M3B2 and M5B3 Formation in Diffusion-Affected Zone During Transient Liquid Phase Bonding Single-Crystal Superalloys

Naicheng Sheng; Xiaobing Hu; Jide Liu; Tao Jin; Xiaofeng Sun; Zhuangqi Hu

doi:10.1007/s11661-014-2733-z

M₃B₂ and M₅B₃ Formation in Diffusion-Affected Zone During Transient Liquid Phase Bonding Single-Crystal Superalloys

Naicheng Sheng^*, Xiaobing Hu, Jide Liu, Tao Jin, Xiaofeng Sun, Zhuangqi Hu

^*Corresponding author for this work

NUANCE - Atomic and Nanoscale Characterization Experimental Center

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

23 Scopus citations

Abstract

Precipitates in the diffusion-affected zone (DAZ) during transient liquid phase bonding (TLP) single-crystal superalloys were observed and investigated. Small size and dendritic-shaped precipitates were identified to be M₃B₂ borides and intergrowth of M₃B₂/M₅B₃ borides. The orientation relationships among M₃B₂, M₅B₃, and matrix were determined using transmission electron microscope (TEM). Composition characteristics of these borides were also analyzed by TEM energy-dispersive spectrometer. Because this precipitating phenomenon deviates from the traditional parabolic transient liquid phase bonding model which assumed a precipitates free DAZ during TLP bonding, some correlations between the deviation of the isothermal solidification kinetics and these newly observed precipitating behaviors were discussed and rationalized when bonding the interlayer containing the high diffusivity melting point depressant elements and substrates of low solubility.

Original language	English (US)
Pages (from-to)	1670-1677
Number of pages	8
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	46
Issue number	4
DOIs	https://doi.org/10.1007/s11661-014-2733-z
State	Published - Apr 2015

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys

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title = "M3B2 and M5B3 Formation in Diffusion-Affected Zone During Transient Liquid Phase Bonding Single-Crystal Superalloys",

abstract = "Precipitates in the diffusion-affected zone (DAZ) during transient liquid phase bonding (TLP) single-crystal superalloys were observed and investigated. Small size and dendritic-shaped precipitates were identified to be M3B2 borides and intergrowth of M3B2/M5B3 borides. The orientation relationships among M3B2, M5B3, and matrix were determined using transmission electron microscope (TEM). Composition characteristics of these borides were also analyzed by TEM energy-dispersive spectrometer. Because this precipitating phenomenon deviates from the traditional parabolic transient liquid phase bonding model which assumed a precipitates free DAZ during TLP bonding, some correlations between the deviation of the isothermal solidification kinetics and these newly observed precipitating behaviors were discussed and rationalized when bonding the interlayer containing the high diffusivity melting point depressant elements and substrates of low solubility.",

author = "Naicheng Sheng and Xiaobing Hu and Jide Liu and Tao Jin and Xiaofeng Sun and Zhuangqi Hu",

note = "Funding Information: Thanks Prof. X.L.Ma and Y.L.Zhu for the supporting of TEM analysis. This work was financially supported by the National Basic Research Program (973 Program) of China under grant No. 2010CB631200 (2010CB631206), the National Natural Science Foundation of China (NSFC) under grant No. 50971124, No. 50904059, No. 51071165 and No. 51204156. The authors are grateful for those supports. Publisher Copyright: {\textcopyright} 2014, The Minerals, Metals & Materials Society and ASM International.",

year = "2015",

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doi = "10.1007/s11661-014-2733-z",

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AU - Sheng, Naicheng

AU - Hu, Xiaobing

AU - Liu, Jide

AU - Jin, Tao

AU - Sun, Xiaofeng

AU - Hu, Zhuangqi

N1 - Funding Information: Thanks Prof. X.L.Ma and Y.L.Zhu for the supporting of TEM analysis. This work was financially supported by the National Basic Research Program (973 Program) of China under grant No. 2010CB631200 (2010CB631206), the National Natural Science Foundation of China (NSFC) under grant No. 50971124, No. 50904059, No. 51071165 and No. 51204156. The authors are grateful for those supports. Publisher Copyright: © 2014, The Minerals, Metals & Materials Society and ASM International.

PY - 2015/4

Y1 - 2015/4

N2 - Precipitates in the diffusion-affected zone (DAZ) during transient liquid phase bonding (TLP) single-crystal superalloys were observed and investigated. Small size and dendritic-shaped precipitates were identified to be M3B2 borides and intergrowth of M3B2/M5B3 borides. The orientation relationships among M3B2, M5B3, and matrix were determined using transmission electron microscope (TEM). Composition characteristics of these borides were also analyzed by TEM energy-dispersive spectrometer. Because this precipitating phenomenon deviates from the traditional parabolic transient liquid phase bonding model which assumed a precipitates free DAZ during TLP bonding, some correlations between the deviation of the isothermal solidification kinetics and these newly observed precipitating behaviors were discussed and rationalized when bonding the interlayer containing the high diffusivity melting point depressant elements and substrates of low solubility.

AB - Precipitates in the diffusion-affected zone (DAZ) during transient liquid phase bonding (TLP) single-crystal superalloys were observed and investigated. Small size and dendritic-shaped precipitates were identified to be M3B2 borides and intergrowth of M3B2/M5B3 borides. The orientation relationships among M3B2, M5B3, and matrix were determined using transmission electron microscope (TEM). Composition characteristics of these borides were also analyzed by TEM energy-dispersive spectrometer. Because this precipitating phenomenon deviates from the traditional parabolic transient liquid phase bonding model which assumed a precipitates free DAZ during TLP bonding, some correlations between the deviation of the isothermal solidification kinetics and these newly observed precipitating behaviors were discussed and rationalized when bonding the interlayer containing the high diffusivity melting point depressant elements and substrates of low solubility.

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M₃B₂ and M₅B₃ Formation in Diffusion-Affected Zone During Transient Liquid Phase Bonding Single-Crystal Superalloys

Abstract

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