Compositional changes associated with periodic antiphase boundaries in the initial stages of ordering in Ni3 Mo1. I. Crystallographic Analysis
1
Rijksuniversitair Centrum, Antwerpen
2
S.C.K.‐C.E.N., Mol
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Publication type: Journal Article
Publication date: 1974-10-16
Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Abstract
The early stages of ordering in Ni3Mo have been studied by electron diffraction and microscopy. A long period superlattice of 13.9 A is observed which can be attributed to a periodic array of non-conservative antiphase boundaries in the Ni3Mo-structure. This superlattice disappears by coarsening of the array after longer annealing times. From the shift of the superlattice reflections the displacement vector associated with the antiphase boundaries could unambigeously be determined as [102] using a method developed earlier for shear structures. This result is in agreement with the structural model and with the displacement vector as derived from image extinctions. Direct evidence is found for the shear transformation from the f.c.c. high temperature phase to the ordered Ni3Mo-structure, which is a superstructure of the h.c.p. structure.
Die fruhen Ordnungszustande in Ni3Mo wurden mit Elektronenmikroskopie und Elektronenbeugung untersucht. Es wird ein lang-periodisches Ubergitter von 13,9 A beobachtet, das einer periodischen Anordnung von nicht-konservativen Antiphasengrenzen in der Ni3Mo-Struktur zugeordnet werden kann. Dieses Ubergitter verschwindet durch Vergroberung der Anordnung nach langerer Temperungsdauer. Aus der Verschiebung der Ubergitter-Reflexionen last sich der Verschiebungsvektor, der mit den Antiphasengrenzen verknupft ist, eindeutig als [102] mit einer Methode bestimmen, die schon fruher fur Scherstrukturen entwickelt wurde. Dieses Ergebnis befindet sich in Ubereinstimmung mit dem Strukturmodell und mit dem aus der Bildextinktion bestimmten Verschiebungsvektor. Es wurde ein direkter Hinweis fur die Schertransformation von der k.f.z.-Hochtemperatur-phase zu der geordneten Ni3Mo-Struktur gefunden, die eine Uberstruktur der h.d.p.-Struktur ist.
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Van Tendeloo G. et al. Compositional changes associated with periodic antiphase boundaries in the initial stages of ordering in Ni3Mo1. I. Crystallographic Analysis // phys stat sol (a). 1974. Vol. 25. No. 2. pp. 697-707.
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Van Tendeloo G., Van Landuyt J., Delavignette P., Amelinckx S. Compositional changes associated with periodic antiphase boundaries in the initial stages of ordering in Ni3Mo1. I. Crystallographic Analysis // phys stat sol (a). 1974. Vol. 25. No. 2. pp. 697-707.
Cite this
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TY - JOUR
DO - 10.1002/pssa.2210250240
UR - https://doi.org/10.1002/pssa.2210250240
TI - Compositional changes associated with periodic antiphase boundaries in the initial stages of ordering in Ni3Mo1. I. Crystallographic Analysis
T2 - phys stat sol (a)
AU - Van Tendeloo, G.
AU - Van Landuyt, J.
AU - Delavignette, P.
AU - Amelinckx, S.
PY - 1974
DA - 1974/10/16
PB - Wiley
SP - 697-707
IS - 2
VL - 25
SN - 0031-8965
SN - 1521-396X
ER -
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@article{1974_Van Tendeloo,
author = {G. Van Tendeloo and J. Van Landuyt and P. Delavignette and S. Amelinckx},
title = {Compositional changes associated with periodic antiphase boundaries in the initial stages of ordering in Ni3Mo1. I. Crystallographic Analysis},
journal = {phys stat sol (a)},
year = {1974},
volume = {25},
publisher = {Wiley},
month = {oct},
url = {https://doi.org/10.1002/pssa.2210250240},
number = {2},
pages = {697--707},
doi = {10.1002/pssa.2210250240}
}
Cite this
MLA
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Van Tendeloo, G., et al. “Compositional changes associated with periodic antiphase boundaries in the initial stages of ordering in Ni3Mo1. I. Crystallographic Analysis.” phys stat sol (a), vol. 25, no. 2, Oct. 1974, pp. 697-707. https://doi.org/10.1002/pssa.2210250240.