IN-SITU TEM STUDY OF ION-INDUCED AMORPHIZATION AT LOW-TEMPERATURE IN AL3TI

被引：4

作者：

JAOUEN, C ^{[1
]}

DENANOT, MF ^{[1
]}

RIVIERE, JP ^{[1
]}

RUAULT, MO ^{[1
]}

SALOME, M ^{[1
]}

机构：

[1] CSNSM,IN2P3,CNRS,F-91405 ORSAY,FRANCE

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1993年 / 80-1卷

关键词：

D O I：

10.1016/0168-583X(93)96145-3

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Phase modifications induced at low temperature (T less-than-or-equal-to 40 K) in Al3Ti by ion irradiation were investigated by in situ transmission electron microscopy (TEM). Irradiation with heavy ions induces a complete amorphization at a dose of approximately 1 dpa. After partial chemical disordering, a crystalline phase change from the DO22 structure into the L1(2) structure is observed only after the onset of amorphization. These results suggest that a lattice strain release is produced by the amorphization process allowing the transition towards a higher symmetry phase. On the other hand, light ion irradiation leads to partial chemical disordering and to strong lattice distortions, but the transition c-a is not completely achieved at doses higher than 2 dpa.

引用

页码：386 / 389

页数：4

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