李亚敏,刘洪军,刘杰,郝远

• 1:兰州理工大学有色金属合金及加工教育部重点实验室

摘要(Abstract)：

利用热重分析法、X射线衍射、扫描电镜和能谱分析研究了Al和Co含量对K4169高温合金950℃高温氧化行为的影响,结果表明:合金氧化动力学符合抛物线规律;添加Al和Co的合金氧化产物颗粒比原始成分合金的细小;Al含量的增加增强了合金的高温抗氧化能力,而Co含量的增加降低了合金的高温抗氧化性能。当Al含量为1.45 wt%、Co含量为0.3 wt%时,合金的高温抗氧化性能最好,而原始成分合金的高温抗氧化性能最差。不同Al、Co含量K4169合金氧化膜都分为3层:外层主要是疏松的Cr2O3和TiO2的混合层,还含有少量的NiO和NiCr2O4尖晶石相;中间层是Cr2O3保护层;内氧化物层是Al2O3。

关键词(KeyWords)： K4169高温合金;高温氧化;氧化动力学;氧化膜

Abstract:

Keywords:

基金项目(Foundation): 甘肃省自然科学基金(3ZS042-B25-028)

作者(Author): 李亚敏,刘洪军,刘杰,郝远

DOI: 10.13289/j.issn.1009-6264.2011.06.022

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