Characterization of domain boundaries in Ni4Mo by convergent beam electron diffraction

Siqi Cao; C. R. Brooks; L. F. Allard

doi:10.1016/1044-5803(96)00001-0

Characterization of domain boundaries in Ni₄Mo by convergent beam electron diffraction

Siqi Cao, C. R. Brooks, L. F. Allard

Nuclear Energy Materials Microanalysis

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Abstract

The alloy Ni-20 at.% Mo (Ni₄Mo) is disordered (α) above 868°C and ordered (β) below this temperature. Upon the formation of β from the α, a variety of interfaces between the ordered domains is formed. Characterizing the domain interfaces by using conventional selected-area diffraction can be difficult since, in some orientations, superlattice diffraction spots are identical with those of the α-phase. However, convergent beam electron diffraction can be used to examine the higher-order Laue zone patterns, in which superlattice spots can be revealed, Also this technique produces the diffraction pattern from a very small analysis area. We have used this method to identify some of the characteristics of domain boundaries in the ordered Ni₄Mo alloy.

Original language	English
Pages (from-to)	73-81
Number of pages	9
Journal	Materials Characterization
Volume	36
Issue number	2
DOIs	https://doi.org/10.1016/1044-5803(96)00001-0
State	Published - Feb 1996

Funding

Part of the research was supported by the US Department of Energy, Assistant Secretary for Energy Eficiency and Renewable Energy, Ojfice

Funders	Funder number
Assistant Secretary for Energy Eficiency and Renewable Energy, Ojfice
US Department of Energy

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title = "Characterization of domain boundaries in Ni4Mo by convergent beam electron diffraction",

abstract = "The alloy Ni-20 at.% Mo (Ni4Mo) is disordered (α) above 868°C and ordered (β) below this temperature. Upon the formation of β from the α, a variety of interfaces between the ordered domains is formed. Characterizing the domain interfaces by using conventional selected-area diffraction can be difficult since, in some orientations, superlattice diffraction spots are identical with those of the α-phase. However, convergent beam electron diffraction can be used to examine the higher-order Laue zone patterns, in which superlattice spots can be revealed, Also this technique produces the diffraction pattern from a very small analysis area. We have used this method to identify some of the characteristics of domain boundaries in the ordered Ni4Mo alloy.",

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AU - Cao, Siqi

AU - Brooks, C. R.

AU - Allard, L. F.

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N2 - The alloy Ni-20 at.% Mo (Ni4Mo) is disordered (α) above 868°C and ordered (β) below this temperature. Upon the formation of β from the α, a variety of interfaces between the ordered domains is formed. Characterizing the domain interfaces by using conventional selected-area diffraction can be difficult since, in some orientations, superlattice diffraction spots are identical with those of the α-phase. However, convergent beam electron diffraction can be used to examine the higher-order Laue zone patterns, in which superlattice spots can be revealed, Also this technique produces the diffraction pattern from a very small analysis area. We have used this method to identify some of the characteristics of domain boundaries in the ordered Ni4Mo alloy.

AB - The alloy Ni-20 at.% Mo (Ni4Mo) is disordered (α) above 868°C and ordered (β) below this temperature. Upon the formation of β from the α, a variety of interfaces between the ordered domains is formed. Characterizing the domain interfaces by using conventional selected-area diffraction can be difficult since, in some orientations, superlattice diffraction spots are identical with those of the α-phase. However, convergent beam electron diffraction can be used to examine the higher-order Laue zone patterns, in which superlattice spots can be revealed, Also this technique produces the diffraction pattern from a very small analysis area. We have used this method to identify some of the characteristics of domain boundaries in the ordered Ni4Mo alloy.

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DO - 10.1016/1044-5803(96)00001-0

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JO - Materials Characterization

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Characterization of domain boundaries in Ni₄Mo by convergent beam electron diffraction

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