Pseudo-interface formation and diffusion behaviour in the B2 phase region of NiAl-base diffusion couples

R. Kainuma; H. Ikenoya; I. Ohnuma; K. Ishida

doi:10.4028/www.scientific.net/ddf.143-147.425

Pseudo-interface formation and diffusion behaviour in the B2 phase region of NiAl-base diffusion couples

R. Kainuma, H. Ikenoya, I. Ohnuma, K. Ishida

ENG - Metallurgy

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

6 Citations (Scopus)

Abstract

The microstructure and concentration profiles in the B2 phase region of the diffusion couples of Ni-Al-X (X: Ti, V, Cr, Mn, Fe, Co and Cu) ternary systems were examined by EPMA. A pseudo-interface between β₁, (low Al) / β₂ (high Al) characterized by a sharp change in the concentration profiles of both Al and the alloying element is observed in composition range near 50at%Al. The characteristic features of the concentration profiles in the Ni-Al base ternary diffusion couples are presented and the up-hill diffusion of alloying elements observed at the pseudo-interface of the Ni-Al-X (X: Ti, V, Cr, Mn, Fe, Co and Cu) ternary systems is discussed from a thermodynamic point of view.

Original language	English
Pages (from-to)	425-430
Number of pages	6
Journal	Defect and Diffusion Forum
Volume	143-147
DOIs	https://doi.org/10.4028/www.scientific.net/ddf.143-147.425
Publication status	Published - 1997

Keywords

Diffusion Couple
NiAl Base Systems
Pseudo-Interface
Thermodynamic Factor
Up-Hill Diffusion

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10.4028/www.scientific.net/ddf.143-147.425

Cite this

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title = "Pseudo-interface formation and diffusion behaviour in the B2 phase region of NiAl-base diffusion couples",

abstract = "The microstructure and concentration profiles in the B2 phase region of the diffusion couples of Ni-Al-X (X: Ti, V, Cr, Mn, Fe, Co and Cu) ternary systems were examined by EPMA. A pseudo-interface between β1, (low Al) / β2 (high Al) characterized by a sharp change in the concentration profiles of both Al and the alloying element is observed in composition range near 50at%Al. The characteristic features of the concentration profiles in the Ni-Al base ternary diffusion couples are presented and the up-hill diffusion of alloying elements observed at the pseudo-interface of the Ni-Al-X (X: Ti, V, Cr, Mn, Fe, Co and Cu) ternary systems is discussed from a thermodynamic point of view.",

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T1 - Pseudo-interface formation and diffusion behaviour in the B2 phase region of NiAl-base diffusion couples

AU - Kainuma, R.

AU - Ikenoya, H.

AU - Ohnuma, I.

AU - Ishida, K.

PY - 1997

Y1 - 1997

N2 - The microstructure and concentration profiles in the B2 phase region of the diffusion couples of Ni-Al-X (X: Ti, V, Cr, Mn, Fe, Co and Cu) ternary systems were examined by EPMA. A pseudo-interface between β1, (low Al) / β2 (high Al) characterized by a sharp change in the concentration profiles of both Al and the alloying element is observed in composition range near 50at%Al. The characteristic features of the concentration profiles in the Ni-Al base ternary diffusion couples are presented and the up-hill diffusion of alloying elements observed at the pseudo-interface of the Ni-Al-X (X: Ti, V, Cr, Mn, Fe, Co and Cu) ternary systems is discussed from a thermodynamic point of view.

AB - The microstructure and concentration profiles in the B2 phase region of the diffusion couples of Ni-Al-X (X: Ti, V, Cr, Mn, Fe, Co and Cu) ternary systems were examined by EPMA. A pseudo-interface between β1, (low Al) / β2 (high Al) characterized by a sharp change in the concentration profiles of both Al and the alloying element is observed in composition range near 50at%Al. The characteristic features of the concentration profiles in the Ni-Al base ternary diffusion couples are presented and the up-hill diffusion of alloying elements observed at the pseudo-interface of the Ni-Al-X (X: Ti, V, Cr, Mn, Fe, Co and Cu) ternary systems is discussed from a thermodynamic point of view.

KW - Diffusion Couple

KW - NiAl Base Systems

KW - Pseudo-Interface

KW - Thermodynamic Factor

KW - Up-Hill Diffusion

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EP - 430

JO - Defect and Diffusion Forum

JF - Defect and Diffusion Forum

ER -

Pseudo-interface formation and diffusion behaviour in the B2 phase region of NiAl-base diffusion couples

Abstract

Keywords

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