Phase transformation in the nitride layer during the oxidation of TiAl-based alloys

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

doi:10.1016/j.scriptamat.2007.01.013

Phase transformation in the nitride layer during the oxidation of TiAl-based alloys

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

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

13 Citations (Scopus)

Abstract

The orientation relationship (OR) between the TiN and Ti₂AlN phases in the nitride layer during the oxidation of TiAl-based alloy at 900 °C was determined by transmission electron microscopy (TEM). The OR is (1 1 1)_TiN ∥ (0 0 0 1)_Ti2AlN, [0 over(1, ̄) 1]_TiN ∥ [1 1 over(2, ̄) 0]_{Ti2 AlN}. Al can reduce the twin boundary energy of TiN, leading to the formation of many stacking faults in the Al-enriched TiN phase. The Ti₂AlN phase forms at the bottom of the TiN phase when the Al content is sufficient to induce phase transformation. Phase transformation was identified in the Ti₂AlN phase after electron irradiation for about 40 s.

Original language	English
Pages (from-to)	773-776
Number of pages	4
Journal	Scripta Materialia
Volume	56
Issue number	9
DOIs	https://doi.org/10.1016/j.scriptamat.2007.01.013
Publication status	Published - 2007 May

Keywords

Orientation relationship
Oxidation
TiAl
Transmission electron microscopy

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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@article{e09b5508785f41058e986149af80af29,

title = "Phase transformation in the nitride layer during the oxidation of TiAl-based alloys",

abstract = "The orientation relationship (OR) between the TiN and Ti2AlN phases in the nitride layer during the oxidation of TiAl-based alloy at 900 °C was determined by transmission electron microscopy (TEM). The OR is (1 1 1)TiN ∥ (0 0 0 1)Ti2AlN, [0 over(1,{\= }) 1]TiN ∥ [1 1 over(2,{\= }) 0]Ti2 AlN. Al can reduce the twin boundary energy of TiN, leading to the formation of many stacking faults in the Al-enriched TiN phase. The Ti2AlN phase forms at the bottom of the TiN phase when the Al content is sufficient to induce phase transformation. Phase transformation was identified in the Ti2AlN phase after electron irradiation for about 40 s.",

keywords = "Orientation relationship, Oxidation, TiAl, Transmission electron microscopy",

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

year = "2007",

month = may,

doi = "10.1016/j.scriptamat.2007.01.013",

language = "English",

volume = "56",

pages = "773--776",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Elsevier Limited",

number = "9",

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TY - JOUR

T1 - Phase transformation in the nitride layer during the oxidation of TiAl-based alloys

AU - Lu, W.

AU - Chen, C. L.

AU - Wang, F. H.

AU - Lin, J. P.

AU - Chen, G. L.

AU - He, L. L.

PY - 2007/5

Y1 - 2007/5

N2 - The orientation relationship (OR) between the TiN and Ti2AlN phases in the nitride layer during the oxidation of TiAl-based alloy at 900 °C was determined by transmission electron microscopy (TEM). The OR is (1 1 1)TiN ∥ (0 0 0 1)Ti2AlN, [0 over(1, ̄) 1]TiN ∥ [1 1 over(2, ̄) 0]Ti2 AlN. Al can reduce the twin boundary energy of TiN, leading to the formation of many stacking faults in the Al-enriched TiN phase. The Ti2AlN phase forms at the bottom of the TiN phase when the Al content is sufficient to induce phase transformation. Phase transformation was identified in the Ti2AlN phase after electron irradiation for about 40 s.

AB - The orientation relationship (OR) between the TiN and Ti2AlN phases in the nitride layer during the oxidation of TiAl-based alloy at 900 °C was determined by transmission electron microscopy (TEM). The OR is (1 1 1)TiN ∥ (0 0 0 1)Ti2AlN, [0 over(1, ̄) 1]TiN ∥ [1 1 over(2, ̄) 0]Ti2 AlN. Al can reduce the twin boundary energy of TiN, leading to the formation of many stacking faults in the Al-enriched TiN phase. The Ti2AlN phase forms at the bottom of the TiN phase when the Al content is sufficient to induce phase transformation. Phase transformation was identified in the Ti2AlN phase after electron irradiation for about 40 s.

KW - Orientation relationship

KW - Oxidation

KW - TiAl

KW - Transmission electron microscopy

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VL - 56

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JO - Scripta Materialia

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SN - 1359-6462

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