sur les Ions, les Matériaux et la Photonique,
CEA-CNRS-ENSICAEN-Univ. de Caen
, 14070 Caen, France
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Rodney C. Ewing
Rodney C. Ewing
a)
1Departments of Geological Sciences and Materials Science and Engineering,
University of Michigan
, Ann Arbor, Michigan 48109-1005, USA
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Jiaming Zhang
1
Maik Lang
1
Jie Lian
2
Jie Liu
3
Christina Trautmann
4
Serge Della-Negra
5
Marcel Toulemonde
6
Rodney C. Ewing
1,a)
1Departments of Geological Sciences and Materials Science and Engineering,
University of Michigan
, Ann Arbor, Michigan 48109-1005, USA
2Department of Mechanical, Aerospace and Nuclear Engineering,
Rensselaer Polytechnic Institute
, Troy, New York 12180, USA
3Institute of Modern Physics,
Chinese Academy of Sciences
, Lanzhou 730000, People’s Republic of China
4GSI,
Helmholtzzentrum für Schwerionenforschung
, Planckstr.1, 64291 Darmstadt, Germany
5
Institut de Physique Nucléaire (IPN)
, CNRS-IN2P3, 91406 Orsay, France
6Centre de Recherche sur les Ions, les Matériaux et la Photonique,
CEA-CNRS-ENSICAEN-Univ. de Caen
, 14070 Caen, France
a)
Electronic mail: [email protected].
J. Appl. Phys. 105, 113510 (2009)
Article history
Received:
December 25 2008
Accepted:
March 25 2009
Citation
Jiaming Zhang, Maik Lang, Jie Lian, Jie Liu, Christina Trautmann, Serge Della-Negra, Marcel Toulemonde, Rodney C. Ewing; Liquid-like phase formation in by extremely ionizing irradiation. J. Appl. Phys. 1 June 2009; 105 (11): 113510. https://doi.org/10.1063/1.3124370
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