Formation of Ni5Al3 phase in Ni3Al/NiAl diffusion couples

Y. Ootoshi; K. Fujiwara; Z. Horita; M. Nemoto

doi:10.2320/matertrans1989.39.225

Formation of Ni₅Al₃ phase in Ni₃Al/NiAl diffusion couples

Y. Ootoshi, K. Fujiwara, Z. Horita, M. Nemoto

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

14 Citations (Scopus)

Abstract

Diffusion experiments have been conducted using the Ni₃Al/NiAl couples at annealing temperatures of 873 and 923 K. It is shown that the Ni₅Al₃ phase forms between the Ni₃Al and NiAl phases during the diffusion annealing. Optical microscopy, transmission electron microscopy and electron probe microanalysis (EPMA) are employed for the identification of the Ni₅Al₃ phase. Concentration profiles of Al across the diffusion-couple interfaces are measured using EPMA to determine the region of the Ni₅Al₃ single-phase in the Ni-Al binary phase diagram. Interdiffusion coefficients in the Ni₅Al₃ phase are also determined from the concentration profiles.

Original language	English
Pages (from-to)	225-229
Number of pages	5
Journal	Materials Transactions, JIM
Volume	39
Issue number	1
DOIs	https://doi.org/10.2320/matertrans1989.39.225
Publication status	Published - Jan 1998

All Science Journal Classification (ASJC) codes

Engineering(all)

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abstract = "Diffusion experiments have been conducted using the Ni3Al/NiAl couples at annealing temperatures of 873 and 923 K. It is shown that the Ni5Al3 phase forms between the Ni3Al and NiAl phases during the diffusion annealing. Optical microscopy, transmission electron microscopy and electron probe microanalysis (EPMA) are employed for the identification of the Ni5Al3 phase. Concentration profiles of Al across the diffusion-couple interfaces are measured using EPMA to determine the region of the Ni5Al3 single-phase in the Ni-Al binary phase diagram. Interdiffusion coefficients in the Ni5Al3 phase are also determined from the concentration profiles.",

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AB - Diffusion experiments have been conducted using the Ni3Al/NiAl couples at annealing temperatures of 873 and 923 K. It is shown that the Ni5Al3 phase forms between the Ni3Al and NiAl phases during the diffusion annealing. Optical microscopy, transmission electron microscopy and electron probe microanalysis (EPMA) are employed for the identification of the Ni5Al3 phase. Concentration profiles of Al across the diffusion-couple interfaces are measured using EPMA to determine the region of the Ni5Al3 single-phase in the Ni-Al binary phase diagram. Interdiffusion coefficients in the Ni5Al3 phase are also determined from the concentration profiles.

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Formation of Ni₅Al₃ phase in Ni₃Al/NiAl diffusion couples

Abstract

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