Mechanism of Cr effect for improvement of oxidation resistance of Ti-Al-Cr alloys

C. G. Zhou; Y. Vang; S. K. Gong; H. B. Xu

Mechanism of Cr effect for improvement of oxidation resistance of Ti-Al-Cr alloys

C. G. Zhou^*
, Y. Vang
, S. K. Gong
, H. B. Xu

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University

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

8 Scopus citations

Abstract

The high temperature oxidized behavior of Ti-50Al, Ti-50Al-15Cr, Ti-45Al-15Cr and Ti-67Al-8Cr (at.%)alloy at 900-1000°C was studied. The results show that Ti-50Al-15Cr, Ti-45Al-15Cr and Ti-67Al-8Cr have good oxidation resistance. The weight gain at 950°C for Ti-50Al-15Cr and Ti-67Al-8Cr is more than that at 1000°C, which is due to a decrease in titanium activity in Ti-Al-Cr alloys when Cr is added into Ti-Al alloys. Oxides formed on the surface of Ti-50Al-15Cr, Ti-45Al-15Cr and Ti-67Al-8Cr after oxidation consist of α-Al₂O₃ and tiny TiO₂. The formation of Al₂O₃ is attributed to the role of Cr. Effect of Cr can be described by gettering effect.

Original language	English
Pages (from-to)	73-77
Number of pages	5
Journal	Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica
Volume	22
Issue number	1
State	Published - Jan 2001

Keywords

Effect of Cr
Ti-Al-Cr High temperature oxidation
TiAl

Cite this

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title = "Mechanism of Cr effect for improvement of oxidation resistance of Ti-Al-Cr alloys",

abstract = "The high temperature oxidized behavior of Ti-50Al, Ti-50Al-15Cr, Ti-45Al-15Cr and Ti-67Al-8Cr (at.\%)alloy at 900-1000°C was studied. The results show that Ti-50Al-15Cr, Ti-45Al-15Cr and Ti-67Al-8Cr have good oxidation resistance. The weight gain at 950°C for Ti-50Al-15Cr and Ti-67Al-8Cr is more than that at 1000°C, which is due to a decrease in titanium activity in Ti-Al-Cr alloys when Cr is added into Ti-Al alloys. Oxides formed on the surface of Ti-50Al-15Cr, Ti-45Al-15Cr and Ti-67Al-8Cr after oxidation consist of α-Al2O3 and tiny TiO2. The formation of Al2O3 is attributed to the role of Cr. Effect of Cr can be described by gettering effect.",

keywords = "Effect of Cr, Ti-Al-Cr High temperature oxidation, TiAl",

author = "Zhou, \{C. G.\} and Y. Vang and Gong, \{S. K.\} and Xu, \{H. B.\}",

year = "2001",

month = jan,

language = "英语",

volume = "22",

pages = "73--77",

journal = "Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica",

issn = "1000-6893",

publisher = "Chinese Society of Astronautics",

number = "1",

}

TY - JOUR

T1 - Mechanism of Cr effect for improvement of oxidation resistance of Ti-Al-Cr alloys

AU - Zhou, C. G.

AU - Vang, Y.

AU - Gong, S. K.

AU - Xu, H. B.

PY - 2001/1

Y1 - 2001/1

N2 - The high temperature oxidized behavior of Ti-50Al, Ti-50Al-15Cr, Ti-45Al-15Cr and Ti-67Al-8Cr (at.%)alloy at 900-1000°C was studied. The results show that Ti-50Al-15Cr, Ti-45Al-15Cr and Ti-67Al-8Cr have good oxidation resistance. The weight gain at 950°C for Ti-50Al-15Cr and Ti-67Al-8Cr is more than that at 1000°C, which is due to a decrease in titanium activity in Ti-Al-Cr alloys when Cr is added into Ti-Al alloys. Oxides formed on the surface of Ti-50Al-15Cr, Ti-45Al-15Cr and Ti-67Al-8Cr after oxidation consist of α-Al2O3 and tiny TiO2. The formation of Al2O3 is attributed to the role of Cr. Effect of Cr can be described by gettering effect.

AB - The high temperature oxidized behavior of Ti-50Al, Ti-50Al-15Cr, Ti-45Al-15Cr and Ti-67Al-8Cr (at.%)alloy at 900-1000°C was studied. The results show that Ti-50Al-15Cr, Ti-45Al-15Cr and Ti-67Al-8Cr have good oxidation resistance. The weight gain at 950°C for Ti-50Al-15Cr and Ti-67Al-8Cr is more than that at 1000°C, which is due to a decrease in titanium activity in Ti-Al-Cr alloys when Cr is added into Ti-Al alloys. Oxides formed on the surface of Ti-50Al-15Cr, Ti-45Al-15Cr and Ti-67Al-8Cr after oxidation consist of α-Al2O3 and tiny TiO2. The formation of Al2O3 is attributed to the role of Cr. Effect of Cr can be described by gettering effect.

KW - Effect of Cr

KW - Ti-Al-Cr High temperature oxidation

KW - TiAl

UR - https://www.scopus.com/pages/publications/0034861665

M3 - 文章

AN - SCOPUS:0034861665

SN - 1000-6893

VL - 22

SP - 73

EP - 77

JO - Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica

JF - Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica

IS - 1

ER -

Mechanism of Cr effect for improvement of oxidation resistance of Ti-Al-Cr alloys

Abstract

Keywords

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