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Effect of Niobium Addition on the Oxidation Behavior of a Ti_3Al Alloy

机译:铌添加对Ti_3Al合金氧化行为的影响

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摘要

The effect of niobium on the oxidation behavior of a Ti_3Al alloy was studied in pure oxygen in the temperature range of 1123-1373 K. The experiments were carried out using Thermogravimetric Analysis (TGA) apparatus. The oxidation curves for the alloy followed parabolic law. Effective activation energy of 284 kJ/mol was deduced for the oxidation of Ti_3Al-Nb alloy. The oxidation products were analyzed using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray analysis (EDX) techniques. The oxidation products were mainly the mixture of TiO_2 (rutile), TiO, and Al_2O_3 (alumina) with small amount of niobium oxide. Oxidation resistance of Ti_3Al was found to have been improved by the addition of niobium. Layered structure comprising of a mixture of rutile and alumina was observed on the oxide scale of the Ti_3Al-Nb alloy at temperatures higher than 1273 K.
机译:在1123-1373 K温度范围内,研究了铌对纯氧中Ti_3Al合金氧化行为的影响。使用热重分析(TGA)装置进行了实验。合金的氧化曲线遵循抛物线定律。推断出Ti_3Al-Nb合金的氧化有效活化能为284 kJ / mol。使用X射线衍射(XRD),扫描电子显微镜(SEM)和能量色散X射线分析(EDX)技术分析了氧化产物。氧化产物主要是TiO_2(金红石),TiO和Al_2O_3(氧化铝)与少量氧化铌的混合物。发现通过添加铌提高了Ti_3Al的抗氧化性。在温度高于1273 K的Ti_3Al-Nb合金的氧化物尺度上观察到包含金红石和氧化铝混合物的层状结构。

著录项

  • 来源
    《High temperature materials and processes》 |2003年第2期|p.73-85|共13页
  • 作者

    R. G. Reddy; Y. Li; D. Mantha;

  • 作者单位

    Department of Metallurgical and Materials Engineering The University of Alabama, Tuscaloosa, AL 35487-0202, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 金属学与热处理;
  • 关键词

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