Experimental study of Moss-T2, Moss- Mo3Si-T2, and Mo3Si-T2 eutectic reactions in Mo-rich Mo-Si-B alloys

Seong Ho Ha; Kyosuke Yoshimi; Junya Nakamura; Takahiro Kaneko; Kouichi Maruyama; Rong Tu; Takashi Goto

doi:10.1016/j.jallcom.2014.01.089

Experimental study of Mo_ss-T₂, Mo_ss- Mo₃Si-T₂, and Mo₃Si-T₂ eutectic reactions in Mo-rich Mo-Si-B alloys

Seong Ho Ha, Kyosuke Yoshimi, Junya Nakamura, Takahiro Kaneko, Kouichi Maruyama, Rong Tu, Takashi Goto

Research output: Contribution to journal › Article

22 Citations (Scopus)

Abstract

The phase formation behavior during solidification of Mo-Si-B ternary alloys in the Mo-rich compositional portion was experimentally examined with special attention to the Mo_ss-T₂ and Mo-Mo ₃Si-T₂ eutectics. Primary phases observed in this study were in very good agreement with those shown in a liquidus projection thermodynamically calculated by Yang and Chang. A Mo-9.5Si-14.2B (at.%) alloy, which has a composition close to the Mo_ss-T₂ eutectic point, had two specific microstructural areas consisting of a superfine Mo _ss-T₂ eutectic and a fine Mo_ss-Mo ₃Si-T₂ three-phase eutectic. A Mo-19.1Si-6.5B alloy aimed to the Mo_ss-Mo₃Si-T₂ eutectic point also had a fine Mo₃Si-T₂ eutectic and a Mo_ss-Mo ₃Si-T₂ eutectic. The compositions of the eutectic phases were determined by electron probe micro-analysis calibrated using a multipoint measurement method and details of the solidification pathways in the Mo-rich compositional portion are discussed based on the experimentally obtained results compared with the liquidus projection.

Original language	English
Pages (from-to)	52-59
Number of pages	8
Journal	Journal of Alloys and Compounds
Volume	594
DOIs	https://doi.org/10.1016/j.jallcom.2014.01.089
Publication status	Published - 2014 May 5

Keywords

Intermetallics
Microstructure
Scanning electron microscopy
Transition metal alloys and compounds
Transmission electron microscopy

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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Ha, S. H., Yoshimi, K., Nakamura, J., Kaneko, T., Maruyama, K., Tu, R., & Goto, T. (2014). Experimental study of Mo_ss-T₂, Mo_ss- Mo₃Si-T₂, and Mo₃Si-T₂ eutectic reactions in Mo-rich Mo-Si-B alloys. Journal of Alloys and Compounds, 594, 52-59. https://doi.org/10.1016/j.jallcom.2014.01.089

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title = "Experimental study of Moss-T2, Moss- Mo3Si-T2, and Mo3Si-T2 eutectic reactions in Mo-rich Mo-Si-B alloys",

abstract = "The phase formation behavior during solidification of Mo-Si-B ternary alloys in the Mo-rich compositional portion was experimentally examined with special attention to the Moss-T2 and Mo-Mo 3Si-T2 eutectics. Primary phases observed in this study were in very good agreement with those shown in a liquidus projection thermodynamically calculated by Yang and Chang. A Mo-9.5Si-14.2B (at.%) alloy, which has a composition close to the Moss-T2 eutectic point, had two specific microstructural areas consisting of a superfine Mo ss-T2 eutectic and a fine Moss-Mo 3Si-T2 three-phase eutectic. A Mo-19.1Si-6.5B alloy aimed to the Moss-Mo3Si-T2 eutectic point also had a fine Mo3Si-T2 eutectic and a Moss-Mo 3Si-T2 eutectic. The compositions of the eutectic phases were determined by electron probe micro-analysis calibrated using a multipoint measurement method and details of the solidification pathways in the Mo-rich compositional portion are discussed based on the experimentally obtained results compared with the liquidus projection.",

keywords = "Intermetallics, Microstructure, Scanning electron microscopy, Transition metal alloys and compounds, Transmission electron microscopy",

author = "Ha, {Seong Ho} and Kyosuke Yoshimi and Junya Nakamura and Takahiro Kaneko and Kouichi Maruyama and Rong Tu and Takashi Goto",

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AU - Ha, Seong Ho

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AU - Nakamura, Junya

AU - Kaneko, Takahiro

AU - Maruyama, Kouichi

AU - Tu, Rong

AU - Goto, Takashi

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AB - The phase formation behavior during solidification of Mo-Si-B ternary alloys in the Mo-rich compositional portion was experimentally examined with special attention to the Moss-T2 and Mo-Mo 3Si-T2 eutectics. Primary phases observed in this study were in very good agreement with those shown in a liquidus projection thermodynamically calculated by Yang and Chang. A Mo-9.5Si-14.2B (at.%) alloy, which has a composition close to the Moss-T2 eutectic point, had two specific microstructural areas consisting of a superfine Mo ss-T2 eutectic and a fine Moss-Mo 3Si-T2 three-phase eutectic. A Mo-19.1Si-6.5B alloy aimed to the Moss-Mo3Si-T2 eutectic point also had a fine Mo3Si-T2 eutectic and a Moss-Mo 3Si-T2 eutectic. The compositions of the eutectic phases were determined by electron probe micro-analysis calibrated using a multipoint measurement method and details of the solidification pathways in the Mo-rich compositional portion are discussed based on the experimentally obtained results compared with the liquidus projection.

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KW - Scanning electron microscopy

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