Elevated temperature oxidation behavior of the new γ-TiAl alloy

Yuanyuan Luo; Zhengping Xi; Yafeng Lu; Xiaonan Mao; Yi Yang; Weidong Zeng

Elevated temperature oxidation behavior of the new γ-TiAl alloy

Yuanyuan Luo, Zhengping Xi, Yafeng Lu, Xiaonan Mao, Yi Yang, Weidong Zeng

School of Materials Sience and Engineering

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

Abstract

The oxidation behavior of TiA-3Ta-X(Cr, W) alloy was investigated by thermogravimetric method. Isothermal experiments were carried out from 800°C to 900°C in air. The alloy microstructure and the composition as well as the composition distribution of the oxide scale were analysed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The results show that the oxidation kinetics obey linearity-parabolic law and the total activation energy is 203 kJ/mol at temperature range of 800~900°C for 0~200 h. The scale thickness increases with the increase of time and temperature. A mixture oxide of protective Al₂O₃, AlTaO₄ and TiO₂ is formed for long time which becomes an important factor increasing the thermal stability of TiAl-3Ta-X (Cr, W).

Original language	English
Pages (from-to)	219-223
Number of pages	5
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	43
Issue number	1
State	Published - Jan 2014

Keywords

Oxidation
Oxide layer
TiAl alloy

Cite this

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title = "Elevated temperature oxidation behavior of the new γ-TiAl alloy",

abstract = "The oxidation behavior of TiA-3Ta-X(Cr, W) alloy was investigated by thermogravimetric method. Isothermal experiments were carried out from 800°C to 900°C in air. The alloy microstructure and the composition as well as the composition distribution of the oxide scale were analysed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The results show that the oxidation kinetics obey linearity-parabolic law and the total activation energy is 203 kJ/mol at temperature range of 800~900°C for 0~200 h. The scale thickness increases with the increase of time and temperature. A mixture oxide of protective Al2O3, AlTaO4 and TiO2 is formed for long time which becomes an important factor increasing the thermal stability of TiAl-3Ta-X (Cr, W).",

keywords = "Oxidation, Oxide layer, TiAl alloy",

author = "Yuanyuan Luo and Zhengping Xi and Yafeng Lu and Xiaonan Mao and Yi Yang and Weidong Zeng",

year = "2014",

month = jan,

language = "英语",

volume = "43",

pages = "219--223",

journal = "Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering",

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TY - JOUR

T1 - Elevated temperature oxidation behavior of the new γ-TiAl alloy

AU - Luo, Yuanyuan

AU - Xi, Zhengping

AU - Lu, Yafeng

AU - Mao, Xiaonan

AU - Yang, Yi

AU - Zeng, Weidong

PY - 2014/1

Y1 - 2014/1

N2 - The oxidation behavior of TiA-3Ta-X(Cr, W) alloy was investigated by thermogravimetric method. Isothermal experiments were carried out from 800°C to 900°C in air. The alloy microstructure and the composition as well as the composition distribution of the oxide scale were analysed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The results show that the oxidation kinetics obey linearity-parabolic law and the total activation energy is 203 kJ/mol at temperature range of 800~900°C for 0~200 h. The scale thickness increases with the increase of time and temperature. A mixture oxide of protective Al2O3, AlTaO4 and TiO2 is formed for long time which becomes an important factor increasing the thermal stability of TiAl-3Ta-X (Cr, W).

AB - The oxidation behavior of TiA-3Ta-X(Cr, W) alloy was investigated by thermogravimetric method. Isothermal experiments were carried out from 800°C to 900°C in air. The alloy microstructure and the composition as well as the composition distribution of the oxide scale were analysed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The results show that the oxidation kinetics obey linearity-parabolic law and the total activation energy is 203 kJ/mol at temperature range of 800~900°C for 0~200 h. The scale thickness increases with the increase of time and temperature. A mixture oxide of protective Al2O3, AlTaO4 and TiO2 is formed for long time which becomes an important factor increasing the thermal stability of TiAl-3Ta-X (Cr, W).

KW - Oxidation

KW - Oxide layer

KW - TiAl alloy

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M3 - 文章

AN - SCOPUS:84894759493

SN - 1002-185X

VL - 43

SP - 219

EP - 223

JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

IS - 1

ER -

Elevated temperature oxidation behavior of the new γ-TiAl alloy

Abstract

Keywords

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