J. Mater. Sci. Technol. ›› 2009, Vol. 25 ›› Issue (05): 637-644.

• Articles • 上一篇    下一篇

Ti60高温钛合金电弧离子镀Ti-Al及Ti-Al-Cr涂层氧化行为Evaluation of oxidation of Ti-Al and Ti-Al-Cr coatings arc-ion plated on Ti-60 high-temperature titanium alloy

闫伟1;王清江2;刘建荣3;王启民2;孙凤久4   

  1. 1. 东北大学理学院;中国科学院金属研究所钛合金研究部;
    2. 中国科学院金属研究所
    3. 中国科学院金属研究所钛合金研究部
    4. 东北大学理学院
  • 收稿日期:2008-11-27 修回日期:2009-08-14 出版日期:2009-09-28 发布日期:2009-10-10
  • 通讯作者: 闫伟

Evaluation of Oxidation of Ti-Al and Ti-Al-Cr Coatings Arc-ion Plated on Ti-60 High-temperature Titanium Alloy

Wei Yan, Qingjiang Wang, Jianrong Liu, Shaoqiang Li, Fengjiu Sun   

  1. 1) College of Sciences, Northeastern University, Shenyang 110004, China
    2) Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2008-11-27 Revised:2009-08-14 Online:2009-09-28 Published:2009-10-10
  • Contact: YAN Wei

摘要:

摘要

关键词: 氧化;Ti-Al 涂层;Ti-Al-Cr涂层;高温钛合金

Abstract:

High-temperature titanium alloy for aeroengine compressor applications suffers from high-temperature oxidation and environmental corrosion, which prohibits long-term service of this kind alloy at temperatures above 600°C. In an attempt to tackle this problem, Ti-48Al (at. pct) and Ti-48Al-12Cr (at. pct) protective coatings were plated on the substrate of alloy Ti-60 by arc ion plating (AIP) method. Isothermal and cyclic oxidation tests were performed in static air at elevated temperatures. Phase composition, morphology of the coatings and distribution of elements were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX). The results showed that the Ti-48Al coating exhibited good isothermal oxidation resistance during exposure at 800°C, but poorer resistance against oxidation at 900°C. By contrast Ti-48Al-12Cr coating demonstrated excellent isothermal oxidation resistance at both temperatures. Cyclic oxidation tests performed at 800°C indicated that both coatings demonstrated good cyclic oxidation resistance and no spallation of coatings was observed. But at 900°C only Ti-48Al-12Cr coating demonstrated excellent cyclic oxidation resistance.

Key words: Oxidation, Ti-48Al coating, Ti-48Al-12Cr coating, High temperature
titanium alloy