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Cr对镍基合金在超临界水中氧化行为的影响研究
Effect of Cr Content on Oxidation of Ni-based Alloy in SupercriticalWater

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谢冬柏 1 *   周游宇 2   鲁金涛 3   王文 2   朱圣龙 2   王福会 4  
文摘 研究了3种Cr含量Ni-Fe-Cr合金在700 ℃/25 MPa纯水蒸汽环境中的氧化行为,重点分析了氧化动力学、氧化膜相组成及微观结构的变化规律。结果表明,随Cr含量的增加,合金在超临界水中的氧化增重持续降低,失稳氧化发生时间被延长,合金的抗氧化性能得到显著改善。在超临界水环境中,Cr_2O_3氧化膜更容易失效,维持保护性Cr_2O_3氧化膜稳定的临界Cr含量相比于干燥空气中的要高;Ni-Fe-Cr合金在超临界水中氧化时优先生成Cr_2O_3氧化膜,其中较低Cr含量的合金长期氧化后,在两层氧化膜界面处会形成较薄的富Ni氧化膜。
其他语种文摘 The oxidation behavior of three Ni-Fe-Cr alloys with different contents of Cr was studied in supercritical water at 700 ℃ under 25 MPa. Oxidation kinetics was acquired by weighting samples at intervals. After oxidation, the surface and cross-sectional morphologies, and phase compositions of the oxide scales were investigated using SEM/EDS and XRD. The results showed that the high Cr-content enhances the oxidation resistance of Ni-Fe-Cr alloys in supercritical water, i.e. lowering the mass gains and postponing the onset of breakaway oxidation. In supercritical water, the critical concentration of Cr, needed for the formation as well as sustained and steady growth of the protective chromia scale on Ni-Cr- Fe alloys, is higher than that in air. And in supercritical water, the protective Cr-rich oxide scale forms after a short time exposure. However, this protective Cr-rich oxide scale transforms to non-protective scale more easily in the further oxidation process. As exposure time increases, a duplex oxide scale forms on the alloy with low Cr concentration, and Ni-rich oxide exists in between the two oxide layers.
来源 中国腐蚀与防护学报 ,2018,38(4):358-364 【核心库】
DOI 10.11902/1005.4537.2017.160
关键词 镍基合金 ; Cr含量 ; 超临界水 ; 高温氧化
地址

1. 新疆警察学院刑事科学技术系, 乌鲁木齐, 830011  

2. 中国科学院金属研究所, 金属腐蚀与防护国家重点实验室, 沈阳, 110016  

3. 西安热工研究院有限公司, 国家能源清洁高效火力发电技术研发中心, 西安, 710032  

4. 东北大学材料科学与工程学院, 沈阳, 110819

语种 中文
文献类型 研究性论文
ISSN 1005-4537
学科 金属学与金属工艺
基金 2017年公安部科技强警基础工作专项 ;  西安热工研究院有限公司国家能源清洁高效火力发电技术研究中心研究项目 ;  江西省材料表面工程重点实验室开放课题
文献收藏号 CSCD:6319344

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引证文献 3

1 朱忠亮 镍基合金Inconel617B在700 ℃超临界水环境中的氧化行为研究 中国腐蚀与防护学报,2022,42(4):655-661
被引 2

2 文翼 Ni-Cr-Mo-Cu多孔材料的高温氧化行为 中国有色金属学报,2022,32(8):2284-2296
被引 0 次

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