Is it feasible to determine the bonding charge density of stoichiometric γ-TiAl through structure factor measurements?
作者:
AlanG. Fox,
期刊:
Philosophical Magazine Letters
(Taylor Available online 1993)
卷期:
Volume 68,
issue 1
页码: 29-37
ISSN:0950-0839
年代: 1993
DOI:10.1080/09500839308242273
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
All the experimental methods for the measurement of structure factors are reviewed with emphasis on determining the electron charge-density distributions of intermetallic alloys, in particular γ-TiAl. The techniques discussed include X-ray diffraction, X-ray pendellösung methods, γ-ray diffraction and high-energy electron diffraction (intersecting Kikuchi line, critical voltage and convergent-beam rocking-curve procedures). All these methods (except for electron diffraction) require high-quality single crystals which seem impossible to prepare for equiatomic γ-TiAl. However, the critical-voltage electron diffraction measurements presented in this work indicate that the 001, 110, 111, 200, 002, 220 and 202 structure factor amplitudes of stoichiometric γ-TiAl can be determined with sufficient accuracy for a charge-density study provided that great care is taken.
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