Effects of Zr on the eutectoid decomposition behavior of Nb3Si into (Nb)/Nb5Si3

Seiji Miura; Miki Aoki; Yasuhiko Saeki; Kenji Ohkubo; Yoshinao Mishima; Tetsuo Mohri

doi:10.1007/s11661-005-0162-8

Effects of Zr on the eutectoid decomposition behavior of Nb₃Si into (Nb)/Nb₅Si₃

Seiji Miura, Miki Aoki, Yasuhiko Saeki, Kenji Ohkubo, Yoshinao Mishima, Tetsuo Mohri

Institute for Materials Research (IMR)

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

40 Citations (Scopus)

Abstract

The effect of Zr on the formation of Nb/Nb₅Si₃ lamellar microstructure by eutectoid decomposition reaction of Nb₃Si is investigated. It has been shown that the kinetics of the eutectoid decomposition of high-temperature Nb₃Si phase into Nb anal Nb₅Si₃ phases are sluggish in the binary Nb-Si system and that they are enhanced by Zr additions. The time-temperature-transformation (TTT) diagram for the decomposition is experimentally determined and the acceleration of the reaction by small Zr addition of 1.5 at. pct is confirmed by comparison with the reported TTT curves of binary and ternary alloys containing Ti. The role of the ternary element on the decomposition kinetics is discussed in terms of crystallographic orientation relationships (ORs) and Zr distribution in the parent Nb₃Si phase during solidification.

Original language	English
Pages (from-to)	489-496
Number of pages	8
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	36
Issue number	3
DOIs	https://doi.org/10.1007/s11661-005-0162-8
Publication status	Published - 2005 Mar

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys

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Effects of Zr on the eutectoid decomposition behavior of Nb₃Si into (Nb)/Nb₅Si₃. / Miura, Seiji; Aoki, Miki; Saeki, Yasuhiko; Ohkubo, Kenji; Mishima, Yoshinao; Mohri, Tetsuo.

In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 36, No. 3, 03.2005, p. 489-496.

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

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title = "Effects of Zr on the eutectoid decomposition behavior of Nb3Si into (Nb)/Nb5Si3",

abstract = "The effect of Zr on the formation of Nb/Nb5Si3 lamellar microstructure by eutectoid decomposition reaction of Nb3Si is investigated. It has been shown that the kinetics of the eutectoid decomposition of high-temperature Nb3Si phase into Nb anal Nb5Si3 phases are sluggish in the binary Nb-Si system and that they are enhanced by Zr additions. The time-temperature-transformation (TTT) diagram for the decomposition is experimentally determined and the acceleration of the reaction by small Zr addition of 1.5 at. pct is confirmed by comparison with the reported TTT curves of binary and ternary alloys containing Ti. The role of the ternary element on the decomposition kinetics is discussed in terms of crystallographic orientation relationships (ORs) and Zr distribution in the parent Nb3Si phase during solidification.",

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AU - Miura, Seiji

AU - Aoki, Miki

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AU - Mishima, Yoshinao

AU - Mohri, Tetsuo

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N2 - The effect of Zr on the formation of Nb/Nb5Si3 lamellar microstructure by eutectoid decomposition reaction of Nb3Si is investigated. It has been shown that the kinetics of the eutectoid decomposition of high-temperature Nb3Si phase into Nb anal Nb5Si3 phases are sluggish in the binary Nb-Si system and that they are enhanced by Zr additions. The time-temperature-transformation (TTT) diagram for the decomposition is experimentally determined and the acceleration of the reaction by small Zr addition of 1.5 at. pct is confirmed by comparison with the reported TTT curves of binary and ternary alloys containing Ti. The role of the ternary element on the decomposition kinetics is discussed in terms of crystallographic orientation relationships (ORs) and Zr distribution in the parent Nb3Si phase during solidification.

AB - The effect of Zr on the formation of Nb/Nb5Si3 lamellar microstructure by eutectoid decomposition reaction of Nb3Si is investigated. It has been shown that the kinetics of the eutectoid decomposition of high-temperature Nb3Si phase into Nb anal Nb5Si3 phases are sluggish in the binary Nb-Si system and that they are enhanced by Zr additions. The time-temperature-transformation (TTT) diagram for the decomposition is experimentally determined and the acceleration of the reaction by small Zr addition of 1.5 at. pct is confirmed by comparison with the reported TTT curves of binary and ternary alloys containing Ti. The role of the ternary element on the decomposition kinetics is discussed in terms of crystallographic orientation relationships (ORs) and Zr distribution in the parent Nb3Si phase during solidification.

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