Effect of different alloyed layers on the high temperature oxidation behavior of newly developed Ti2AlNb-based alloys

被引：40
|
作者：
Wu, Hongyan [1 ]
Zhang, Pingze [2 ]
Zhao, Haofeng [1 ]
Wang, Ling [1 ]
Xie, Aigen [1 ]
机构：
[1] Nanjing Univ Informat Sci & Technol, Coll Math & Phys, Nanjing 210044, Peoples R China
[2] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 210016, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2011年 / 257卷 / 06期
关键词：
Oxidation resistance; Orthorhombic alloys; Plasma surface alloying; RESISTANCE; COATINGS; AL; INTERMETALLICS;
D O I：
10.1016/j.apsusc.2010.08.101
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The application of titanium aluminide orthorhombic alloys (O-phase alloys) as potential materials in aircraft and jet engines was limited by their poor oxidation resistance at high temperature. The Ti2AlNb-based alloys were chromised (Cr), chromium-tungstened (Cr-W) and nickel-chromised (Ni-Cr) by the double glow plasma surface alloying process to improve their high temperature oxidation resistance. The discontinuous oxidative behavior of Cr, Cr-W and Ni-Cr alloyed layers on Ti2AlNb-based alloy at 1093K was explored in this study. After exposing at 1093 K, the TiO2 layer was formed on the bare alloy and accompanied by the occurrence of crack, which promoted oxidation rate. The oxidation behavior of Ti2AlNb-based alloys was improved by surface alloying due to the formation of protective Al2O3 scale or continuous and dense NiCr2O4 film. The Ni-Cr alloyed layer presented the best high-temperature oxidation resistance among three alloyed layers. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：1835 / 1839
页数：5
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