HRTEM STUDY OF DISPLACEMENT CASCADE DAMAGE IN KRYPTON-ION-IRRADIATED SILICATE OLIVINE

被引：19

作者：

WANG, LM

MILLER, ML

EWING, RC

机构：

[1] Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque

来源：

ULTRAMICROSCOPY | 1993年 / 51卷 / 1-4期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

D O I：

10.1016/0304-3991(93)90159-U

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

With a 1.5 MeV Kr+-ion irradiation at room temperature, olivine [(Mg0.88Fe0.12)2SiO4] was completely amorphized after a dose of 5.3 x 10(14) ions/cm2, as observed by in situ TEM. After a dose as low as 2.55 x 10(12) ions/cm2, HRTEM revealed damaged domains (approximately 5 nm in dimensions) in which lattice fringes were fuzzy or completely lost at the thin regions of the sample. Multislice image calculations for supercells containing various amounts of amorphous volume and Monte Carlo simulations for displacement cascades indicate that the observed damage domains in the HRTEM image contain 30%-100% amorphous volume through the thickness and are caused by overlapping of the displacement cascades in projection.

引用

页码：339 / 347

页数：9

共 14 条

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