Short range order in Ni4Mo and its high resolution electron microscope images

S. Hata; S. Matsumura; N. Kuwano; K. Oki; D. Shindo

doi:10.1016/S1359-6454(98)00180-3

Short range order in Ni₄Mo and its high resolution electron microscope images

S. Hata, S. Matsumura, N. Kuwano, K. Oki, D. Shindo

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

The short range ordered (SRO) structure in Ni₄Mo has been investigated by means of high resolution transmission electron microscopy with digital image processing and Monte Carlo simulation. High resolution transmission electron microscope (HRTEM) images were recorded with an Imaging Plate (IP) system. Conventionally printed images of the SRO state exhibit locally dot patterns corresponding to N₂M₂-type (chalcopyrite-like) structure. However, the dot patterns transform into those of subunit cell clusters of D1_a, D0₂₂ and Pt₂Mo structures, when the image is output with a different gray scale. The Monte Carlo simulation with appropriate interaction parameters of atoms has explained successfully the HRTEM images. It is concluded that the SRO state in Ni₄Mo involves subunit cell clusters of D1_a, D0₂₂ and Pt₂Mo structures in the atomistic level of microstructure. The concept of 〈11/20〉* static concentration waves corresponding to the N₂M₂ pattern is rationalized as a mesoscopically averaging view of the SRO state.

Original language	English
Pages (from-to)	4955-4961
Number of pages	7
Journal	Acta Materialia
Volume	46
Issue number	14
DOIs	https://doi.org/10.1016/S1359-6454(98)00180-3
Publication status	Published - 1998 Sept 1
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

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10.1016/S1359-6454(98)00180-3

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title = "Short range order in Ni4Mo and its high resolution electron microscope images",

abstract = "The short range ordered (SRO) structure in Ni4Mo has been investigated by means of high resolution transmission electron microscopy with digital image processing and Monte Carlo simulation. High resolution transmission electron microscope (HRTEM) images were recorded with an Imaging Plate (IP) system. Conventionally printed images of the SRO state exhibit locally dot patterns corresponding to N2M2-type (chalcopyrite-like) structure. However, the dot patterns transform into those of subunit cell clusters of D1a, D022 and Pt2Mo structures, when the image is output with a different gray scale. The Monte Carlo simulation with appropriate interaction parameters of atoms has explained successfully the HRTEM images. It is concluded that the SRO state in Ni4Mo involves subunit cell clusters of D1a, D022 and Pt2Mo structures in the atomistic level of microstructure. The concept of 〈11/20〉* static concentration waves corresponding to the N2M2 pattern is rationalized as a mesoscopically averaging view of the SRO state.",

author = "S. Hata and S. Matsumura and N. Kuwano and K. Oki and D. Shindo",

note = "Funding Information: The authors would like to thank T. Manabe of the HVEM Laboratory, Kyushu University for his kind help in operation of JEM-2010FEF. This study was partly supported by Grants-in-Aid for Scientific Research (B) (2) (#08455293) as well as for Scientific Research (1) (#09242102, #09242106) on the Priority Area “Investigation of Microscopic Mechanisms of Phase Transformations for the Structure Control of Materials” from the Ministry of Education, Science, Sports and Culture, Japan.",

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T1 - Short range order in Ni4Mo and its high resolution electron microscope images

AU - Hata, S.

AU - Matsumura, S.

AU - Kuwano, N.

AU - Oki, K.

AU - Shindo, D.

N1 - Funding Information: The authors would like to thank T. Manabe of the HVEM Laboratory, Kyushu University for his kind help in operation of JEM-2010FEF. This study was partly supported by Grants-in-Aid for Scientific Research (B) (2) (#08455293) as well as for Scientific Research (1) (#09242102, #09242106) on the Priority Area “Investigation of Microscopic Mechanisms of Phase Transformations for the Structure Control of Materials” from the Ministry of Education, Science, Sports and Culture, Japan.

PY - 1998/9/1

Y1 - 1998/9/1

N2 - The short range ordered (SRO) structure in Ni4Mo has been investigated by means of high resolution transmission electron microscopy with digital image processing and Monte Carlo simulation. High resolution transmission electron microscope (HRTEM) images were recorded with an Imaging Plate (IP) system. Conventionally printed images of the SRO state exhibit locally dot patterns corresponding to N2M2-type (chalcopyrite-like) structure. However, the dot patterns transform into those of subunit cell clusters of D1a, D022 and Pt2Mo structures, when the image is output with a different gray scale. The Monte Carlo simulation with appropriate interaction parameters of atoms has explained successfully the HRTEM images. It is concluded that the SRO state in Ni4Mo involves subunit cell clusters of D1a, D022 and Pt2Mo structures in the atomistic level of microstructure. The concept of 〈11/20〉* static concentration waves corresponding to the N2M2 pattern is rationalized as a mesoscopically averaging view of the SRO state.

AB - The short range ordered (SRO) structure in Ni4Mo has been investigated by means of high resolution transmission electron microscopy with digital image processing and Monte Carlo simulation. High resolution transmission electron microscope (HRTEM) images were recorded with an Imaging Plate (IP) system. Conventionally printed images of the SRO state exhibit locally dot patterns corresponding to N2M2-type (chalcopyrite-like) structure. However, the dot patterns transform into those of subunit cell clusters of D1a, D022 and Pt2Mo structures, when the image is output with a different gray scale. The Monte Carlo simulation with appropriate interaction parameters of atoms has explained successfully the HRTEM images. It is concluded that the SRO state in Ni4Mo involves subunit cell clusters of D1a, D022 and Pt2Mo structures in the atomistic level of microstructure. The concept of 〈11/20〉* static concentration waves corresponding to the N2M2 pattern is rationalized as a mesoscopically averaging view of the SRO state.

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Short range order in Ni₄Mo and its high resolution electron microscope images

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