(S)TEM study of different stages of Ti-45Al-8Nb-0.2W-0.2B-0.02Y alloy oxidation at 900 °C

W. Lu; C. L. Chen; L. L. He; F. H. Wang; J. P. Lin; G. L. Chen

doi:10.1016/j.corsci.2007.11.013

(S)TEM study of different stages of Ti-45Al-8Nb-0.2W-0.2B-0.02Y alloy oxidation at 900 °C

W. Lu, C. L. Chen, L. L. He, F. H. Wang, J. P. Lin, G. L. Chen

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

31 Citations (Scopus)

Abstract

The oxidation process of Ti-45Al-8Nb-0.2W-0.2B-0.02Y (at%) can be divided into three stages during 100 h at 900 °C. The change of ion diffusion path leads to the discontinuity of the oxidation curve between the second and third stage. Different stages of oxidation morphology have been investigated combined with TEM and STEM. AlNb₂ phase forms at the interface of oxide scale/base alloy. Contrary to a continuous formation of 'x' phase in γ-TiAl with Nb free at the interface of oxide scale/base alloy. AlNb₂ phase hinder continuous 'x' phase formation, which can promote TiAl oxidation protection.

Original language	English
Pages (from-to)	978-988
Number of pages	11
Journal	Corrosion Science
Volume	50
Issue number	4
DOIs	https://doi.org/10.1016/j.corsci.2007.11.013
Publication status	Published - 2008 Apr 1

Keywords

A. Alloy
B. STEM
C. Oxidation

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Science(all)

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10.1016/j.corsci.2007.11.013

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title = "(S)TEM study of different stages of Ti-45Al-8Nb-0.2W-0.2B-0.02Y alloy oxidation at 900 °C",

abstract = "The oxidation process of Ti-45Al-8Nb-0.2W-0.2B-0.02Y (at%) can be divided into three stages during 100 h at 900 °C. The change of ion diffusion path leads to the discontinuity of the oxidation curve between the second and third stage. Different stages of oxidation morphology have been investigated combined with TEM and STEM. AlNb2 phase forms at the interface of oxide scale/base alloy. Contrary to a continuous formation of 'x' phase in γ-TiAl with Nb free at the interface of oxide scale/base alloy. AlNb2 phase hinder continuous 'x' phase formation, which can promote TiAl oxidation protection.",

keywords = "A. Alloy, B. STEM, C. Oxidation",

author = "W. Lu and Chen, {C. L.} and He, {L. L.} and Wang, {F. H.} and Lin, {J. P.} and Chen, {G. L.}",

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T1 - (S)TEM study of different stages of Ti-45Al-8Nb-0.2W-0.2B-0.02Y alloy oxidation at 900 °C

AU - Lu, W.

AU - Chen, C. L.

AU - He, L. L.

AU - Wang, F. H.

AU - Lin, J. P.

AU - Chen, G. L.

PY - 2008/4/1

Y1 - 2008/4/1

N2 - The oxidation process of Ti-45Al-8Nb-0.2W-0.2B-0.02Y (at%) can be divided into three stages during 100 h at 900 °C. The change of ion diffusion path leads to the discontinuity of the oxidation curve between the second and third stage. Different stages of oxidation morphology have been investigated combined with TEM and STEM. AlNb2 phase forms at the interface of oxide scale/base alloy. Contrary to a continuous formation of 'x' phase in γ-TiAl with Nb free at the interface of oxide scale/base alloy. AlNb2 phase hinder continuous 'x' phase formation, which can promote TiAl oxidation protection.

AB - The oxidation process of Ti-45Al-8Nb-0.2W-0.2B-0.02Y (at%) can be divided into three stages during 100 h at 900 °C. The change of ion diffusion path leads to the discontinuity of the oxidation curve between the second and third stage. Different stages of oxidation morphology have been investigated combined with TEM and STEM. AlNb2 phase forms at the interface of oxide scale/base alloy. Contrary to a continuous formation of 'x' phase in γ-TiAl with Nb free at the interface of oxide scale/base alloy. AlNb2 phase hinder continuous 'x' phase formation, which can promote TiAl oxidation protection.

KW - A. Alloy

KW - B. STEM

KW - C. Oxidation

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