Ion irradiation-induced phase transformation of pyrochlore and zirconolite

被引：172

作者：

Wang, SX ^{[1
]}

Wang, LM

Ewing, RC

Was, GS

Lumpkin, GR

机构：

[1] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA

[2] Australian Nucl Sci & Technol Org, Adv Mat Div, Menai, NSW 2234, Australia

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1999年 / 148卷 / 1-4期

关键词：

amorphization; pyrochlore; zirconolite; irradiation; disordering;

D O I：

10.1016/S0168-583X(98)00847-7

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Pyrochlore (Gd2Ti2O7) and zirconolite (CaZrTi2O7) were irradiated with 1.5 MeV Xe+. 1.0 MeV Kr. and 0.6 MeV Ar- at temperatures from 20 to 1073 K. Critical amorphization dose increased with increasing temperature. Heavier ion irradiation increased the critical temperature. The extrapolated critical temperatures for amorphization were calculated as: 1300. 1100 and 950 K for pyrochlore irradiated with 1.5 MeV Xe+, 1.0 MeV Kr+ and 0.6 MeV Ar-, respectively; 710 and 654 K for zirconolite irradiated with 1.5 MeV Xe+ and 1.0 MeV Kr+. respectively. At the early stage of irradiation, pyrochlore transformed to a disordered fluorite structure: monoclinic zirconolite first transformed to partially disordered cubic pyrochlore structure followed by a disordered fluorite structure. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：704 / 709

页数：6

共 16 条

[1] INSITU ION IRRADIATION IMPLANTATION STUDIES IN THE HVEM-TANDEM FACILITY AT ARGONNE-NATIONAL-LABORATORY [J].

ALLEN, CW ;

FUNK, LL ;

RYAN, EA ;

TAYLOR, A .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1989, 40-1 :553-556

[2] ALPHA-DECAY SELF-IRRADIATION DAMAGE IN PU-238-SUBSTITUTED ZIRCONOLITE [J].

CLINARD, FW ;

HOBBS, LW ;

LAND, CC ;

PETERSON, DE ;

ROHR, DL ;

ROOF, RB .

JOURNAL OF NUCLEAR MATERIALS, 1982, 105 (2-3) :248-256

[3]

Ewing RC, 1996, NATO SCI S 1 DISARM, V4, P65

[4] AMORPHIZATION OF ZIRCONOLITE - ALPHA-DECAY EVENT DAMAGE VERSUS KRYPTON ION IRRADIATION [J].

EWING, RC ;

WANG, LM .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1992, 65 (1-4) :319-323

[5]

EWING RC, 1987, MRS BULL, V12, P58

[6] THE STRUCTURE OF APERIODIC, METAMICT (CA,TH)ZRTI2O7 (ZIRCONOLITE) - AN EXAFS STUDY OF THE ZR-SITES, TH-SITES AND U-SITES [J].

FARGES, F ;

EWING, RC ;

BROWN, GE .

JOURNAL OF MATERIALS RESEARCH, 1993, 8 (08) :1983-1995

[7]

LUMPKIN GR, 1988, PHYS CHEM MINER, V16, P2

[8]

LUMPKIN GR, 1994, RADIOCHIM ACTA, V66-7, P469

[9]

Lumpkin GR, 1996, MATER RES SOC SYMP P, V412, P329

[10]

LUMPKIN GR, 1989, MATER RES SOC S P, V127, P253

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