Oxidation behavior of Zr-containing Ti2AlNb-based alloy at 800 °C

Wei Dang, Jin Shan Li, Tie Bang Zhang, Hong Chao Kou

科研成果: 期刊稿件文章同行评审

23 引用 (Scopus)

摘要

Abstract The oxidation behavior of Ti-22Al-(27-x)Nb-xZr (x=0, 1, 6) alloys at 800 °C for exposure time up to 100 h was examined. It is shown that oxidation rate of experimental alloys obeys the parabolic kinetics. Ti-22Al-26Nb-1Zr alloy demonstrates more excellent oxidation resistance than the other two alloys. The main oxidation products are TiO2, Al2O3 and AlNbO4 phases for all these alloys. For the Ti-22Al-26Nb-1Zr alloy, Zr addition can modify the growth mechanism of oxide scale, which can effectively hinder the diffusion of oxygen. Whereas, reaction of Zr with oxygen leads to the formation of ZrO2 precipitates for the Ti-22Al-21Nb-6Zr alloy, which promotes the oxygen ingress into the substrate. Meanwhile, oxidation affected zones, including internal-oxidation layer and oxygen-enriched zone, are present beneath the outmost oxide scale. The difference in these zones is derived from the phase constitution in the starting Ti-22Al-(27-x)Nb-xZr (x=0, 1, 6) alloys.

源语言英语
文章编号63664
页(从-至)783-790
页数8
期刊Transactions of Nonferrous Metals Society of China (English Edition)
25
3
DOI
出版状态已出版 - 1 3月 2015

指纹

探究 'Oxidation behavior of Zr-containing Ti2AlNb-based alloy at 800 °C' 的科研主题。它们共同构成独一无二的指纹。

引用此