Domain structures associated with the twinned phases V8N and V4N

G. Nouet; J. Vicens; P. Delavignette

doi:10.1002/pssa.2210620212

Domain structures associated with the twinned phases V₈N and V₄N

G. Nouet, J. Vicens, P. Delavignette

Research output › peer-review

Abstract

The system V–N is investigated by X‐rays, electron diffraction, and electron microscopy in the composition range 0 up to 25 at% N. The solid solubility of nitrogen is determined in the temperature range 500 up to 1200 °C. Two phases are formed upon quenching. The first is the V₈N tetragonal phase. A supercell of the vanadium cell is proposed (a = b = 2a_o √2, c = c_o). The transformation b.c.c. → b.c.t. gives rise to a particular twinned configuration. The domains are related by a reflection twin (101)_t, taking into account a supplementary rotation due to the tetragonal deformation. A new pseudo‐orthorhombic phase V₄N is analysed. This phase is isomorphous to Ta₄N. The domain structure is described using a reflection twin (110)_o and a rotation twin (130)_o.

Original language	English
Pages (from-to)	449-457
Number of pages	9
Journal	physica status solidi (a)
Volume	62
Issue number	2
DOIs	https://doi.org/10.1002/pssa.2210620212
State	Published - 16 Dec 1980
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1002/pssa.2210620212

Cite this

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title = "Domain structures associated with the twinned phases V8N and V4N",

abstract = "The system V–N is investigated by X‐rays, electron diffraction, and electron microscopy in the composition range 0 up to 25 at\% N. The solid solubility of nitrogen is determined in the temperature range 500 up to 1200 °C. Two phases are formed upon quenching. The first is the V8N tetragonal phase. A supercell of the vanadium cell is proposed (a = b = 2ao √2, c = co). The transformation b.c.c. → b.c.t. gives rise to a particular twinned configuration. The domains are related by a reflection twin (101)t, taking into account a supplementary rotation due to the tetragonal deformation. A new pseudo‐orthorhombic phase V4N is analysed. This phase is isomorphous to Ta4N. The domain structure is described using a reflection twin (110)o and a rotation twin (130)o.",

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T1 - Domain structures associated with the twinned phases V8N and V4N

AU - Nouet, G.

AU - Vicens, J.

AU - Delavignette, P.

PY - 1980/12/16

Y1 - 1980/12/16

N2 - The system V–N is investigated by X‐rays, electron diffraction, and electron microscopy in the composition range 0 up to 25 at% N. The solid solubility of nitrogen is determined in the temperature range 500 up to 1200 °C. Two phases are formed upon quenching. The first is the V8N tetragonal phase. A supercell of the vanadium cell is proposed (a = b = 2ao √2, c = co). The transformation b.c.c. → b.c.t. gives rise to a particular twinned configuration. The domains are related by a reflection twin (101)t, taking into account a supplementary rotation due to the tetragonal deformation. A new pseudo‐orthorhombic phase V4N is analysed. This phase is isomorphous to Ta4N. The domain structure is described using a reflection twin (110)o and a rotation twin (130)o.

AB - The system V–N is investigated by X‐rays, electron diffraction, and electron microscopy in the composition range 0 up to 25 at% N. The solid solubility of nitrogen is determined in the temperature range 500 up to 1200 °C. Two phases are formed upon quenching. The first is the V8N tetragonal phase. A supercell of the vanadium cell is proposed (a = b = 2ao √2, c = co). The transformation b.c.c. → b.c.t. gives rise to a particular twinned configuration. The domains are related by a reflection twin (101)t, taking into account a supplementary rotation due to the tetragonal deformation. A new pseudo‐orthorhombic phase V4N is analysed. This phase is isomorphous to Ta4N. The domain structure is described using a reflection twin (110)o and a rotation twin (130)o.

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