Stress-induced interaction energies and determination of the atomic structure of ordered bcc interstitial solutions, and of superlattices in tantalum

Journal Article · Mon Sep 01 04:00:00 EDT 1975 · Acta Metall., v. 23, no. 9, pp. 1089-1102

DOI:https://doi.org/10.1016/0036-9748(75)90356-7· OSTI ID:4146343

Khachaturyan, A G; Shatalov, G A

The method of static concentration waves and the theory of stress- induced interactions are used to predict the ordered arrangement of interstitials in bcc host lattice. The cases of impurity atoms occupying either octahedral or tetrahedral interstices are considered. The numerical parameters of the theory are the frequencies of the host lattice vibrations whose wave vectors are equal to the superlattice vectors of the reciprocal lattice, the elastice constants and the distortion tensor of the bcc lattice of the interstitial solution. The calculations allow, e.g., the determination of the atomic arrangement of the tantalum hydrides and suboxides and the atomic displacements in Ta$sub 2$H ordered phase, both being in a good agreement with the previous diffraction studies. (auth)

• Research Organization: Inst. of Crystallography, Moscow
• Sponsoring Organization: USDOE
• NSA Number: NSA-33-007749
• OSTI ID: 4146343
• Journal Information: Acta Metall., v. 23, no. 9, pp. 1089-1102, Journal Name: Acta Metall., v. 23, no. 9, pp. 1089-1102; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

*TANTALUM HYDRIDES-- LATTICE VIBRATIONS
360202* --Materials--Ceramics
Cermets & Refractories-- Structure & Phase Studies
BCC LATTICES
INTERSTITIALS
N50130* --Metals
Ceramics
& Other Materials--Ceramics & Cermets--Properties
Structure & Phase Studies
ORDER PARAMETERS
STRESSES
SUPERLATTICES